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Question

During heavy exercise, the breathing rate can increase upto ........... per minute.

A
35 times
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B
40 times
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C
20 times
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D
25 times
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Solution

The correct option is D 25 times
During exercise, your lungs and respiratory system must provide more oxygen to the blood. You will breathe harder and faster because: Respiratory muscles are stimulated by sympathetic nerves in order to increase the rate of breathing. If the exercise is intense, breathing rates may increase from a typical resting rate of 15 breaths per minute up to 40 – 50 breaths per minute. Hence, during heavy exercise, the breathing rate can increase up to 25 times.
So, the correct option is '25 times'.

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