Question

During exercise , our body requires increased amount of oxygen. What happens in the body to provide the increased amount of oxygen?
1. The rate of inhalation increases.
2. The rate of sweating increases.
3. The heart rate increases.

a.only 1
b.only 3
c.only 1 and 2
d.only 1 and 3

Answer 1

Explanation:

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Breathing rate increases to provide the body (exercising muscles) with oxygen at a higher rate. Heart rate increases to deliver the oxygen (and glucose) to the respiring muscles more efficiently.

Answer 2

Explanation:

The Heart rate increases....