The brain is most active during which portion of each sleep cycle? A. the beginning of each sleep cycle B. the middle of each sleep cycle C. the end of each sleep cycle D. The brain is not active during the sleep cycle.

Answers

Answer 1

Answer: I think the correct answer from the choices listed above is option B. It is during the middle of each sleep cycle that the brain is most active. At this point. our breathing becomes more rapid, irregular, and shallow, our eyes move rapidly in various directions, and our limb muscles become temporarily paralyzed. Our heart rate increases and our blood pressure rises. Hope this helps.

Answer 2

Answer:

Answer:

Explanation:

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The chemical process for respiration

Answers

In a scientific sense, a chemical process is a method or means of somehow changing one or more chemicals or chemical compounds. Such a chemical process can occur by itself or be caused by an outside force, and involves a chemical reaction of some sort.

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or

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Biodiversity is valuable partly because ita. gives us interesting things to look at.
b. tells us about many other species.
c. contributes to medicine and agriculture.
d. provides humans with resistance to disease

Answers

The correct answer is C.

Which of the following is considered to be the most significant cause of erosion?a. water
b. ice
c. wind
d. glaciers

Answers

water is the main cause of the erosion in the earth

How many planets are in the Earth's solar system?A. 5
B. 6
C. 7
D. 8
Please select the best answer from the choices provided
A
B
С
D

Answers

Answer:

the answer is D 8 planets

Answer:

the answer is 8

Explanation:

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In nerve cells the sodium-potassium pump is used to generate gradients of both sodium and potassium ions to propagate electrical signals that travel along nerves. This is a(n) A) example of phagocytosis. B) active transport mechanism. C) passive transport mechanism. D) example of movement with the concentration gradient.

Answers

its b active transport

active transport .................................... B

Which of the following explains the inversion of the aquatic pyramid of biomass?a.
high phytoplankton turnover rate
b.
slow aquatic predator metabolisms
c.
small number of aquatic consumers
d.
high energy content of phytoplankton

Answers

its not C. i took he test and got A.

Answer:

A is correct!

Explanation:

As the person above me says C is incorrect.

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