Forced deep breathing for a few minutes by a person sitting at rest may be followed by a temporary cessation of breathing. This is due to

Options

A. Too much `O_(2)` in the blood
B. Too much `CO_(2)` in the blood
C. Very little `CO_(2)` in the blood
D. Both too much `O_(2)` and very little `CO_(2)` in the blood

Answer

d

Explanation

Deep beathing rises the `O_(2)` level of the blood. By excess fromation of oxyhaemoglobin the acidity of blood increases. To contral it , more of free `CO_(2)` level in the blood decrases. So due to lack of stimulant for inspiratory centre cessation of brathing takes place. after some time `O_(2)` is consumed by the tissues and rise in `CO_(2)` stimulates beathing again .