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Question

During heavy exercise, the breathing rate can increase upto ........... per minute.
  1. 35 times
  2. 40 times
  3. 20 times
  4. 25 times

A
25 times
B
20 times
C
35 times
D
40 times
Solution
Verified by Toppr

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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