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madreJ [45]
3 years ago
8

What is the first step in triggering a change in membrane potential?

Biology
1 answer:
Sophie [7]3 years ago
4 0

Answer:

The membrane potential is maintained in the cell due to the unequal distribution of the ions inside and outside of the cell. This membrane potential is important for the conduction of the nerve impulse.

The arrival of the stimulus triggers the action potential. The resting membrane potential is -70mV. This is maintained by the presence of potassium ions. The influx of the sodium ions result in the change in the membrane potential from -70mV to +30mV.

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Cells in a monkey undergo both mitosis and meiosis. How many chromosomes do cells 1 and 2 have?
elena55 [62]

Answer: b

Explanation: Mitosis produces 2 cells where has meiosis produces 4 and 2 is half of 4

(plus I just took a test with this question)

4 0
3 years ago
An online article that your professor asked you to critique states that African Americans cannot contract malaria, even if they
motikmotik

Answer:

The answer is B.

Explanation:

Regarding the situation explained in the question that "African Americans are not affected by the malaria disease because of a specific genetic trait that they possess and that trait provides them with protection" can be explained by the answer given in option B.

Being heterozygous, meaning possessing a dominant and a recessive allele regarding that genetic trait, in terms of sickle cell trait which is a gene that causes the individual's blood cells to be sickle shaped and balanced polymorphism which means carrying two different versions of a gene is an argument that is enough to prove that the above statement is incorrect because it means they have blood cells that can be affected by the malaria disease.

I hope this answer helps.

6 0
3 years ago
Must all ecosystems have quaternary consumers? Why or why not?
julsineya [31]
Yes, all ecosystems need to have a top predator (quaternary consumers) so that the cycle of the food chain can stay complete. 
8 0
3 years ago
1. Explain why the greenhouse effect is necessary but how an enhanced greenhouse effect can harm the planet.
LiRa [457]

Answer:

1. The enhanced greenhouse effect disrupts the Earth's climate equilibrium and has led to an increase in the global average surface temperatures.

2. Scientists attribute the global warming trend observed since the mid-20th century to the human expansion of the "greenhouse effect"   1 — warming that results when the atmosphere traps heat radiating from Earth toward space. Certain gases in the atmosphere block heat from escaping.

3. Greenhouse gases absorb some of the energy and trap it in the lower atmosphere. Less heat radiates into space, and Earth is warmer. ... Carbon dioxide, methane, water vapor, and nitrous oxide are naturally present in Earth's atmosphere.

4. Carbon sequestration is the process of capturing and storing atmospheric carbon dioxide. It is one method of reducing the amount of carbon dioxide in the atmosphere with the goal of reducing global climate change.

5. As climate change caused by burning fossil fuels drives temperatures higher, the ocean warms, causing it to expand. ... Scientists have found that water draining from melting glaciers and ice sheets in polar and mountain regions is now also contributing to this rise in sea levels.

4 0
2 years ago
Read 2 more answers
Fill in the bubblegram with words related to plant and
prisoha [69]

Answer:

5

Explanation:

because I took that test or wuiz

6 0
3 years ago
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