Breakdown of pyruvate into lactic acid and energy in lack of oxygen takes place in which of the following?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Human muscle cells.
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In the absence of oxygen, human muscle cells undergo anaerobic respiration.
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During intense physical activity, the oxygen supply to muscles may not meet the demand.
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In such cases, pyruvate (formed from glucose) is broken down into lactic acid.
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This process also releases a small amount of energy (ATP).
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Accumulation of lactic acid in muscles causes fatigue and soreness.
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Once oxygen becomes available, lactic acid is transported to the liver for further processing.
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This temporary process allows muscles to continue functioning even with limited oxygen.
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It is an adaptation to short-term strenuous activity like sprinting or weightlifting.
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