WBCS.LIVE practice question

The painful accumulation of which acid in human muscles causes severe fatigue during heavy physical exercise?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Uric acid
  2. Lactic acid
  3. Acetic acid
  4. Citric acid

Correct answer and explanation

Correct answer: Lactic acid

Explanation: āœ… Correct Answer: B) Lactic acid šŸ“š Explanation: During heavy and intense physical exercise, the human body often cannot supply oxygen to the muscles fast enough for standard aerobic respiration. To maintain energy production, the muscles temporarily switch to anaerobic respiration, which breaks down glucose without oxygen. This specific emergency process creates lactic acid as a byproduct, heavily contributing to muscle cramps and fatigue.