Biology for IGCSE & O level - Gas Exchange In Humans (Section 2 - No. 26)
During strenuous exercise, what happens to the breathing rate and depth?
Breathing rate decreases, depth decreases
Breathing rate increases, depth decreases
Breathing rate decreases, depth increases
Breathing rate increases, depth increases
Explanation
During exercise, the body needs more oxygen and expels more carbon dioxide.
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