A sprinter feels cramps and pain in the thigh muscles after a run. This is due to accumulation of
- A. lactic acid ✓
- B. CO_2
- C. pyruvic acid
- D. ethanol
Correct Answer: A. lactic acid
Explanation
During vigorous exercise, anaerobic respiration occurs in muscle cells, leading to the accumulation of lactic acid, which causes muscle cramps.
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