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Single Answer MCQ
Q-00020138

What mechanism helps to enhance oxygen supply during rigorous exercise?

1

Decreased heart rate

2

Increased respiratory rate

3

Decreased tidal volume

4

Reduced capillary density

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Sandeep Chaturvedi

Sandeep Chaturvedi

CBSE Social Science & Humanities Reviewer

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Answer and Solution

Answer

B. Increased respiratory rate

Solution:

To enhance oxygen supply during rigorous exercise, the body increases the respiratory rate to take in more air, thus increasing oxygen availability. Therefore, 'Increased respiratory rate' is the correct choice.

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