PHYSIOLOGY
MUSCLE ENERGETICS ATP AND CP
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The most likely cause of fatigue in an athlete competing in a 200m athletics event on a very hot 40 degree Celsius day would be
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neural transmitter tiredness.
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depletion of muscle glycogen.
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decreased muscle pH levels.
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dehydration.
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Explanation:
Detailed explanation-1: -During exercise at a very high intensity (usually the VO2max is already reached), the demand for more ATP cannot be met by increases in oxygen delivery, thus resulting in an imbalance of metabolic homeostasis and leading to fatigue.
Detailed explanation-2: -Glycolysis converts glucose to pyruvate, water and NADH, producing two molecules of ATP. Excess pyruvate is converted to lactic acid which causes muscle fatigue.
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