Question

Normal range of breathing rate per minute in an average adult person at rest is.

A
912
B
1518
C
2124
D
3033

Solution

The correct option is B $$15-18$$Breathing (or ventilation) is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide.The Normal range of breathing rate per minute in an average adult person at rest is 15-18.So, the correct answer is '15-18'.ScienceNCERTStandard VII

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