Name three components of the cell membrane and explain how each contributes the semipermeable nature of the membrane.

Answers

Answer 1

The principal components of the plasma membrane are lipids ( phospholipids and cholesterol), proteins, and carbohydrates. The plasma membrane protects intracellular components from the extracellular environment. The plasma membrane mediates cellular processes by regulating the materials that enter and exit the cell.


Related Questions

A key limitation of the coefficient of community is that it lacks the ability to:

Answers

Answer:

calculate the similarity between two communities.

Explanation:

A population of 200 mice contains 168 brown mice. Brown is dominant to gray. How much of the population would be h e t e r o z y g o u s?
A. 32%
B. 84%
C. 48%
D. 16%

Answers

The answer is B, yo welcome

The heterozygous population in the population of 200 mice is 84%. The correct option is B.

What is heterozygous?

Heterozygous means having two types of alleles for the same type of gene. These alleles show two types of characters for a single gene. An example is a person having an allele of brown and black hair.

The population is 200 of which 168 mice are brown

By the Hardy–Weinberg (HW) equilibrium

q² (bb) = (200 - 168) /200 = 32 / 200 = 0.16

q: √ 0.16 = 0.4

p = 1 - q = 1 - 0.4 =  0.6

p² (BB) = 0.6 x 0.6 = 0.36

Thus, the correct option is B. 84% regarding the heterozygous population.

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pls help asap I'll mark brainliest​

Answers

Answer:

water then carbon diaxide  and oxygen

Explanation:

Answer:

Light energy + Water + Carbon Dioxide to leaf to sugar + Oxygen

Explanation:

This is called photosynthesis. Hope it helps

below is a view at 1000x magnification of a gram stain of the cerebrospinal fluid. what type of white blood cell predominates in charlie’s csf?

Answers

The type of white blood cell that predominated in charlie's CSF is neutrophils.

Cerebrospinal fluid (CSF) is a transparent, colorless plasma ultrafiltrate with little protein and few cells. It is produced in the choroid plexus in the ventricular brain system.

The type of white blood cell that predominated in charlie's CSF is neutrophils. They are granular leucocytes, with active phagocytes. In the cytoplasm, there is the presence of neutral staining granules whose phagocytic activities are integral to subdue the invasion of pathogens.

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the small bones in the middle ear that transmit vibrations to the inner ear

Answers

Answer:

, yes..............

Explanation:

because the vibrations are transmitted to the inner ear after the bones amplify it

Ossicles are the body's tiniest bones. the malleus (hammer), incus (anvil), and stapes (stirrup). Ossicles amplify sound. 

What are ossicles?

Ossicles are very little bones; in fact, they are the tiniest bones in the entire human body. The malleus (hammer), the incus (anvil), and the stapes are the names of the three bones because of the forms they make (stirrup). The sound is amplified even further by the ossicles.

In order to reach the eardrum, sound waves must first enter the outer ear and then proceed via the ear canal, which is a very short conduit. The incoming sound waves cause the eardrum to vibrate, and the eardrum in turn transmits these vibrations to three very small bones located in the middle ear. The malleus, incus, and stapes are the names given to these three bones.

Hearing is dependent on a series of intricate steps that convert sound waves in the air into electrical impulses. These steps are necessary for hearing.

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14.

a) Find m
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B
C
:
degrees

b) Find m∠CED:
degrees

c) Find m
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C
E
D
:
degrees

d) Find m
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C
D
E
:
degrees

Answers

I also have the same problem

SOMEONE PLEASE HELP

What is the major consideration in setting the lower limit of cell size?
A. The cell size must be small as to fit all the processes and structures to support life.
B. The cell must be large enough to fight the pathogens.
C. The cell must be large enough to attach to a substrate.
D. The lower limit should be small enough for the cell to move in the fluid efficiently.

Answers

Answer:

c

Explanation:

The lower limit should be small enough for the cell to move in the fluid efficiently. Therefore, option (D) is correct.

The major consideration in setting the lower limit of cell size is the need for the cell to move in fluid efficiently. As cells become smaller, their surface area-to-volume ratio increases, allowing for more effective exchange of nutrients, gases, and waste products across their membrane.

This is particularly important for cells living in fluid environments where diffusion plays a crucial role in these exchanges. Small cells have an advantage in absorbing and expelling substances due to their larger surface area relative to their volume. Therefore, the efficiency of nutrient uptake and waste removal becomes more effective with smaller cell sizes, making efficient movement in fluid environments a significant factor in determining the lower limit of cell size. Thus, option (D) is correct.

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From your experiments, you conclude that the mosquitofish are already
consuming too much oxygen from the pond. Any added goldfish are
suffocating.
You have estimated that the Elodea currently in your pond produce 22.8 mL of
oxygen per hour.
A2 gram goldfish will need 6.2 mL oxygen per hour. A small 0.5 gram
mosquitofish will need 2.2 mL of oxygen per hour.
Determine how many mosquitofish and goldfish the pond can support.

Answers

Answer:

You can have 2 goldfish and 4 mosquitofish as the most balanced answer.

Explanation:

Define negative feedback in biology

Answers

Answer:

A negative feedback loop occurs in biology when the product of a reaction leads to a decrease in that reaction. In this way, a negative feedback loop brings a system closer to a target of stability or homeostasis

Explanation:

Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances

HELP PLEASE SHOW WORK

1. How many grams are there in 2.3 moles of C?


2. How many moles are there in 43 grams of aluminum?


3. How many atoms are there in 100.5 moles of U?


4. How many moles are there in 6.818 x 10 26atoms of Ne?

Answers

Answer:

1. 46grams

2. 5moles

3. 476 atoms

4. 6,995,268

Which of the following is associated with plates moving away from each other? a. Rifts b. Subduction zones c. Faults d. All of the above.

Answers

Answer:

a. Rifts

Explanation:

A fault (c) happens at all plate boundaries, so while this is true, it is not the most correct. A subudction zone (b) is where Earth's tectonic plates dive down into the mantle, so this does not answer our question. A rift, in general, is a crack, split, or break in something. A rift in plate tectonics is when plates are moving apart from each other, caused be tension, so a is our answer.

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

A

Explanation:

the answer is A

When Emma first began dancing, her movements were ______ and awkward. Now, after several months of practice, Emma is able to produce fluid, smooth movements as a result of which of the following?

*all of the above is correct

Answers

Answer:

All of the above is the correct answer

Explanation:

What is metastasis and what body systems are involved in the process?

Answers

Answer:

Metastases most commonly develop when cancer cells break away from the main tumor and enter the bloodstream or lymphatic system. These systems carry fluids around the body.

Explanation:

In metastasis, cancer cells break away from where they first formed, travel through the blood or lymph system, and form new tumors in other parts of the body.

Give an example of display behavior exhibited by a territorial animal.

Answers

Answer:

Agonistic (aggressive) displays usually occur near the borders of a territory. When a strange howler monkey approaches the territory of others, resident males set up a tremendous din, warning the intruder off. Many songbirds sit on highly visible perches while singing, providing both auditory and visual displays.

How can scientists use half-life to help date new rocks and fossils that are found?

Answers

Answer:

radioactive isotopes of elements decay

Explanation:

As radioactive isotopes of elements decay, they lose their radioactivity and become a brand new element known as a daughter isotope. ... The half-lives of several radioactive isotopes are known and are used often to figure out the age of newly found fossils.

compared to parasympathetic ganglia, sympathetic ganglia are __________.

Answers

Compared to parasympathetic ganglia, sympathetic ganglia are autonomic ganglia of the sympathetic nervous system that prepare the body for emergency situations, such as: defense or flight reactions to a dangerous situation.

In the parasympathetic ganglia, the axons of neurons are characterized by being very long and reach the very structure of the target organ before making contact with the second neuron.

On the other hand, these ganglia activate the parasympathetic system that has to do with energy recovery situations such as: activating digestive secretions, reducing blood flow to the brain, which causes drowsiness.

In the sympathetic ganglia, axons originate from neurons located in the lateral horns of the spinal cord and exit through the anterior roots of the spinal nerves, along with those of the motor neurons.

These ganglia activate the sympathetic system that prepares the body for dangerous situations causing: increased heart rate, blood pressure, respiratory rate, etc.

Therefore, we can conclude that compared to parasympathetic ganglia, sympathetic ganglia are autonomic ganglia of the sympathetic nervous system that prepare the body for emergency situations.

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Which layer of the atmosphere is experiencing this storm?

Answers

Answer:

Troposphere

Explanation:

Almost all weather occurs in the lowest layer of the atmosphere, called the Troposphere. The exception being large storms like hurricanes and large Thunderstorms. These storms have clouds with great vertical development and the tops of these storms go into the Stratosphere.

What diagnostic test is useful for detecting hyperactivity of the thyroid gland during an evaluation of a thyroid disorder

Answers

Answer:

Blood tests that measure thyroxine and thyroid-stimulating hormone (TSH) can confirm the diagnosis. High levels of thyroxine and low or nonexistent amounts of TSH indicate an overactive thyroid. The amount of TSH is important because it's the hormone that signals your thyroid gland to produce more thyroxine

Explanation:

Why do cells need to use active transport? Give one example of how cells use active transport.

Answers

We need active transport to move things against a concentration gradient. An example is moving amino acids along human intestinal tract.
An example in plants is active transport of mineral ions into root hair cells

True/False: In a neuron at rest, the concentration of sodium ions is 14 times higher outside the cell than inside the cell.

Answers

Answer:

true

Explanation:

The sodium and chloride ion concentrations are lower inside the cell than outside, and the potassium concentration is greater inside the cell. These concentration differences for sodium and potassium are due to the action of a membrane active transport system which pumps sodium out of the cell and potassium into it.

This is a fill in the blank question. Please Help!!

Solid waste is disposed through the __

a. Rectum

b. Liver

c. Anus

(P.S this is a Science question for 13 points!!)

Answers

Answer:

i believe the answer is c.

Based on cell theory, which of these answer choices would describe one reason a virus is considered nonliving?

Answers

Answer:D

Explanation:

I just did it

What two elements make up the majority of the Earth's atmosphere?

Answers

Answer:

nitrogen and oxygen

Explanation:

Nitrogen and oxygen account for 99 percent of the gases in dry air, with argon, carbon dioxide, helium, neon, and other gases making up minute portions.

PLEASE HELP ANY ANSWER WILL DO PLEASEEEE PLEASE
Draw a tree diagram for the dichotomous key that you used for the aliens.

Answers

Answer:

Explanation:

A fishing method called, ____ fishing, is used to catch surface-dwelling species such as tuna, mackerel, anchovies, and herring, which tend to feed in schools near the surface or in shallow areas.

Answers

Answer:

purse-seining

Explanation:

if you need explanation,comment so

One function of the nervous system is to maintain ____________________, or stability within the body

Answers

Answer:

Answer: Maintain body homeostasis with electrical signals.

Explanation:

Your nervous system is your body's command center. Originating from your brain, it controls your movements, thoughts and automatic responses to the world around you. It also controls other body systems and processes, such as digestion, breathing.

Many bacteria exist as free-living cells until a critical number of cells have been produced. Once these large numbers of cells are present in an environment, they may begin to form a biofilm. What characteristic must these cells possess in order for a biofilm to be initiated

Answers

Answer:

I believe they need a suspended counterpart by generation of an extracellular polymeric substance.

Explanation:

How does a frog survive in water as well as on land?

Answers

An amphibian can live both on land and in water. ... Instead of drinking water, frogs soak the moisture into their body through their skin. Frogs breathe through their nostrils while also absorbing about half the air they need through their skin.

Hope this helps :) - sorry if I am wrong - if I am right can I get brainliest please??

Which structure gives you voluntary control over urination?

Answers

Answer:

d. External urethral sphincter

Explanation: is correct. post protected

fast helpppppp

Which characteristic of living organisms is responsible for the production of oxygen in the leaf of a plant exposed to sunlight?

A. excretion
B. movement
C. nutrition
D. respiration

Answers

Answer:

Nutrition

Explanation:

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