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vfiekz [6]
3 years ago
7

Which of the following factors does not affect membrane permeability?A) The polarity of membrane phospholipids.B) Temperature.C)

The amount of cholesterol in the membrane.D) The saturation of hydrocarbon tails in membrane phospholipids.
Biology
1 answer:
lapo4ka [179]3 years ago
3 0

The correct answer is: A) The polarity of membrane phospholipids

Factors that affect membrane permeability are

1. Chemicals :

Some of the organic solvents such as chloroform and ethanol can dissolve the membrane and thus, destroy the selective permeability of the membrane.

2. Temperature :

Too high temperatures denature the protein that are in the structure of the membrane destroying its selective permeability. On the other hand, too low temperature slows down molecule movements and the permeability decreases.

3. Cholesterol:

Increases the permeability by reducing the barrier formed by phospholipids’ heads

4. The saturation of hydrocarbon tails in membrane phospholipids:

Saturated fatty acids decrease permeability of the membrane because  they get very close together, which makes it harder for the molecules to pass through.

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What is the function of the nervous system? What is the basic unit of the nervous system?
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Illustration of the architecture of a neuron, including the cell body, nucleus, dendrites, axon, myelin sheath, node of Ranvier, synapses, and axon terminal. ( the photo with the answer )  

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The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

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The nervous system also includes non-neuron cells, called glia . Glia perform many important functions that keep the nervous system working properly. For example, glia:

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4- Repair neurons and help restore neuron function

5- Trim out dead neurons

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The brain is made up of many networks of communicating neurons and glia. These networks allow different parts of the brain to “talk” to each other and work together to control body functions, emotions, thinking, behavior, and other activities.

Explanation:

5 0
3 years ago
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The answer would be:

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Explanation:

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