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vivado [14]
3 years ago
14

Cells are surrounded and protected by

Biology
1 answer:
riadik2000 [5.3K]3 years ago
7 0

Answer:

Plasma membrane or cytoplasm

Explanation:

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An example of negative feed back mechanism is when an increased blood levels of estrogen and testosterone will decrease the leve
ElenaW [278]

Answer:

The correct answer is - True.

Explanation:

The negative feedback loop of the endocrine system is that when a hormone is inhibited by its own mechanism or its products. The negative feedback mechanism in the blood is when the level of testosterone and inhibin inhibit the release of the GnRH, LH, and FSH. The low level of GnRH, LH, and FSH affects spermatogenesis and ovulation in males.

In females, the high levels of estrogen and the progesterone exhibit the negative feedback hormone prevents LH and GnRH production by acting on the hypothalamus and inhibit ovulation.

Thus, the correct answer is - True.

6 0
4 years ago
Which types of molecules make up the majority of a cell's plasma membrane?
Dmitriy789 [7]
The answer is B: proteins and lipids.
Also carbohydrates
5 0
4 years ago
What is air pressure? At what elevation is air<br> pressure the highest? Why?
Step2247 [10]

Answer:

With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude. On top of Mount Everest, which is the tallest mountain on Earth, air pressure is only about one-third of the pressure at sea level.

5 0
3 years ago
MULTIPLE CHOICE
adoni [48]

Answer:

B

Explanation:

Its 23 in mitosis cell division

8 0
3 years ago
Sister chromatids separate (and are now called chromosomes) and begin to move toward the poles of the cell. This happens in
NeX [460]

Answer:

sister chromatids separate and begin to move towards the pole of the cell during anaphase.

6 0
4 years ago
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