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Energy Generation During Vigorous Exercise

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Which of the following best describes how muscle cells generate energy during vigorous exercise?

A

Pyruvate is oxidized to lactic acid

B

Pyruvate is reduced to acetaldehyde

C

Pyruvate is reduced to lactic acid

D

Lactic acid is used as an energy source instead of glucose

E

Pyruvate is oxidized to acetaldehyde

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