When the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the left ventricle to the left atrium.
The heart valve and its functionsThe heart is a hollow organ of the circulatory system that uses its electrical activities to pump blood to the whole body
The structure of the heart consist of the following parts
The four chambers: Includes the left ventricle, right ventricle, left atrium and right atrium.The valves: This includes the mitral, tricuspid, pulmonary and aortic valves.The mitral valve is located in the left chamber of the heart between the left atrium and left ventricle. It maintains the one-directional flow of blood through the heart.
Therefore, when the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the left ventricle to the left atrium.
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The suggested ratio for the time of inhalation to exhalation when using breath control as a relaxation device is.
The suggested ratio for inspiration and expiration time during normal spontaneous breathing is 1:1.5 to 1:2 s with an inspiratory time of 0.8 to 1.2 s.
How to calculate inspiratory time?The inspiratory time can be calculated by dividing the tidal volume by the inspiratory flow. Thus, decreasing the VT or increasing the inspiratory flow, there is a decrease in the inspiratory time.
With this information, we can conclude that the suggested ratio for inspiration and expiration time during normal spontaneous breathing is 1:1.5 to 1:2s with an inspiratory time of 0.8 to 1.2 s. During mechanical ventilation, it will depend on the tidal volume, respiratory rate, inspiratory flow and inspiratory pause.
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what happens when the cell cycle is completed incorrectly.
This what happens to the cell cycle is completed incorrectly. Give me Brainiliest
The functions of vascular tissue in plants include:.
Answer: to provide nutrition, transport pathways for water and support plant’s body
An infection that occurs when a microbe breaks loose from a localized infection and is carried by the circulation to another tissue is called a(n) ______ infection.
Answer:
Focal
Explanation:
caused by the dissemination of microorganisms or toxic products from a focus of infection.
What cell part is responsible for capturing solar energy for a plant?.
Answer:
Chloroplasts are found in plants and algae. They're responsible for capturing light energy to make sugars in photosynthesis.
Based on what you learned in the lab, why does your body need to break down starch into glucose? starch contains more energy than glucose. starch molecules are too large to diffuse into cells. glucose molecules are larger than starch molecules.
Answer:
Starch molecules are too large to diffuse into
cells.
Explanation:
just did it
Your body needs to break down starch into glucose because starch molecules are too large to diffuse into cells. The size of the starch molecule is too large to pass through the cell membrane and into the cell where it is needed.
What is Starch?Starch is a complex carbohydrate made up of many glucose molecules bonded together in a long chain. When we consume starch, our digestive system breaks it down into individual glucose molecules, which can be absorbed into the bloodstream and used by cells for energy.
The starch molecule must first be broken down into its individual glucose units, which are small enough to pass through the cell membrane and be used for energy.
So, while it is true that starch contains more energy per molecule than glucose, and glucose molecules are actually smaller than starch molecules, the primary reason why our bodies need to break down starch into glucose is because of the size of the starch molecule itself.
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what is the total number of organisms of the same species living together in a given area at a given time
Answer:
The population is defined as the group of organisms of the same species that live in the same area. Organism – An organism is a single individual plant, animal or other living thing. 10.
What Receives blood from the right atrium
and pumps it into the lungs.
Answer:
The right ventricle
Explanation:
it pumps the blood from the right atrium into the lungs to pick up oxygen and remove carbon dioxide
An organism which lives directly on or in another organism without providing any benefits to its host is called a:hyphaebacteriasporeparasite
Answer:
Yes it is called a parasite.
Explanation:
It is called a parasite because a parasite doesn't give any benifits.
Drag the words to complete the sentences.
linear
single
circular
eukaryotic
prokaryotic
multiple
Before a cell divides, its DNA must be replicated without errors so that
the genetic codes for proteins are expressed properly. In
cells, which have linear chromosomes, replication
occurs in
locations and ends when all the
chromosomes are copied. In prokaryotic cells, which have
DNA, replication starts in only a single location and
proceeds until the entire chromosome is copied.
linear
single
circular
eukaryotic
prokaryotic
multiple
Before a cell divides, its DNA must be replicated without errors so that
the genetic codes for proteins are expressed properly. In
cells, which have linear chromosomes, replication
occurs in
locations and ends when all the
chromosomes are copied. In prokaryotic cells, which have DNA, replication starts in only a single location and proceeds until the entire chromosome is copied.
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The Replication process in eukaryotic and prokaryotic cells is quite similar. Almost the same enzymes are involved. 1)eukaryotic, 2)multiple, 3)circular.
What is the prokaryotic DNA replication process?In prokaryotic cells, DNA Replication consists of the unwinding and opening of the double-stranded DNA molecule, a process that starts at the replication origin.
The process is completed in three stages,
⇒ Initiation, in which helicase and topoisomerase are the first enzymes involved.
Helicase works in the replication origin.
It separates the DNA into two strands allowing the replication fork to advance by unwinding the DNA. It breaks hydrogen bonds between nitrogenated bases pairs.Topoisomerase impedes the DNA double helix near the replication forks to get too coiled when the DNA is opening.
⇒ Elongation, in which DNA polymerase I and III, primase, and ligase act,
Polymerase I and III are responsible for DNA elongation.
They are in charge of adding nucleotides to the growing chain, from 3' to 5' extremes. It includes only nucleotides that complement the original strand. They need to recognize a primer to begin. The new chain grows in 5’-3’ directionPrimase is in charge of synthesizing primers.
DNA polymerase I eliminate ARN primers and substitute them with DNA.
DNA ligase seals the gaps that remain after replacing the primers.
⇒ Mistakes correction
Endonuclease cuts the wrong segment
Polymerase I and III are in charge of correcting errors and filling empty spaces.
Ligase seals the corrected extremes.
The prokaryotic replication result is two DNA molecules, each of them carrying an old strand and a new strand.
What is the eukaryotic DNA replication process?
Eukaryotic DNA replication is the process through which DNI molecule duplicates. This event takes place during the S stage of the interphase. So when the cell divides during mitosis or meiosis, each cell will get a complete set of chromosomes.
DNI replication is semi-conservative because each new molecule carries an original DNI strand and a new one. The fact that the new molecule is composed of an original strand makes it semi-conservative. The old existing strands are used to synthesize the new complementary strand.
The main difference concerning the prokaryotic replication process is that in eukaryotic cells there are
5 different polymerase enzymes several replication origins per chromosomeinvolves histonesThe origin of the replication requires
The helicase enzyme breaks hydrogen bonds and separates the two original strands. The topoisomerase enzyme is necessary to release tension. Other proteins are also needed to join the strains and keep them separated.Once the molecule is opened, there is a region named replication forks.
DNA polymerase makes the new nucleotides enter the fork and pairs them with the corresponding nucleotide of the original strand. Adenine pairs thymine, and cytosine pairs guanine.DNA strands are antiparallel, and replication occurs only in 5'-3'direction. So one of the strands will replicate continuously, while the other strain will be formed by short fragments known as Okazaki fragments.
Primers are needed to make the DNA polymerase work. Primers are small units of RNA and are placed at the beginning of each new fragment. These are later eliminated by Polymerase.
Ligase seals the gaps.
Complete sentenses
Before a cell divides, its DNA must be replicated without errors so that the genetic codes for proteins are expressed properly. In eukaryotic cells, which have linear chromosomes, replication occurs in multiple locations and ends when all the chromosomes are copied. In prokaryotic cells, which have circular DNA, replication starts in only a single location and proceeds until the entire chromosome is copied.
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Sorry, but I have another question. What are two organs that humans and grasshoppers have in common?
Answer:
Brain and Heart
Explanation:
Hope this helps :)
The middle ear communicates with the nasopharynx through the.
Answer:
The eustachian tube
Explanation:
Connects the middle ear cavity with the nasopharynx
Kendra is studying the energy pyramid shown. which statement is supported by the energy pyramid? the ecosystem can support fewer foxes than grasshoppers. foxes require less energy than birds. the ecosystem can support more foxes than birds. grasshoppers require more energy than birds.
Ecosystem an area where plants, animals, and other organisms, co-ordinate for their living. According to energy pyramid, ecosystem can support fewer foxes than grasshoppers.
What is energy pyramid?Energy pyramid is the flow of energy from one tropic level to another which is always erect.
After each level, 90% energy is lost in environment as heat. There is loss of energy at each tropic level.
As foxes comes after grasses in energy pyramid, so the ecosystem can support fewer foxes than grasshoppers.
Thus, the correct option is A.
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Fluctuations in the phosphorus cycle in aquatic ecosystems _______. a. can lead to changes in the growth rates of aquatic populations b. are never caused by human impact on the environment c. lead to a decrease in the amount of phosphorus found in sediment d. never occur naturally please select the best answer from the choices provided a b c d
Phosphorous cycle supports the growth of phytoplankton. Fluctuations in the phosphorus cycle in aquatic ecosystems can leads to changes in the growth rates of aquatic populations.
What is phosphorous cycle?Phosphorous cycle describes the phosphorous movement from lithosphere, hydrosphere and biosphere.
Aquatic phosphorus exhibits seasonal cycle. It peaks in spring, causing rapid growth of algae and plant, then decline.
As phosphorus fertilizer aids in the growth of crops, phosphorus supports the growth of photosynthetic organisms like phytoplankton, at the base of the marine food web.
Any fluctuation in this process can leads to changes in the growth rates of aquatic populations.
Thus, the correct option is a.
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Which component of transcribed rna in eukaryotes is present in the primary transcript but is removed before translation occurs?.
Answer: introns (DNA that doesn't code for protiens)
When do humans store fat in their bodies?
Answer:
humans store fat in their stomach
Explanation:
How are chickens and crocodiles alike?
Answer:
Alligators and crocodiles share a more recent common ancestor
Explanation:
05.02 Properties of Light Guided Notes
Objectives:
In the lesson you will:
• explain that light waves can be reflected, refracted, and/or absorbed
• recognize that light waves move in straight lines unless they travel into a transparent material, or medium, which may cause the light wave to bend
• differentiate light waves and matter waves
Big Ideas:
Key Questions and Terms Notes
The way that light waves interact with different mediums is called the ________.
When does reflection occur?
Light reflects off of the medium at a ________ angle to which it initially struck the material. This means that if the light hits a mirror at a 40-degree angle, it will bounce off at a ___ degree angle. Draw a picture of what this looks like.
When does refraction occur?
When light can pass through an object, it is called ________.
When does absorption occur?
Describe how visible light interacts with these materials:
• Mirror:
• Glass of water:
• Dark fabric:
What are some examples of matter waves?
What are some examples of electromagnetic waves?
How are electromagnetic waves different from matter waves?
Would outer space be an ideal spot for a concert? Why or why not?
________ waves need to interact with particles of either a solid, liquid, or gas to travel.
Light Waves and Sound Waves
Record your findings of sound and light waves for each of the following.
• Traveling through air
• Traveling through metal
• Why light travels faster
Answer:
The way that light waves interact with different mediums is called the refraction.
When does reflection occur?: It occurs when light waves collide with a medium, causing the light waves to bounce off. The light reflects off the medium at a similar angle to which it initially stuck the material
Light reflects off of the medium at a 40 degree angle to which it initially struck the material. This means that if the light hits a mirror at a 40-degree angle, it will bounce off at a 40 degree angle. Draw a picture of what this looks like. (you'll have to draw the picture by yourself)
When does refraction occur?: It occurs when light travels through a transparent medium, causing them to bend and change direction. AS the light passes from air into water, it bends.
When light can pass through an object, it is called transmission.
When does absorption occur?: It occurs when light waves strike a medium and are neither reflected or refracted, nor are allowed to pass through.
Describe how visible light interacts with these materials:
• Mirror: Visible white light that is directed onto the surface of a mirror at an angle (incident) is reflected back into space by the mirror surface at another angle (reflected) that is equal to the incident angle, as presented for the action of a beam of light from a flashlight on a smooth, flat mirror.
• Glass of water: The light travels straight through the glass, but the direction it is traveling bends when entering and leaving the object.
• Dark fabric: Dark objects (fabric) absorb those wavelengths, and lighter objects reflect more. The temperature of the black fabrics shown in visible and near-infrared (shown on the left) over time.
What are some examples of matter waves?: Sound waves, waves in a Slinky, and water waves are all examples of this.
What are some examples of electromagnetic waves?: Gamma rays, light waves, wireless waves, & X-rays are examples.
How are electromagnetic waves different from matter waves?: The main difference between electromagnetic waves and matter waves is in the components that make them. Also, there is no need for sound radiation to pass through a medium/requirement to communicate with other particles to travel like waves of matter.
Would outer space be an ideal spot for a concert? Why or why not?: (you can change this depending on your opinion) No, it wouldn't. There is no oxygen up in outer space, as well as gravity to keep the people, as well as the instruments grounded. The likelyhood of floating away is very high, so, as soon as you get there you wouldn't be able to see the concert at all.
Matter waves need to interact with particles of either a solid, liquid, or gas to travel.
Record your findings of sound and light waves for each of the following.
• Traveling through air: The light waves pass thru the air more quickly than sound waves.
• Traveling through metal: Sound waves almost always go through a metal frame.
• Why light travels faster: Light waves travel faster than electrical signals even though they don't have to crash in electromagnetic waves to particles.
Explanation:
I hope this helps! This took forever lol. All of the anwsers are in bold!
Is lamina part of a flower
Yes.
Explanation:
The flat and expanded portion of the leaf in its entirety is known as the lamina. In short, the blade of the leaf or the leaf blade is called the lamina of a leaf.
Answer:
the definition of Lamina is "a thin layer, plate, or scale of sedimentary rock, organic tissue, or other material."
So No a Lamina is not apart of a flower. Ihope this is correct and you get a good grade
Explanation:
3) An abundance of liquid water is unique to planet Earth. Why is it not common on
other planets in our solar system? Write your answer below in complete sentences.
Answer & Explanation:
The reason that only the Earth has liquid water is that all the other planets and moons are either too hot, and whatever water is there boils away, or they are too cold, and whatever water is there freezes.
Earth has created a type of atmosphere in a type in which the abundant amount of needs that every human needs is present. Nearly 70% of the land is covered with water.
What is the name of the nearest planet to Earth ?It is the mars that shows many similarities in the atmosphere with the living conditions as of Earth.
Both of the atmosphere of Mars and of Venus are usually made of the carbon dioxide. Neither planet's own atmosphere is containing any amounts of oxygen for speaking of that is which means that in the present situation it is not possible to breathe on either planet.
The earth is unique in the solar system planet because the Conditions that are favorable to the supporting of life that are only to be found on the earth. The planet is neither too hot nor too cold. Here the resources as water and air in it which are almost important for the survival.
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What region of a root has the most mitotic activity.
Answer:
the meristematic region
Explanation:
this root is a tip and very actively growing region all the time
In what part of the digestive tract does most nutrient absorption occur?.
Answer:
The small intestine
(It is most likely this because the large intestine absorbs water, the liver secretes bile, the pancreas secretes hormones, and the stomach breaks down the food).
BONUS: The small intestine has vili to increase the surface area of nutrient absorption.
Answer:
the small intestine
Explanation:
khan
PLEASE ANSWER FOR BRAINLIST!! I BEG!!!
What is the role of oysters as a sustainable food source?
Oysters filter 50 gallons of ocean water a day.
Zero inputs are needed to grow oyster populations.
Oysters reducing ocean acidity by removing nitrogen.
Shellfish sequester more carbon than land-based plants.
Answer:
Oysters filter 50 gallons of ocean water a day.
Explanation:
Oysters are the engineers of the ocean. They help clean and filter the ocean water and they help build sustainable habitats for other species to live in. To now completely back up this answer an adult oyster can filter as much as 50 gallons of water a day.
Answer:
The answer is B: Zero inputs are needed to grow oyster populations.
Explanation:
I took the test and got it correct!!
There are a number of ways a protein can be denatured.
a. True
b. False
Answer:
A. True
Explanation:
hope this helps :)
Muscle fibers which preform vigorous exercise to form a great percentage of ____
A) pyruvic acid
B) lactic acid
C) citric acid
D) acetic acid
Muscle fibers which preform vigorous exercise to form a great percentage of lactic acid because of the occurance of anaerobic respiration.
What is anaerobic respiration?Anaerobic respiration is the production of energy from glucose in the absence of oxygen. The products of anaerobic respiration are lactic acid, carbon dioxide, and water.
So we can conclude that Muscle fibers which preform vigorous exercise to form a great percentage of lactic acid because of the occurance of anaerobic respiration.
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Which is not something that occurs in translation?
Answer:
'Production of mRNA'
Explanation:
B. Determine the possible phenotype for each given genotype.
1. Yellow (Y) is dominant to green (y)
a. YY
b. Yy
c. yy
Answer:
1. Yellow
2. Yellow
3. Green
Explanation:
Y is dominate so y will always be dominated if paired with Y, but if it is two recessive phenotypes (yy) it will be green
HELPPP Riddle: Who am I? You may have seen my latest blockbuster movie. It's playing now
in underwater theaters. I am a
_ _ _ _ _ _ _.
Explanation:
the answer will be sea star
Answer:
A Sea Star
Explanation:
Hope this helps!
The pontine storage center controls micturition by:.
The pontine storage center controls micturition by reducing detrusor muscle function and increasing the contractions of the external urethral sphincter.
What is the pontine storage center?The pontine storage center is a contraction reflex that promotes continence during bladder filling.
The pontine storage center is a center found in the medial dorsal pons (rostral pontine tegmentum).
This center (pontine storage center) is well known to play a role in the inhibition of the micronutrition reflex.
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Why are cotyledons green in beans but not in corn?.
Answer:
Because of the sunlight. When cotyledons are exposed to light, because of the reflectants, they look green. This is because beans reflect the sun's blue and red UV rays, which makes them green.