The alcohol fermentation reaction is the following: Figure 4.21 The reaction resulting in alcohol fermentation is shown. Why do you think this is the case?Īnother familiar fermentation process is alcohol fermentation ( Figure 4.21), which produces ethanol, an alcohol. ![]() Symptoms of this disease, which include vomiting, abdominal pain, and tremors, become worse after exercise. When cows eat this plant, Tremetol is concentrated in the milk. Tremetol, a metabolic poison found in white snake root plant, prevents the metabolism of lactate. The chemical reaction of lactic acid fermentation is the following: In muscles, lactic acid produced by fermentation must be removed by the blood circulation and brought to the liver for further metabolism. This occurs routinely in mammalian red blood cells and in skeletal muscle that has insufficient oxygen supply to allow aerobic respiration to continue (that is, in muscles used to the point of fatigue). The fermentation method used by animals and some bacteria like those in yogurt is lactic acid fermentation ( Figure 4.20). Anaerobic respiration enables organisms to convert energy for their use in the absence of oxygen. In contrast, some living systems use an inorganic molecule as a final electron acceptor both methods are a type of anaerobic cellular respiration. ![]() Processes that use an organic molecule to regenerate NAD + from NADH are collectively referred to as fermentation. How is this done? Some living systems use an organic molecule as the final electron acceptor. ![]() If aerobic respiration does not occur, NADH must be reoxidized to NAD + for reuse as an electron carrier for glycolysis to continue. If aerobic respiration occurs, then ATP will be produced using the energy of the high-energy electrons carried by NADH or FADH 2 to the electron transport chain. In aerobic respiration, the final electron acceptor is an oxygen molecule, O 2. Describe the type of fermentation that readily occurs in animal cells and the conditions that initiate that fermentation.Discuss the fundamental difference between anaerobic cellular respiration and fermentation.By the end of this section, you will be able to:
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