Single Answer MCQ
Q-00045867

During intense exercise, which physiological change occurs?

1

Heart rate decreases instantly

2

Blood vessels to muscles constrict

3

Heart pumps more blood per beat

4

Oxygen levels in blood decrease

Answer and Solution

Answer

C. Heart pumps more blood per beat

Solution:

During intense exercise, the heart pumps more blood with each beat to meet the oxygen needs of the working muscles.

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