PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Anaerobic respiration in muscle cells
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causes fatigue
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produces lactic acid
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occurs with a lack of oxygen
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all of these
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Explanation:
Detailed explanation-1: -Anaerobic respiration happens in muscles during hard exercise. Glucose is not completely broken down, so less energy is released than during aerobic respiration. There is a build-up of lactic acid in the muscles during vigorous exercise. The lactic acid needs to be oxidised to carbon dioxide and water later.
Detailed explanation-2: -Fast oxidative (FO) fibers have fast contractions and primarily use aerobic respiration, but because they may switch to anaerobic respiration (glycolysis), can fatigue more quickly than SO fibers. Fast glycolytic (FG) fibers have fast contractions and primarily use anaerobic glycolysis.
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