During strenuous exercise,which of the follow | vedclass

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(D) During strenuous exercise,the demand for $ATP$ in muscle cells increases significantly.When the oxygen supply is insufficient to meet this demand

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Pyruvic acid is converted into lactic acid

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(D) During strenuous exercise,the demand for $ATP$ in muscle cells increases significantly.When the oxygen supply is insufficient to meet this demand through aerobic respiration,muscle cells switch to anaerobic respiration.In this process,the pyruvic acid produced via glycolysis is reduced to lactic acid by the enzyme lactate dehydrogenase.This allows for the regeneration of $NAD^+$ from $NADH$,enabling glycolysis to continue and provide a small amount of $ATP$ to the working muscles.

During strenuous exercise,which of the following changes occurs?

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