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    Question

    Muscle fatigue is due to the accumulation of

    A cholesterol Correct Answer Incorrect Answer
    B lactic acid Correct Answer Incorrect Answer
    C lipoic acid Correct Answer Incorrect Answer
    D triglycerides Correct Answer Incorrect Answer

    Solution

    Lactic acid accumulates during anaerobic respiration in muscles when oxygen supply is insufficient, leading to muscle fatigue. Information Booster:

    1. Anaerobic respiration occurs during intense exercise.
    2. Lactic acid lowers pH, causing pain and fatigue.
    3. Oxygen debt is required to metabolize lactic acid.

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