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Darina [25.2K]
1 year ago
13

When a neuron is activated by a stimulus, its plasma membrane will change until it reaches a membrane potential of about 40 mV.

What is special about this value
Biology
1 answer:
grandymaker [24]1 year ago
7 0

Answer: It is approximately the membrane potential at which the electrochemical gradient for Na+ is zero.

Explanation:

The charge in plasma membrane occurs with diffusion and electric fields.

For example, if there are two solutions, let's assume solution X and Solution Y are separated by a porous barrier (to diffuse in equal proportions).

The fundamental principle of diffusion states that solution from a high concentration diffuses to a lower concentration.

For instance, if the X solution contains 40 sodium ions and 40 chloride ions, the Y solution only has 30 sodium and 30 chloride ions. Due to the diffusion, these two solutions will mix and reach a steady-state.

The like charges repel, and opposite charges attract.

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Feathers are modified ______.<br> a. scales<br> c. lipids<br> b. hair<br> d. tibia
Anuta_ua [19.1K]
Feathers are modified as scales. According to the history, birds which have feathers are the descendants of the dinosaurs which have scales.
That's why feathers are categorized as scales in the present record according to studies. <span />
6 0
3 years ago
Lipids and carbohydrates differ in which of the following fundamental respects?
Schach [20]

Answer:

Carbohydrates are hydrophilic  whereas Lipids are hydrophobic.

Explanation:

Carbohydrates can be most commonly understood as hydrates of carbons. They generally contain more than two carbon atoms and are easily soluble in water, thus giving them the characteristics of hydrophilic compounds. Sugar and glucose are some of the important examples of carbohydrates.

On the other hand, lipids comprise a polar region, which attracts water and a much larger non-polar region, which repels water. This non-polar region dominates the polar region of lipid molecules thus making it a hydrophobic compound. Oils, fatty substances, steroids, and waxes are some of the important examples of Lipid molecules.

8 0
3 years ago
Need all the answers will give 5 stars.
bulgar [2K]

Answer:

1. "a, O, and J"

2. "R and C"

3. I'm not entirely sure about #3, but I believe the answer is "d and R"

4."J, K, I, M, N"

5. "d"

6. "I" explain why: "It is at the bottom, so it is therefore the oldest."

7. "Q" explain why: "It is at the top, so it is therefore the youngest."

8. The folding occured before the faulting. Why? Because the folding is evident in the second half of the fault.

<u><em>DISCLAIMER: any of these answers could be wrong. I did my best but I am still human.</em></u>

7 0
2 years ago
These individuals had theories of evolution by natural selection, but did not receive the same credit that Darwin did: Group of
Sergeeva-Olga [200]

The individual who did not receive the same credit as Darwin was Alfred Russel Wallace.

<h3>What is the evolution theory?</h3>

The evolution theory is a scientific theory explaining how natural selection may change (evolve) phenotypes across generations.

Alfred Russel Wallace was an evolutionary biologist who understood the importance of natural selection on this process.

In conclusion, Alfred Russel Wallace did not receive the credit as Darwin.

Learn more about natural selection here:

brainly.com/question/23929271

#SPJ1

7 0
1 year ago
A specialized fleshy stem used for food storage and reproduction is a _____.
notsponge [240]

Bulb is the answer because they are very short underground stem encased in thickened fleshy bulb scale.This scale help to store food


THANK YOU

MAKE ME THE BRAINEST!!


3 0
3 years ago
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