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Pepsi [2]
3 years ago
13

Which of the following enables a cell to pick up and concentrate a specific kind of molecule?

Biology
1 answer:
alex41 [277]3 years ago
5 0

The correct answer is option 4

Receptor mediated endocytosis is an endocytotic mechanism which involves ingestion of foreign molecules into the cell. It forms a receptor-ligand interaction. The receptors bind to the targetted  ligands on the outside of the cell

Receptors on the plasma membrane of the target tissue will specifically bind to ligands on the outside of the

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As part of maintaining homeostasis, why are hormones, secreted by endocrine cells, continuously inactivated?
IceJOKER [234]

Answer:

Homeostasis refer to as the maintainence of equillibrium within the body. Endocrine systems play a major role in maintainence of equillibrium. The hormones released are continuously inactivated by negative feeback system to maintain homeostsis.

Explanation:

Homeostasis in a body is refered as a dynamic equillibrium which constantly changes. Feedback regulation systems maintain homeosatsis.

The release of hormones into the blood is controlled by a stimulus. A stimulus can increase or decrease the release of hormones.The response to a stimulus changes the internal conditions and may itself become a new stimulus. This self-adjusting mechanism is called feedback regulation.

There are two types of feedback systems.

Negative feedback occurs when the response to a stimulus reduces the original stimulus. Positive feedback occurs when the response to a stimulus increases the original stimulus.

If the hormones released are not controlled by these feedback systems, enormous amount of hormones will change the whole internal enviornment of the body ,hence, equillibrium will be disturbed and result in death of cells and death of an indivisual.

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3 years ago
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It would be fossil fuels
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Molecules may be assembled into a microscopic structure called a(n) blank which carries out specific functions within a cell.
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Cells are combined in a structure called tissue wich have the same properties like the cells wich are formed by.
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