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Margaret [11]
3 years ago
13

During strenuous exercise, the heart rate of an individual normally increases. Which factor is being regulated by this increase

in heart rate?
A.water
B.oxygen
C.ammonia
D.temperature
Biology
1 answer:
dolphi86 [110]3 years ago
7 0

Answer:

Increased heart rate, during strenuous exercise, helps to regulate the oxygen reaching the tissues.

Explanation:

Physical exercise implies an increased effort of the muscles, increasing the energetic demand and the substrate to produce more energy.

Both glucose and oxygen are needed by the muscle tissue during physical exercise, so the increased heart rate ensures the supply of oxygen to that tissue.

Therefore, an increase in heart rate contributes to the regulation of oxygen, whose requirements by the muscles increase with exercise.

Other options are not correct because:

 <em>   A and C. </em><em><u>Water</u></em><em> and </em><em><u>ammonia</u></em><em> regulation is done at the renal level. </em>

<em>     D. Regulation of </em><em><u>temperature</u></em><em> depends on the thermoregulatory center of the nervous system.</em>

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The mutation is a change in the nucleotidic sequence. In the exposed example, Patient 1: nucleotide 143, T<u>T</u>C⇒T<u>G</u>C. Patient 2: nucleotide 143, T<u>T</u>C⇒T<u>C</u>C. Patient 3: nucleotide 147, TT<u>C</u> ⇒ TT<u>G</u>.

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These mutations are the ones that have been selected by natural selection.

<h3>Solving the problem</h3>

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<u />

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