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Question

After a strenuous workout in a gym, which of the following accumulates in the muscles that causes muscle ache?​

A
Alcohol and lactic acid
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B
Alcohol and CO2
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C
Lactic acid and CO2
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D
Lactic acid only
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Solution

The correct option is D Lactic acid only
When sufficient oxygen is not present in the muscle cells for further oxidation, the muscle cells undergo anaerobic respiration giving out lactic acid as a by-product. Accumulation of lactic acid in the muscles causes muscular cramps.

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