Asked in UHS MDCAT 2008 2008Moderate

Which form of anaerobic respiration occurs in muscle cell of humans and other animals during extreme physical activities?

Correct answer: B. Lactic acid fermentation.

  • A. Alcoholic fermentation.
  • B. Lactic acid fermentation.
  • C. Glycolysis.
  • D. Pyruvic acid oxidation.

Explanation

The product of this reaction is lactic acid. This builds up in muscles causing pain and tiredness, which can lead to cramp. After you finish vigorous exercise you continue to breathe deeply and quickly for a short period.

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About Cellular Respiration

Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.

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