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CBSE Class 10 Science Question 12 of 45

Solved 2024 Sample Question Paper CBSE Class 10 Science — Question 12

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Question 12

A sportsman, after a long break of his routine exercise, suffered muscular cramps during a heavy exercise session. This happened due to:

  1. lack of carbon dioxide and formation of pyruvate.
  2. presence of oxygen and formation of ethanol.
  3. lack of oxygen and formation of lactic acid.
  4. lack of oxygen and formation of carbon dioxide.
Answer

lack of oxygen and formation of lactic acid.

Reason — Muscular cramps during heavy exercise are often associated with the accumulation of lactic acid in muscles. This occurs when there is insufficient oxygen available to meet the energy demands of the muscles, leading to anaerobic metabolism and the production of lactic acid.