What is the feature of the cell membrane that causes it to be able to "choose" what materials enter and exit?

1 answer:

6 0

Cell membranes are semi-permeable. That is why they can allow only some substances to enter the cell. It basically depends on the size of the molecules. Smaller atoms like water can easily pass through. However, macromolecules such as sugars, oils and proteins cannot easily pass because they contain a long chain of monomers.

You might be interested in

The Moon is 240,000 miles away from the Earth. What prediction can

sergiy2304 [10]

Answer:

The closer the moon the higher the tides. The further away the moon is, the lower the tides will be

Explanation:

7 0

2 years ago

Read 2 more answers

Define cell conjunctions

tamaranim1 [39]

It means that two or more cells connected together.
You can look at the word 'cell' and 'conjunctions' separately. 'Cell' is a tiny particle. 'Conjunctions' means 'two or more things connected', so just put the two meanings together.
Hope this helps. :)

8 0

3 years ago

This diagram shows the menstrual cycle.

LiRa [457]

Answer:

According to the hormone diagram of the menstrual cycle, the woman is not pregnant due to the behavior of progesterone and estrogens, whose levels do not increase, in addition to the absence of human chorionic gonadotropin.

Explanation:

The graph shows the behavior of hormones during a woman's menstrual cycle in the absence of pregnancy.

During a woman's normal cycle, estrogen, luteinizing hormone (LH) and follicle stimulating hormone (FSH) tend to increase prior to ovulation, reach their peak values at ovulation, and then decline, as shown in the graph. Progesterone, on the other hand, increases after ovulation and decreases if the woman does not become pregnant.

In the case of a pregnant woman:

Estrogens continue to increase after ovulation, produced by the ovaries and placenta.
Progesterone also increases its levels, as it is a hormone produced by the ovaries and placenta.
Hormone human chorionic gonadotropin (HCG) appears and increases during pregnancy, due to the secretory activity of the placenta.

The diagram represents the normal cycle of a woman who is not pregnant.

4 0

2 years ago

Autonomic nervous system reactivity in humans appears to be ____.

ad-work [718]

Here is the answer that would best complete the given statement above. Autonomic nervous system reactivity in humans appears to be explaining the acquisition of phobias and other human behaviors. Hope this is the answer that you are looking for. Have a great day ahead!

4 0

2 years ago

Which structure transport water and nutrition from the roots to the rest of the plants?

sineoko [7]

Answer:

The structure of plant roots, stems, and leaves facilitates the transport of water, nutrients, and photosynthates throughout the plant.

Explanation:

7 0

2 years ago