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Bad White [126]
3 years ago
10

What happens to the blood vessels in hot and cold weather?

Biology
2 answers:
attashe74 [19]3 years ago
8 0
Blood vessels expand during hot weather and retract/ tighten in cold weather
iren [92.7K]3 years ago
3 0

When temperatures hit 50 degrees, your blood vessels narrow to reduce blood flow near the body's surface. Sometimes the blood vessels dilate and burst, which causes redness.

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Explain how the release of sodium and chlorine would lead to a loss of water in the intestines
frosja888 [35]

Answer:

Please find the explanation below

Explanation:

Sodium (Na) and Chlorine (Cl) are two electrolytes that play important role in the absorption of water and nutrients in the small intestine. However, as mentioned in the question, the release of sodium and chlorine would lead to a loss of water in the intestines. This is because of the OSMOTIC phenomenon.

Osmosis is the movement of water molecules from a region of high concentration of water/low concentration of solute to a region of low concentration of water/high concentration of solute via a semipermeable membrane. In this case, the Na+ and Cl- ions serve as the solutes, which when released out of the intestine causes the solution in the intestines to be HYPOTONIC compared to the intestinal environment. This causes an OSMOTIC GRADIENT.

This osmotic gradient i.e. difference in concentration provokes osmotic flow of water from the intestines, which has a low solute/high water concentration, to the outside of the intestines, which has a high solute/low water concentration. Hence, water is lost from the intestine because the solute concentration becomes low when sodium and chlorine ions are released.

3 0
2 years ago
_______ is a technique that uses the images from several telescopes to produce a single image.
vesna_86 [32]
<span>The technique that uses the images from several telescopes to produce a single image is called 'Astronomical interferometery. By combining images from several telescopes, it is possible for astronomers to create detailed images with high resolutions. </span>
5 0
3 years ago
Natural selection is a process by which organisms that are better adapted to their environment tend to
ddd [48]

The correct  answer is D

4 0
3 years ago
Read 2 more answers
PLEASE HELP: fill in the blanks
Verdich [7]

1) metaphase 1, metaphase 2

3) meiosis, half

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6 0
3 years ago
Pls help &lt;3 How can two parents with brown eyes produce an offspring with blue eyes?
Yuki888 [10]

Answer:

A is the answer.

Explanation:

Recessive traits don't show unless both parents have at least one allele for that trait, so if both parents do have 1 allele, the offspring would receive a pair of alleles for that specific trait and would display that trait.

6 0
2 years ago
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