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ira [324]
3 years ago
14

The human body has natural steroids, a type of lipid. What is the function of steroids in the human body? A. They store extra en

ergy in the body. B. They build cell membranes. C. They carry chemical messages throughout the body. D. They prevent water loss from the body.
Biology
1 answer:
a_sh-v [17]3 years ago
7 0
The answer is D hope this helped u
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3 years ago
Why are scientists interested in the origin of organic molecules?<br><br> help me please...
valentina_108 [34]

Answer:

Gas from Earth's core came to the surface through volcanoes.

Recent hypotheses about the origin of organic molecules suggest that these molecules may have formed in hydrothermal vents deep in the oceans, where hot gases and elements emerge from cracks in Earth's crust.

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7 0
3 years ago
Which of the following characteristics are true for an action potential?
pickupchik [31]

Answer:

I, II, III

Explanation:

A threshold stimulus is a stimulus that is capable to produce a response in excitable tissues such as neurons and muscle fibers. At threshold potential, the outward movement of K+ and inward movement of Na+ become equal to each other. When the potential exceeds the threshold potential, more and more Na+ enter the cell to depolarize it and to allow the opening of Na+ channels. Therefore, to fire an action potential, the threshold must be exceeded.

Conduction of action potential is all or none phenomenon which means that either it occurs or it does not occur. As an impulse is passed by each successive part of an exon, it enters the refractory period during which there is no conduction of nerve impulse. It ensures the one-way conduction of impulse from the cell body to the axon terminal only.

6 0
3 years ago
Which system prepares the body for the situation described in the scenario
hoa [83]

Answer:

It’ll be answer D

Explanation:

Just did it on edg 2020 it’s right

4 0
3 years ago
As DNA replication continues and the replication bubble expands, the parental double helix is unwound and separated into its two
liberstina [14]

Answer:

A. Helicases

B. Single strand binding proteins

C. Single strand binding protein

D. Topoisomerases

Explanation:

The helicases bind on the replication fork aiding in the unwounding of the DNA helix to allow for replication. The single strange binding proteins attach/bind to the separated single stranded DNA after the replication fork to prevent re-annealing of the single stranded DNA preventing Hydrogen bond formation that reanneals these two strands together. The topoisomerases are found just ahead of the replication fork preventing overwounding/ positive supercoils of the DNA. They do this by introducing breaks into the phosphate backbone of the DNA allowing them rotate forming negative supercoils and attaching the breaks once the DNA strand is relaxed.

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3 years ago
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