This form of anaerobic respiration occurs in muscle cells of humans and other animals during extreme physical activities, such as sprinting:
Correct answer: D. Lactic acid fermentation
- A. Alcoholic fermentation
- B. Aerobic respiration
- C. Anaerobic respiration
- D. Lactic acid fermentation
Explanation
The correct answer is lactic acid fermentation. During intense physical activities like sprinting, the oxygen supply to muscle cells is insufficient to meet energy demands through aerobic respiration. As a result, muscle cells switch to lactic acid fermentation, an anaerobic process, to produce ATP. This process converts glucose into lactic acid, allowing continued energy production without oxygen. Alcoholic fermentation is incorrect because it occurs in yeast and some bacteria, not in human muscle cells. Aerobic respiration is not applicable, as it requires oxygen. The general term 'anaerobic respiration' is too broad and does not specify the process in muscle cells.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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