1- A portal system is a vessel that carries blood from one capillary bed to another capillary bed without traveling to the heart first. The correct answer is C.
A portal system consists of two capillary beds connected by a portal vein. Blood travels from the first capillary bed, through the portal vein, and then to the second capillary bed without passing through the heart. This allows for specific functions such as filtering, absorption, or hormone secretion to occur before the blood reaches the general circulation. The correct answer is C.
2- The structures of the heart (in order) through which blood passes, starting with the venae cavae and ending with the aorta, are as follows:
Venae cavae: Deoxygenated blood enters the heart through the superior and inferior venae cavae, which are large veins that bring blood back from the body.Right atrium: Blood from the venae cavae flows into the right atrium of the heart.Tricuspid valve: Blood passes through the tricuspid valve, which separates the right atrium from the right ventricle.Right ventricle: Blood is pumped from the right atrium into the right ventricle.Pulmonary valve: Blood leaves the right ventricle through the pulmonary valve, which leads to the pulmonary artery.Pulmonary artery: Deoxygenated blood is carried by the pulmonary artery to the lungs for oxygenation.Lungs: In the lungs, blood picks up oxygen and gets rid of carbon dioxide through the process of gas exchange.Pulmonary veins: Oxygenated blood returns from the lungs to the heart through the pulmonary veins.Left atrium: Oxygenated blood enters the left atrium of the heart.Mitral valve: Blood passes through the mitral valve, which separates the left atrium from the left ventricle.Left ventricle: Blood is pumped from the left atrium into the left ventricle.Aortic valve: Blood leaves the left ventricle through the aortic valve.Aorta: Oxygenated blood is carried by the aorta, the largest artery in the body, to supply the systemic circulation.Therefore, the structures of the heart through which blood passes, starting with the venae cavae and ending with the aorta, are venae cavae, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, lungs, pulmonary veins, left atrium, mitral valve, left ventricle, aortic valve, and aorta.
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13. Which neurotransmitter activates receptors that result in the excitation observed during the initiation of long-term potentiation (LTP)?
A. Glutamate
B. Acetylecholine
C. Serotonin
D. Dopamine
14. Events that lead to the plasticity seen in LTP depend on what ion flowing into the postsynaptic neuron?
A. Calcium (Ca2+)
B. Potassium (K+)
C. Nitric oxide (NO)
D. Sodium (Na+)
15. Capgras syndrome or delusion suggests an important connection between emotional and visual memory. It also shows us, at least in a theoretical sense, those memories….
A. Are consolidated and remain constant like the original copy of a file on a computer
B. Are not constant in the sense that they are updated after use and upon reconsolidation differ, at least somewhat from originally retrieved memories
C. Really cannot be understood in the context of brain injured subjects due to the imposter syndrome
D. For people with whom we have close and regular relationships, like
The neurotransmitter that activates receptors resulting in the excitation observed during the initiation of long-term potentiation (LTP) is A. Glutamate.
Glutamate is the primary excitatory neurotransmitter in the central nervous system and plays a crucial role in synaptic plasticity, including the induction of LTP. The ion that flows into the postsynaptic neuron and is essential for the plasticity observed in LTP is A. Calcium (Ca2+). Calcium influx into the postsynaptic neuron is a key event in LTP and triggers a cascade of intracellular signaling pathways that lead to the strengthening of synaptic connections and the long-term enhancement of neural transmission. It also shows us, at least in a theoretical sense, that memories B. Are not constant in the sense that they are updated after use and upon reconsolidation differ, at least somewhat from originally retrieved memories.
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State what the main role as well as overlapping duties of the following health professions.
Physician Assistant vs Nurse (DNP /FNP or ARNP)
Medical Doctor vs Chiropractor
The main role of PAs, DNPs/FNPs/ARNPs, MDs, and chiropractors is to deliver healthcare services. The level of autonomy, the scope of practice, and the specific focus areas vary among these professions.
Physician Assistants (PAs) are healthcare professionals who work under the supervision of physicians. Their main role is to provide diagnostic, therapeutic, and preventive healthcare services .Nurses with a Doctor of Nursing Practice (DNP) or Family Nurse Practitioner (FNP) or Advanced Registered Nurse Practitioner (ARNP) designation have an expanded scope of practice.
Medical Doctors (MDs) are physicians who have completed medical school and obtained a Doctor of Medicine degree. Their main role is to diagnose, treat, and manage diseases and injuries. Chiropractors are healthcare professionals who focus on the diagnosis and treatment of musculoskeletal disorders, particularly spinal conditions.
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1. A non-pregnant female's uterus shed its lining (the outer endometrial layer) every 4 weeks and then begins the menstrual cycle anew, the cycle's timing being controlled by female reproductive hormones. A successful pregnancy requires that the menstrual cycle be interrupted and the fetus left undisturbed for 9 months. Cycle interruption is accomplished by the fetal placenta, which secretes several key hormones that manipulates maternal reproductive physiology. Give at least three (3) hormones that control the maternal reproductive physiology, give their specific functions/role.
A successful pregnancy requires that the menstrual cycle be interrupted and the fetus left undisturbed for 9 months.
Cycle interruption is accomplished by the fetal placenta, which secretes several key hormones that manipulates maternal reproductive physiology. Three hormones that control the maternal reproductive physiology along with their specific function/role are as follows:Progesterone is one of the primary hormones that help in maintaining pregnancy by keeping the uterus wall thickened. It also helps in preventing the ovulation during the pregnancy.Gonadotrophin-Releasing Hormone (GnRH) is a hormone released by the hypothalamus in the brain.
It helps in the secretion of the follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the pituitary gland which regulates the menstrual cycle. GnRH also helps in maintaining pregnancy by reducing the secretion of FSH and LH which prevent menstruation and ovulation.Oestrogen is another hormone that is produced in the ovaries. During pregnancy, it helps in developing the fetus's reproductive system, preparing the breasts for lactation, and also helps in maintaining a healthy pregnancy by improving the blood flow to the uterus wall.
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Describe how the binding of an agonist to a receptor is transduced to a physiological response through the activation of the IP3 second messenger pathway and how this can be modulated with drugs (34 marks)
(Please provide full details)
Agonist is defined as a drug or substance that binds to and activates the receptor of interest. When an agonist binds to a receptor, it initiates a conformational change that is transduced into a physiological response.
One way to transduce this response is through the IP3 second messenger pathway. The IP3 second messenger pathway is a signaling pathway that begins when an agonist binds to a receptor and triggers the activation of a G protein. The activated G protein then activates an enzyme called phospholipase C (PLC).
PLC cleaves the phospholipid phosphatidylinositol 4,5-bisphosphate (PIP2) into two second messengers diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3).The second messenger IP3 then diffuses through the cytoplasm and binds to its receptor on the endoplasmic reticulum (ER) membrane. This causes the release of calcium ions (Ca2+) from the ER into the cytoplasm.
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Please list in order the blood vessels to the lungs
starting from the R ventricle and ending at the
alveoli.
The blood vessels that carry blood to the alveoli in the lungs starting from the right ventricle are pulmonary arteries, pulmonary arterioles, and pulmonary capillaries.
The journey of blood from the right ventricle to the alveoli involves three main types of blood vessels: pulmonary arteries, pulmonary arterioles, and pulmonary capillaries.
Pulmonary Arteries
The first step in this process is the pulmonary arteries. These arteries carry deoxygenated blood from the right ventricle of the heart to the lungs. The pulmonary arteries split into smaller branches called pulmonary arterioles as they reach the lungs.
Pulmonary Arterioles
The pulmonary arterioles are the next set of blood vessels in line. They receive blood from the pulmonary arteries and further divide into even smaller vessels called pulmonary capillaries. The arterioles help regulate blood flow to the lungs and play a crucial role in maintaining blood pressure within the pulmonary circulation.
Pulmonary Capillaries
The final step is the pulmonary capillaries. These tiny, thin-walled vessels form an intricate network within the lungs. The pulmonary capillaries surround the alveoli, which are the tiny air sacs where oxygen exchange takes place. As the blood flows through the capillaries, it comes in close proximity to the alveoli, allowing for efficient gas exchange. Oxygen diffuses from the alveoli into the capillaries, while carbon dioxide moves in the opposite direction to be exhaled.
In summary, the blood vessels that transport blood to the alveoli in the lungs starting from the right ventricle are pulmonary arteries, pulmonary arterioles, and pulmonary capillaries. This journey ensures that deoxygenated blood is oxygenated through the process of respiration, allowing for the exchange of gases to support bodily functions.
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31. before the horomone PTH (parathyroid hormone) is released blood calcium levels are ___, which stimulates PTH release. The target cells for PTH are osteoclasts.
A. decrease
B. constant level
C. increase
41. At the beginning spermatogenesis, the spermatogoniun undergoes a type of all division that produces a second spermatogonium as well as a(an).
A. spermatogoniun
B. Spermatid
C. secondary spermatocyte
D. primary spermatocyte
42. which of the following hormones will help the mother retain water?
A. aldosterone
B. patathyroid hormone
C. oxytocin
D. progesterone
A. decrease
Before the hormone PTH (parathyroid hormone) is released, blood calcium levels decrease, which stimulates PTH release. The target cells for PTH are osteoclasts.
The release of parathyroid hormone (PTH) is regulated by blood calcium levels. When blood calcium levels decrease, it triggers the release of PTH. PTH acts on its target cells, which are osteoclasts, specialized cells responsible for breaking down bone tissue. By targeting osteoclasts, PTH helps to increase blood calcium levels.
PTH plays a crucial role in maintaining calcium homeostasis in the body. It acts on the bones, kidneys, and intestines to regulate calcium levels. In the case of low blood calcium levels, PTH stimulates osteoclast activity, leading to increased bone resorption. Osteoclasts break down bone tissue, releasing calcium into the bloodstream.
Additionally, PTH enhances calcium reabsorption in the kidneys, reducing calcium loss through urine. It also promotes the production of active vitamin D, which increases calcium absorption in the intestines. These actions collectively work to elevate blood calcium levels, restoring them to the optimal range.
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Which of the following is an INCORRECT statement? (Check all that apply) a. The atrial stretch reflex stimulates reflex bradycardia. b. The atrial stretch reflex leads to reduced urine formation. c. When using a sphygmomanometer to measure blood pressure, first sound is heard when the cuff pressure reaches the systolic pressure. d. If a person's blood pressure measurement shows 120/80, it means that the last Korotkoff sound was heard when the pressure in the cuff reached 120mmHg. e. When using a sphygmomanometer to measure blood pressure, the artery is silent when the cuff pressure is higher than the systolic pressure of lower than the diastolic pressure. f. When using a sphygmomanometer to measure blood pressure, the arterial blood flor fominar when the cuff pressure is between the systolic pressure and the diastolic pressure.
g. The mean arterial pressure reflects the stroke volume, and the pulse pressure drives the blood into the capillaries. h. Chronic high blood pressure resulting from diabetes complications can be referred to as secondary hypertension. i. Preeclampsia is due to an inadequate blood flow to match oxygen usage in the tissues. j. congestive heart failure can result from any condition that weakens the contractility of the ventricular myocardium.
The incorrect statements are:
b. The atrial stretch reflex leads to reduced urine formation.
d. If a person's blood pressure measurement shows 120/80, it means that the last Korotkoff sound was heard when the pressure in the cuff reached 120mmHg.
e. When using a sphygmomanometer to measure blood pressure, the artery is silent when the cuff pressure is higher than the systolic pressure or lower than the diastolic pressure.
g. The mean arterial pressure reflects the stroke volume, and the pulse pressure drives the blood into the capillaries.
b. The atrial stretch reflex, triggered by increased blood volume, actually leads to increased urine formation through the release of atrial natriuretic peptide, promoting diuresis.
d. The last Korotkoff sound is heard when the pressure in the cuff drops below the diastolic pressure, not when it reaches the systolic pressure.
e. The artery remains open and blood flow is audible during the entire cardiac cycle, including when the cuff pressure is higher than the systolic pressure or lower than the diastolic pressure.
g. The mean arterial pressure represents the average pressure throughout the cardiac cycle, while the pulse pressure is the difference between systolic and diastolic pressures, and it helps propel blood forward during ventricular contraction.
Therefore, options b, d, e, and g are the incorrect statements
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how were redi’s and pasteur’s experiments similar?
The experiments conducted by Redi and Pasteur had similarities in terms of their goals and methodology.
Both scientists aimed to disprove the theory of spontaneous generation, which proposed that living organisms could arise from non-living matter.
In Redi's experiment, he used three jars with decaying meat: one left open, one covered with gauze, and one tightly sealed. He observed that flies only appeared in the open jar, suggesting that flies were responsible for the generation of maggots and not spontaneous generation.
Similarly, Pasteur conducted an experiment using flasks containing broth. He used a swan-neck flask that allowed air to enter but prevented dust and microorganisms from reaching the broth. The broth in the flask remained sterile unless the neck was broken, allowing microorganisms to contaminate it. This experiment supported the idea that microorganisms did not spontaneously generate but rather came from external sources.
Both experiments showed that living organisms did not arise spontaneously but instead came from pre-existing living organisms. Redi's experiment focused on macroscopic organisms like flies and maggots, while Pasteur's experiment focused on microorganisms.
In summary, Redi and Pasteur's experiments were similar as they aimed to disprove spontaneous generation and demonstrated that living organisms came from pre-existing living organisms. Their experiments provided evidence for the principle of biogenesis, which states that life only arises from other living organisms.
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During a push up, what muscles are active concentrically,
eccentrically, and as stabilizers during the moving up and moving
down phase.
During the push-up, the muscles that are active concentrically, eccentrically, and as stabilizers during the moving up and moving down phase are as follows: Concentrically active muscles during push-ups The pectoralis major (clavicular head), deltoid anterior, and triceps brachii are the primary concentrically active muscles during the push-up's moving up phase.
Eccentrically active muscles during push-ups The pectoralis major (sternal head) and anterior deltoid are the primary eccentrically active muscles during the push-up's moving down phase. Muscles active as stabilizers during push-ups The serratus anterior, trapezius (lower fibers), and rotator cuff muscles function as stabilizers throughout the movement of push-ups. During a push-up, the serratus anterior is responsible for scapular stability and winging prevention.
The trapezius (lower fibers) is responsible for retracting and depressing the scapula, providing stability to the shoulders, and aligning the head with the spine. The rotator cuff muscles, including the subscapularis, supraspinatus, infraspinatus, and teres minor, work together to stabilize the humeral head and maintain the proper alignment of the glenohumeral joint.
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Which of the following is a FAl SE statement? (Check all that apply) a. The transport of hormones is one of the regulatory functions of the blood. b. The secretion of hormones is one of the regulatory functions of the blood. c. The cardiovascular system includes the heart, blood vessels and lymphatic organs. d. The blood leaving the heart enters an artery, the blood returns to the heart from a vein. e. Hemoglobin is the main protein found in the blood plasma. f. Fibrinogen plays a crucial role in blood clotting. g. When hypothalamic osmoreceptors are activated, more ADH is released from the anterior pituitary. h. Leucocytes cross the capillary wall by a process call dialysis. i. Thrombocytes are form from the fragmentation of large cells called megakaryocytes. j. All granulocytes are from the myeloid lineage.
The false statements are:
(e) Hemoglobin is the main protein found in the blood plasma.
(h) Leucocytes cross the capillary wall by a process called dialysis.
(j) All granulocytes are from the myeloid lineage.
(e) Hemoglobin is not found in the blood plasma. Hemoglobin is a protein found inside red blood cells and is responsible for carrying oxygen. The main proteins found in blood plasma are albumin, globulins, and fibrinogen.
(h) Leukocytes, or white blood cells, do not cross the capillary wall by dialysis. They are able to cross the capillary wall through a process called diapedesis or leukocyte extravasation. This process involves the white blood cells squeezing between the endothelial cells lining the capillaries and entering the surrounding tissue.
(j) Not all granulocytes are derived from the myeloid lineage. Granulocytes are a category of white blood cells that have granules in their cytoplasm. While most granulocytes are derived from the myeloid lineage, eosinophils are an exception as they are derived from the common myeloid progenitor but undergo further maturation in the presence of specific growth factors.
Therefore, options E, H, and J are the false statements
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Undertake research into mutations in genes encoding the following proteins in the ETC and ATP synthase: Complex I, Complex III, Complex IV and Complex V (ATP synthase). Choose one example for each Complex. For each, create a table which includes a brief summary of the effect of the mutation, and name the associated disorder.
Mutations in genes that encode the proteins in the ETC and ATP synthase lead to mitochondrial disorders that result in energy production failure and various organ dysfunctions.
Complex I, also known as NADH dehydrogenase, is the first enzyme of the electron transport chain and is responsible for transferring electrons from NADH to ubiquinone. The electrons then pass from ubiquinone to other electron carriers in the electron transport chain.
Complex II, also known as succinate dehydrogenase, is responsible for transferring electrons from succinate to ubiquinone. The electrons then pass from ubiquinone to other electron carriers in the electron transport chain.
Complex III, also known as cytochrome c reductase, is responsible for transferring electrons from cytochrome c to ubiquinol. The electrons then pass from ubiquinol to other electron carriers in the electron transport chain.
Complex IV, also known as cytochrome c oxidase, is responsible for transferring electrons from cytochrome c to oxygen. The electrons then pass from oxygen to other electron carriers in the electron transport chain.
| Complex I | Disorder | Effect of Mutation |
|-----------|-----------------------|-------------------------------------------------------------------------------------------------------------|
| | Leigh Syndrome | Mutation in NDUFV1 |
| | NARP Syndrome | Mutation in MT-ND6 |
| | MELAS Syndrome | Mutation in MT-ND5 |
| Complex III | Disorder | Effect of Mutation |
| | Myopathy | Mutation in BCS1L |
| | KSS Syndrome | Mutation in MT-CYB |
| Complex IV | Disorder | Effect of Mutation |
| | Leigh Syndrome | Mutation in COX7B |
| | Cytochrome c oxidase deficiency | Mutation in COX10 |
| Complex V | Disorder | Effect of Mutation |
| | Mitochondrial DNA Depletion Syndrome | Mutation in ATP5D |
| | NARP Syndrome | Mutation in MT-ATP6 |
ATP synthase is the enzyme responsible for the production of ATP from the energy that is released during the electron transport chain. It does not use ubiquinone or ubiquinol as substrates.
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Which adrenal cortical hormones stimulate somatic changes at puberty in both sexes?
The adrenal cortical hormones that stimulate somatic changes at puberty in both sexes are mainly androgens, such as testosterone. During puberty, the adrenal glands produce higher levels of androgens, which are responsible for the development of secondary sexual characteristics, including growth of facial and body hair, deepening of the voice, and increased muscle mass.
1. Puberty is a period of rapid growth and sexual maturation, characterized by various physical changes.
2. The adrenal glands, located on top of the kidneys, produce hormones that play a role in the development of secondary sexual characteristics.
3. Specifically, the adrenal cortical hormones, mainly androgens, stimulate somatic changes at puberty in both sexes. Androgens like testosterone are responsible for the development of masculine traits, such as increased body and facial hair, deeper voice, and increased muscle mass.
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Maria checks her temperature: 37.5 Celsius. Her employer requires that she stay home if she has a fever. What should Maria do? A. She should not go to work; she has a fever. B. She should take some ibuprofen to lower her fever and then go to work. C. She should go to the hospital; her temperature is dangerously low. D. She can go to work; she does not have a fever.
Correct answer is A. She should not go to work; she has a fever to prevent spreading the illness and prioritize her health.
Maria's temperature reading of 37.5 degrees Celsius indicates that she has a fever. As per her employer's requirement, she should stay home if she has a fever. Going to work while having a fever can potentially spread the illness to colleagues and compromise her own well-being. It is crucial for Maria to prioritize her health and take the necessary steps to recover before returning to work.
Fever is often a sign of an underlying infection or illness in the body. It is the body's natural response to fight off infections by raising its internal temperature. By staying home, Maria can rest and provide her body with the opportunity to recover.
Additionally, by avoiding the workplace, she minimizes the risk of infecting others, which is especially important if her work environment involves close contact with colleagues or customers.
Taking ibuprofen to lower her fever and then going to work (option B) is not recommended. While ibuprofen can temporarily reduce fever, it does not address the underlying cause of the fever.
Moreover, it is crucial to allow the body to rest and heal when it is fighting off an infection, and going to work while unwell can prolong the recovery process.
Going to the hospital (option C) is not necessary in this case, as Maria's temperature of 37.5 degrees Celsius does not indicate dangerously low body temperature. Hospital visits should be reserved for situations where there is a medical emergency or severe symptoms.
Choosing option D and going to work despite having a fever would not be responsible behavior. It could put others at risk of contracting the illness, and Maria may not be able to perform her job effectively while feeling unwell.
In summary, Correct answer is A. She should not go to work; Maria should prioritize her health and stay home from work since she has a fever. Taking rest, staying hydrated, and seeking medical advice if necessary will contribute to her recovery and prevent the spread of illness to others.
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Which vesse is missing from the following statement? "Tracing blood that drains from the large intestine, we find that blood drains from the distal colon is collected in the inferior mesenteric vein, merges with the splenic vein then directed to the hepatic portal vein, the liver sinusoids, and the inferior vena cava." a. hepatic vein b. azygos vein c. umbilical vein d. celiac vein
The inferior mesenteric vein, merges with the splenic vein then directed to the hepatic portal vein, the liver sinusoids, and the inferior vena cava" is "hepatic vein."
The hepatic vein is missing from the statement given. The blood that drains from the distal colon is collected in the inferior mesenteric vein, which then merges with the splenic vein. It is then directed to the hepatic portal vein and then to the liver sinusoids. From the liver sinusoids, the blood goes to the inferior vena cava.
The hepatic vein drains the liver into the inferior vena cava. It is an important vessel in the human circulatory system as it collects deoxygenated blood from the liver and carries it back to the heart for oxygenation. Therefore, the correct option is a. Hepatic vein.
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what is the structure of a typical fungas?
The structure of a typical fungi is hyphae and mycellium.
Fungi explained.
Fungi refer to a eukaryotic heterotrophs that is majorly multicellular except yeast. Fungi has cell wall made up of chitin and they are found in moist environments and strive well there.
The structures of a typical fungi includes hypae which are long filament network that make up the body, organelles and cytoplasm for metabolic activities, spores which is use for reproductive processes, mycellium is a network of hypae which is the major body components.
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1.1 Convex Lenses A. Consider a distant object located on the principal axis (it's physical dimensions may extend beyond the axis). On the diagram, below, sketch several rays form this distant object that reach the lens. How are these rays oriented with respect to one another? How are they oriented with respect to the principal axis? What happens to the orientation of these rays if the object is moved even farther from the lens? Based on your understanding of lenses, or observations of the PhET simulation, draw the continuation of each of these rays through the lens on the other side. Indicate where the rays converge on the diagram. (Note: Refraction takes place at both surfaces of the lens. However, in drawing ray diagrams for very thin lenses, it is customary to draw the rays as if refraction all takes place at the center of the lens.) B. Suppose you placed a small bulb at the location where the rays converged from part A. How would the rays from the bulb that pass through the lens be oriented? Draw a diagram to illustrate your answer and explain.
The convex lenses are those that refract light rays, converging them to a focal point. The image formed on the other side of the lens is inverted and reduced in size. Let's consider a distant object that is placed on the principal axis, and the physical dimensions may extend beyond the axis.
The rays are oriented parallel to one another and are converged to a point after passing through the lens. They are oriented parallel to the principal axis before passing through the lens. The rays are oriented parallel to the principal axis before passing through the lens. If the object is moved even farther from the lens, the rays remain parallel to one another, but the point of convergence moves closer to the focal point.
If a small bulb is placed at the point of convergence of the rays that pass through the lens, the rays will be divergent. The rays that emerge from the convex lens, in this case, will be oriented as if they had originated from the focal point of the lens. This is because the bulb is placed at the focal point of the lens, and the rays that emerge from the lens are refracted parallel to the principal axis.
Therefore, the image formed on the screen will be an inverted and magnified image. The image's orientation can be determined using the convex lens ray diagram.
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Word or phrase bank medial temporal lobes. caudal Head pons lateral eye movement sciatic nerve taste sensation Midbrain 31 pairs inner ears PNS 12 pairs medullar oblongata fibular nerve superior oblique hip joints Medially simultaneously Ischial gluteal upper limbs CNS dorsal root and ventral roots extrinsic eye sensory and motor signals anterior thigh occipital lobes neck taste sensations skeletal muscles crossed extensor rami intrinsic and extrinsic thoracic and abdominopelvic quadricep visceral signals Hearing anterolateral somatosensory cortex encapsulated nerve sense organ motor neuron larynx and pharynx effectors biceps and skin lumbosacral maxillary nerve spinal cord thermoreceptors and nociceptor lateral rectus medial arm the pons and the medullar oblongata nerve plexus mastication in the mouth. sternocleidomastoid abdominal wall and iliopsoas stretch reflex odorant stimuli side opposite 3 types internal and internal Heart optic chiasma nociceptors Foot swallowing somatic motor signals Golgi tendon interceptors interneuron photoreceptors deltoid teres minor exteroceptors thermoreceptors Electromagnetic Afferent triceps brachii anterior forearm develop command abductor anterior special sense vision, and taste two criterial neurological and sensory chemoreceptors multiple synapses Mechanoreceptors tibia monosynaptic stretch thermoreceptors synapses Afferent Eye withdrawer organ
6. The facial nerve, which is responsible for facial expressions and other facial muscles, originates from the …………………… and the medullar oblongata and terminates on the facial muscles the provide ……………………. and somatic sensation from the external eye and nasal cavities. The trigeminal nerve has 3 branches, the ophthalmic nerve, the…………………., and the mandibular nerve. Their origin is from between …………………………………………. and innervates the primary ………………………………for facial sensations. The mandibula nerve innervates the muscles for ……………………………
8. A spinal nerve is a mix nerve when it carries …………………………………. between the spinal cord and the rest of the body. There are …………………………. of spinal nerves, one pair on each segment. Each spinal nerve comprises of ………………………………………. converging together to form one route. The anterior root carries somatic and visceral information motor signals from the ……………………….to the ……………………….and the gland cells, while the posterior root carries sensory signals from the …………………………to the…………………………...
9. The spinal nerves further divided bundles of funicles of nerves called…………………… The ramus communicans that carries …………………………. from the ANS to organs of the body cavities whiles the anterior and posterior rami that carry ……………………………from CNS to …………………………….and carries sensory signals from the receptor in the PNS to the………………………………….
10. The anterior rami of the lumbar ramus, cervical ramus, and sacral ramus, converged to form what we call the……………... They are complicated interwoven network of nerve fibers. The cervical plexus is just under the ………………………. muscles, from C1 to C4. Branches of the cervical plexus innervates mostly the…………………, the skin, and muscles. The Phrenic nerve innervates the top of the …………………. after passing through the thoracic cavity alongside of the……………... 11. The sacral plexus lies …………………. to the lumbar plexus from L4 to L5. It is sometimes called the …………………………………. plexus. This plexus innervates the ……………………muscles, the pelvic muscles, and the lower limbs. The sacral plexus is further divided in to 3 nerves, the……………………., which is the largest and longest nerve of the body, innervates the pelvis, the thigh, grater trochanter, and the ………………………. tuberosity. They also innervate the ………………… in the posterior thigh before innervating the tibia and the fibular. The second branch of the sacral plexus is the ………………………. nerve that innervates the posterior leg and intrinsic muscles of the………………………... The third branch of the sacral plexus is the ……………………. which innervates muscles of the …………………. legs, knee joints, skin, and digitals.
6. The facial nerve, which is responsible for facial expressions and other facial muscles, originates from the pons and the medullar oblongata and terminates on the facial muscles that provide motor function and somatic sensation from the external eye and nasal cavities. The trigeminal nerve has 3 branches, the ophthalmic nerve, the maxillary nerve, and the mandibular nerve. Their origin is from between the lateral and medial temporal lobes and innervates the primary somatosensory cortex for facial sensations. The mandibula nerve innervates the muscles for mastication in the mouth.
8. A spinal nerve is a mix nerve when it carries sensory and motor signals between the spinal cord and the rest of the body. There are 31 pairs of spinal nerves, one pair on each segment. Each spinal nerve comprises of dorsal root and ventral roots converging together to form one route. The anterior root carries somatic and visceral information motor signals from the CNS to the effectors and the gland cells, while the posterior root carries sensory signals from the receptors in the PNS to the CNS
9. The spinal nerves further divided bundles of funicles of nerves called nerve plexus. The ramus communicans that carries visceral signals from the ANS to organs of the body cavities while the anterior and posterior rami that carry somatic signals from CNS to skeletal muscles and carries sensory signals from the receptor in the PNS to the CNS.
10. The anterior rami of the lumbar ramus, cervical ramus, and sacral ramus, converged to form what we call the nerve plexus. They are complicated interwoven network of nerve fibers. The cervical plexus is just under the sternocleidomastoid muscles, from C1 to C4. Branches of the cervical plexus innervate mostly the neck, the skin, and muscles. The Phrenic nerve innervates the top of the diaphragm after passing through the thoracic cavity alongside of the internal thoracic artery.
11. The sacral plexus lies caudal to the lumbar plexus from L4 to L5. It is sometimes called the lumbosacral plexus. This plexus innervates the gluteal muscles, the pelvic muscles, and the lower limbs. The sacral plexus is further divided into 3 nerves, the sciatic nerve, which is the largest and longest nerve of the body, innervates the pelvis, the thigh, greater trochanter, and the ischial tuberosity. They also innervate the hamstring in the posterior thigh before innervating the tibia and the fibular. The second branch of the sacral plexus is the tibial nerve that innervates the posterior leg and intrinsic muscles of the foot. The third branch of the sacral plexus is the common fibular nerve which innervates muscles of the anterior thigh, lateral and anterior leg, knee joints, skin, and digitals.
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If you had to choose a singular source to get your energy from, what would you choose? Why?What are two benefits and downsides of your choice, and how would they impact vou?
If I had to choose a singular source to get my energy from, I would choose solar energy. It is renewable, abundant, and environmentally friendly.
Solar energy offers several benefits as a singular energy source. Firstly, it is renewable and widely available, harnessing the power of the sun's rays. This means it can be consistently accessed without depleting natural resources. Secondly, solar energy is environmentally friendly, producing clean electricity without greenhouse gas emissions or air pollution. It helps combat climate change and reduces reliance on fossil fuels. However, there are also downsides to relying solely on solar energy. One downside is its intermittent nature. Solar power generation depends on sunlight, so it is not consistently available during nighttime or cloudy periods. This necessitates energy storage systems or backup power sources. Another downside is the high initial installation cost. Solar panels and associated infrastructure can be expensive, although costs have been decreasing over time. These benefits and downsides would impact me as an individual. I would have access to clean, renewable energy, contributing to sustainability and reducing my carbon footprint. However, the intermittency of solar energy may require additional planning and investment in energy storage or backup systems, and the upfront costs could pose a financial challenge initially. Nonetheless, the long-term benefits and environmental advantages make solar energy an appealing choice.
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Glycogenesis is a metabolic process that is triggered by when energy levels are high as indicated by high cellular concentration of the main molecule of energy transfer. As glucose enters the cells it becomes I to glucose-6-phosphate, which is also the initial step in the process by which glucose is broken down for energy. From there glucose-6-phosphate is then converted to its isomer, and polymerized into a macromolecule of for energy storage.
Glycogenesis is a metabolic process that is triggered by high cellular concentration of the main molecule of energy transfer. The process involves glucose being stored as glycogen when the levels of energy are high.
The glycogenesis process begins with the conversion of glucose into glucose-6-phosphate in the cells which is also the initial step in the process by which glucose is broken down for energy. Glucose-6-phosphate is then converted to its isomer, which is Fructose-6-phosphate, by the action of phosphoglucoisomerase enzyme. This enzyme changes the position of the hydroxyl group of carbon atom 1 to carbon atom.
The fructose-6-phosphate is then converted to glucose-1-phosphate by the action of enzyme phosphor hexokinase. The glucose-1-phosphate is converted to UDP glucose by the action of enzyme UDP glucose pyro phosphorylase. This UDP glucose reacts with glycogen in, a protein primer that provides a binding site for glycogen synthase.
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Kindly help me answer, i'll rate your response
Compare and contrast Chron's Disease and Ulcerative Colitis, including
the etiology, pathogenesis, and signs/symptoms of each disorder. Be
sure to discuss key characteristics that enable health care professionals
to tell the difference between the two diseases.
Compare and contrast Marasmus and Kwashiokor. Be sure to discuss
the specific nutritional deficiencies involved with each condition and any
unique signs/symptoms (manifestations) related to the deficiencies. How
are the signs/symptoms related to the nutritional deficiencies?
Crohn's Disease and Ulcerative Colitis are both inflammatory bowel diseases. Crohn's disease can affect any part of the gastrointestinal tract from the mouth to the anus.
Ulcerative colitis, on the other hand, is limited to the colon (large intestine) and rectum. The following is a comparison and contrast between Crohn's disease and ulcerative colitis: Etiology The exact cause of Crohn's disease is unknown, but it's thought to be caused by a combination of factors such as genetics, environment, and a malfunctioning immune system. Ulcerative colitis is also thought to be caused by a malfunctioning immune system, but the exact cause is unknown.PathogenesisIn Crohn's disease, inflammation can occur anywhere along the gastrointestinal tract. The inflammation extends into the deeper layers of the bowel tissue, leading to the formation of ulcers.
In ulcerative colitis, inflammation is limited to the colon and rectum's surface layers, leading to the formation of ulcers on the colon's lining.Signs and SymptomsCrohn's Disease - Symptoms of Crohn's disease include abdominal pain, diarrhea, bloody stools, weight loss, fever, and fatigue. The symptoms may come and go and are different for everyone.Ulcerative Colitis - Symptoms of ulcerative colitis include abdominal pain, diarrhea, bloody stools, and an urgent need to defecate. These symptoms may come and go and vary in severity.Telling the differenceCrohn's disease affects the gastrointestinal tract's entire thickness, while ulcerative colitis affects only the colon's surface layer. In Crohn's disease, the inflammation may occur anywhere along the gastrointestinal tract, whereas in ulcerative colitis, the inflammation is limited to the colon and rectum.
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Subunit vaccines like the pneumococcal pneumonia vaccine can't cause infection because _____
Subunit vaccines like the pneumococcal pneumonia vaccine cannot cause infection because they do not contain the whole pathogen.
These vaccines are made from specific components or subunits of the pathogen, such as proteins or polysaccharides, that are responsible for eliciting an immune response. By using only selected components, subunit vaccines eliminate the risk of causing the actual disease because they do not contain live or whole organisms capable of replication.
In the case of the pneumococcal pneumonia vaccine, it contains purified polysaccharides from the Streptococcus pneumoniae bacteria, which is the causative agent of pneumococcal pneumonia. These polysaccharides are chemically treated to enhance their immunogenicity but are not capable of causing a full-blown infection. When the vaccine is administered, the immune system recognizes these specific components as foreign and mounts an immune response by producing antibodies against them.
By targeting key components of the pathogen, subunit vaccines can induce a protective immune response without the risk of causing the disease. This makes them safe for use in individuals with weakened immune systems or those who may be more susceptible to infections.
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Fill in the chart below with information on the mammalian hypothalamic pituitary axis pathways in general. When considering the actions on various targets, consider only the direct action caused by the hormone binding to a receptor on that target, not any indirect actions caused by the entire pathway functioning properly.
Action on hypothalamus (stimulate, inhibit or no effect)
Action on anterior pituitary (stimulate, inhibit or no effect)
Action on Hormone C source (stimulate, inhibit or no effect)
Relative plasma concentration (high, medium, low)
Relative half-life (long, medium or short)
Hormone A
(hypothalamus)
Hormone B
(anterior pituitary)
Hormone C
(other endocrine cell or gland)
Action on hypothalamus (stimulate, inhibit, or no effect):
Hormone A: Stimulate or inhibit (depending on the hormone and feedback mechanism involved)
Following are the actions:
Action on anterior pituitary (stimulate, inhibit, or no effect):
Hormone A: Stimulate or inhibit (depending on the hormone and feedback mechanism involved).
Hormone B: Stimulate.
Action on Hormone C source (stimulate, inhibit, or no effect):
Hormone B: Stimulate.
Relative plasma concentration (high, medium, low):
Hormone A: Varies depending on the feedback mechanism and physiological conditions.
Hormone B: Varies depending on the feedback mechanism and physiological conditions.
Hormone C: Varies depending on the feedback mechanism and physiological conditions.
Relative half-life (long, medium, or short):
Hormone A: Varies depending on the specific hormone, ranging from short to long.
Hormone B: Varies depending on the specific hormone, ranging from short to long.
Hormone C: Varies depending on the specific hormone, ranging from short to long.
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Study Figures 2.16 and 5.17, both of which show pairs of molecules binding to each other. What would you predict about CCR5 that would allow HIV to bind to it? How could a drug molecule interfere with this binding?
A prediction about CCR5 that would allow HIV to bind to it is the presence of a specific receptor site on CCR5 that matches the binding site on the HIV envelope glycoprotein.
The prediction is based on the known mechanism of HIV entry into host cells. HIV primarily enters immune cells by binding to specific co-receptors on the cell surface. CCR5 is a chemokine receptor expressed on the surface of certain immune cells, including macrophages and T cells. For HIV to bind to CCR5, there needs to be a complementary fit between a specific region on the HIV envelope glycoprotein, known as the V3 loop.
The viral protein gp120, located on the envelope of the HIV virus, interacts with CCR5, facilitating viral entry into the host cell. This interaction triggers a conformational change in the viral envelope glycoprotein, leading to the fusion of the viral membrane with the host cell membrane and subsequent viral entry.
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Which of the following is not true regarding pain?
A. Although chronic pain does not adapt, acute pain shows significant sensory adaptation
B. Chronic pain signals are transmitted on unmyelinated C fibers
C. Cutting into the intestines is not painful
D. Acute pain signals are transmitted on myelinated A fibers
E. Chronic pain is more diffuse than acute pain
The statement that is not true regarding pain is: Cutting into the intestines is not painful.
What is pain?
Pain is a common experience of everyone. It’s an unpleasant sensation that is either constant or sporadic. There are a lot of myths that the general public believes. For instance, the myth that cutting into the intestines is not painful. However, cutting into the intestines is indeed painful.Cutting into the intestines is not painful is the statement that is not true regarding pain. Cutting into the intestines is an intrusive procedure and the tissues that are being cut have nerve endings in them. Nerve endings that are triggered send impulses to the spinal cord and the brain which is then interpreted as pain. A myth that goes around that humans don't feel pain in their intestines, but in reality, it's not accurate.
Chronic pain is a type of pain that occurs after an injury or surgery. It lasts for more than 3 months. On the other hand, acute pain is a type of pain that lasts for less than 3 months. Acute pain signals are transmitted on myelinated A fibers. Chronic pain signals, on the other hand, are transmitted on unmyelinated C fibers.
Although chronic pain does not adapt, acute pain shows significant sensory adaptation. Chronic pain is more diffuse than acute pain.
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Tenderness over the fibular head might indicate an avulsion of
which two muscles?
Tenderness over the fibular head might indicate an avulsion of the Biceps femoris and the Lateral collateral ligament (LCL) muscles.
The fibular head is located at the proximal end of the fibula. It is the site of attachment of the biceps femoris muscle and the lateral collateral ligament (LCL) of the knee joint. Biceps femoris muscle biceps femoris is a muscle of the posterior compartment of the thigh. It runs down the back of the leg and is located on the lateral side of the posterior thigh. It comprises two parts: the long head and the short head.
The long head arises from the ischial tuberosity, which is a bony prominence located on the pelvis. The short head arises from the femur, which is the long bone in the thigh. Lateral collateral ligament (LCL)The lateral collateral ligament (LCL) is a thick, strong ligament located on the lateral side of the knee joint. It provides lateral stability to the knee joint and prevents varus (bow-legged) stress.
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2 3 points Sexual excitation, erection, and orgasm is a function of: A. Sympathetic reflexia. B. Parasympathetic reflexia. C. Both A and B. D. Neither A nor B. E. Precentral gyrus 43 3 points In Oogenesis, the first meiotic division occurs: A. During prenatal development of a female child. B. When the oocyte is fertilized. C. Upon ovulation of the oocyte. D. Monthly in response to FSH and LH. 44 3 points The uterine tubes: A. Transportova. B. Provide a site for normal fertilization. C. Provides a site for normal implantation D. All of the above. E.Only two of the above.
Sexual excitation, erection, and orgasm are functions of both sympathetic reflexia and parasympathetic reflexia. Both the sympathetic and parasympathetic nervous systems play a role in the sexual response, with the sympathetic system being responsible for sexual arousal and erection, and the parasympathetic system being involved in orgasm.
In Oogenesis, the first meiotic division occurs during prenatal development of a female child. Oogenesis begins during prenatal development, where oogonia undergo the first meiotic division to form primary oocytes. This process is initiated before birth and remains arrested until puberty.
The uterine tubes, also known as fallopian tubes, have multiple functions. They transport ova from the ovaries to the uterus, providing a site for normal fertilization where sperm can meet the egg, and also serve as a possible site for normal implantation of a fertilized egg.
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9. Define the reflexogenic zones of the aortic arch and carotid sinus and specify their function. 10. The mechanisms of cardiovascular functional adjustment during physical activity. 11. Classification and possibilities of methods for examining of vascu- lar tone. 12. Lymphatic system. Describe the structure of lymphatic capillaries. 13. Describe the lymph is drained from the thoracic and right lym- phatic ducts. 14. What the lymph is. Explain its composition and properties 15. Name the locations of the lymph nodes and their functions. Describe how the tissue fluid and lymph are produced.
Reflexogenic zones are sensitive to mechanical stimulation which activates reflex mechanisms that lead to the regulation of the cardiovascular system.
Two reflexogenic zones, aortic arch and carotid sinus, play a crucial role in the regulation of blood pressure in response to changes in arterial pressure or other stimuli. Function of Reflexogenic ZonesAortic arch: The aortic arch contains baroreceptors that detect changes in arterial blood pressure. The vagus nerve sends signals to the brainstem in response to these changes, leading to changes in heart rate and contractility and vascular resistance. Carotid sinus: The carotid sinus is a widening of the carotid artery located at the bifurcation of the common carotid artery. It is filled with baroreceptors which respond to changes in arterial blood pressure, leading to reflex responses that regulate blood pressure.
Mechanisms of cardiovascular functional adjustment during physical activityThe cardiovascular system adjusts its function during physical activity by the following mechanisms:Increased cardiac outputIncrease in stroke volume Vasoconstriction of non-exercising muscleReduced total peripheral resistance11. Classification and possibilities of methods for examining vascular toneVascular tone can be examined using both invasive and non-invasive techniques. Non-invasive techniques include:Measurement of blood pressureBlood flow velocity using Doppler ultrasound Arterial tonometry with pulse wave analysisInvasive techniques include:Measurement of arterial pressure using a catheter.
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An unrooted tree containing four unrelated species can become rooted by adding _________.
An unrooted tree containing four unrelated species can become rooted by adding an outgroup.
An unrooted tree is a tree that does not have a designated root node. Unrooted trees are used to illustrate evolutionary relationships between a set of taxa. The branching structure of an unrooted tree specifies the relationships between different taxa, but it does not define which of these taxa is the common ancestor of the others.
An outgroup is a taxon or group of taxa that is phylogenetically close to the group of interest but is not part of it. An outgroup is added to an unrooted tree to provide a root, or point of comparison, for the evolution of the group of interest. The outgroup can be thought of as a benchmark for what the root should look like.
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1. Ricky, a 55-year-old man presented to hospital’s emergency room with severe, radiating substernal pain. He was overweight (BMI=40), however all other vital signs including cardiological assessments were normal. He admitted to imbibing excessive amount of alcohol the night before. He reported no overt use of nonsteroidal anti-inflammatory drugs (NSAIDs) but indicated that he sometimes experiences a burning sensation in your chest, with difficulty in swallowing and regurgitation of food or sour liquid. The doctor prescribed omeprazole and directed him perform an upper endoscopy.
(a) Identify the cause of Ricky’s pain and justify you answer.
(b) Briefly outline the mode of action of omeprazole in alleviating his symptoms.
a) The cause of Ricky's pain is gastroesophageal reflux disease (GERD).
GERD is characterized by the regurgitation of stomach contents into the esophagus. Ricky has difficulty swallowing, a burning sensation in his chest, and the regurgitation of food or sour liquid. Ricky's GERD is caused by his excessive alcohol consumption and his overweightness, which has contributed to his BMI of 40.
b) Omeprazole works by inhibiting proton pumps in the stomach from producing acid. It's a proton pump inhibitor that aids in the treatment of acid reflux. Omeprazole inhibits gastric acid secretion by binding to the enzyme H+/K+-ATPase in the gastric parietal cells, which is responsible for acid production.
It decreases the amount of acid that is secreted by the stomach, reducing the amount of acid that refluxes into the esophagus. By reducing the amount of acid produced by the stomach, omeprazole can alleviate the symptoms of acid reflux in Ricky.
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Which of the following are TRUE, when describing the interaction of Oxygen, Blood and Haemoglobin? Select All that are true Oxygen is highly soluble in plasma, and the majority of Oxygen is transported in solution dissolved in Plasma When describing Haemoglobin-Oxygen equilibrium, the term "P50" indicates the Partial Pressure of Oxygen at which 50% of haemoglobin Oxygen binding sites are occupied Interactions between Haemoglobin subunits generally decrease Haemoglobin- Oxygen affinity, giving the single protein Myoglobin a higher affinity for Oxygen over a wide range of PO2 The smaller increase in PO2 required to increase Haemoglobin saturation (from 25% to 50%, and again from 50% to 75% saturation), indicates an increase in haemoglobin affinity for Oxygen, after one binding site is occupied. High PCO2, acidity and/or temperature decreases the affinity of Haemoglobin for Oxygen, and increases Oxygen unloading As one Haemoglobin subunit binds 02, it and the other subunits adopt the Relaxed conformation & become more likely to bind another 02.
This Increased affinity promotes Oxygen "loading" where PO2 is high. The larger increase in PO2 required to fully saturate Haemoglobin (from 75% to 100%), indicates a decrease in haemoglobin affinity for Oxygen compared to haemoglobin that is partially saturated. As one Haemoglobin subunit releases O2, it and the other subunits adopt the Tense conformation & become less likely to bind another 02. This decreased affinity promotes Oxygen "unloading" where PO2 is low. High PCO2, acidity and/or temperature increases the affinity of Haemoglobin for Oxygen, and increases Oxygen loading, When describing Haemoglobin-Oxygen equilibrium, the term "P50 indicates the proportion of possible Haemoglobin binding sites bound to oxygen, at a Partial Pressure of Oxygen of 50 mmHg.
The following statements are TRUE when describing the interaction of Oxygen, Blood and Haemoglobin Oxygen is highly soluble in plasma, and the majority of Oxygen is transported in solution dissolved in Plasma.
When describing Haemoglobin-Oxygen equilibrium, the term "P50" indicates the Partial Pressure of Oxygen at which 50% of haemoglobin Oxygen binding sites are occupied.The smaller increase in PO2 required to increase Haemoglobin saturation (from 25% to 50%, and again from 50% to 75% saturation), indicates an increase in haemoglobin affinity for Oxygen, after one binding site is occupied.
As one Haemoglobin subunit releases O2, it and the other subunits adopt the Tense conformation & become less likely to bind another 02. This decreased affinity promotes Oxygen "unloading" where PO2 is low.High PCO2, acidity and/or temperature increases the affinity of Haemoglobin for Oxygen, and increases Oxygen loading.When describing Haemoglobin-Oxygen equilibrium, the term "P50 indicates the proportion of possible Haemoglobin binding sites bound to oxygen, at a Partial Pressure of Oxygen of 50 mmHg. Each Haemoglobin subunit binds O2.
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