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Question
A sportsman, after a long break from his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to ______.
Options
lack of carbon dioxide and the formation of pyruvate.
presence of oxygen and the formation of ethanol.
lack of oxygen and the formation of lactic acid.
lack of oxygen and the formation of carbon dioxide.
Solution
A sportsman, after a long break from his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to a lack of oxygen and the formation of lactic acid.
Explanation:
While there is a strong demand for energy during vigorous exercise, there is a finite amount of oxygen available. Therefore, to meet the need for energy, anaerobic respiration occurs in the muscle cells. Lactic acid is created in muscles as a result of the anaerobic metabolism of glucose. Muscle cramps are caused by the buildup of lactic acid in the muscles.
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