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Softa [21]
3 years ago
7

The main function of the respiratory system is to do what?

Biology
1 answer:
nalin [4]3 years ago
8 0
The main part of the respiratory system is the lungs; the lungs are a place where oxygen can enter the blood, and the carbon dioxide leaves the blood. The correct answer is here:
<span>
C. To exchange gasses between the blood and the environment.</span>


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How does the structure of a nephron directly relate to function of the kidney
VLD [36.1K]
Nephrons are the filtering structures of the kidneys. The kidneys contain millions and millions of these tiny filtering structures that are responsible for cleaning the blood. Nephrons are responsible for removing excess water, wastes, and other substances in the blood that are not needed by the body. They also return necessary substances (e.g. sodium, potassium, phosphorus) whenever the body runs low in supply.  

If these nephrons are damaged, blood will not be properly filtered. As a result, the kidney will have different diseases and this might lead to kidney and multiple organ failure.       <span> </span>
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3 years ago
Is it<br> A. True<br> B. False
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Letter A. This is true it is caused from bacteria on the skin.
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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:

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

<em><u>The diagram represents the normal cycle of a woman who is not pregnant</u></em>.

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3 years ago
What substance in the esophagus lining helps make swallowing easier?
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c. mucus

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Process in which chemical energy, instead of sunlight is used to make food
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Chemosynthesis, I believe. Bacteria at the bottom of the ocean use this process for food.
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