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Life Processes
Question
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What happens to the rate of breathing during vigorous exercise and why?

Answer

Under normal conditions, the rate of breathing of a normal person is 15 to 18 times per minute. During vigorous exercise, the rate of breathing increases by about 20 to 25 times per minute.
Reason: During vigorous exercise, the demand of oxygen increasesto release more energy for extra work. Hence, there is increase in breathing rate to supply the extra oxygen needed.

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