. During heavy exercise like swimming, running, cycling etc, rate of breathing


(a) decreases

(b) increases

(c) stops

(d) both (a) & (b)

Best Answer

(b)

The number of times a person breathes in a minute is called breathing-rate. During heavy exercises the breathing rate increases because our body demands more energy and for this we have to breathe fast, to inhale oxygen quickly and to exhale carobon-di-oxide.

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