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Single Answer MCQ
Q-00020100

What is one reason why muscle fatigue occurs during prolonged exercise?

1

Lack of oxygen supply to muscles

2

Buildup of hemoglobin

3

Increase in lactic acid concentration

4

Muscle cells swell with blood

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Answer and Solution

Answer

C. Increase in lactic acid concentration

Solution:

Muscle fatigue during prolonged exercise occurs mainly due to an increase in lactic acid concentration when oxygen levels are insufficient for energy production. The other options are not the primary causes of fatigue.

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