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Reptile [31]
4 years ago
4

As exercise levels increase, which of the following physiological changes occurs in the respiratory system?

Medicine
2 answers:
strojnjashka [21]4 years ago
4 0

Answer:

B

Explanation:

edu. 2020

stich3 [128]4 years ago
3 0
During excerise, the respiratory system respires more than when u are sitting down or relaxing. So the option A wouldn’t make sense. The lungs expand so u take more air in, and let it out. Think of ur hand take it in a fist and let it out as if u were giving a high five. Do this repeatedly. They expand and contract constantly, not at one time. that’s how the lungs work. This is to let more oxygen in ur body to go to the blood, and more CO2 is removed. so having the respiratory muscles shrink clearly dosent make sense.
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