During muscle contraction, ATP can be generated by the creatine phosphate pathway, by cellular respiration, and by .
Question
During muscle contraction, ATP can be generated by the creatine phosphate pathway, by cellular respiration, and by .
Solution
During muscle contraction, ATP can be generated by the creatine phosphate pathway, by cellular respiration, and by anaerobic glycolysis.
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Creatine Phosphate Pathway: This is the quickest way to generate ATP. Creatine phosphate, stored in muscle cells, donates a phosphate to ADP to quickly form ATP. This system is used at the start of exercise and during short, high-intensity exercise.
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Cellular Respiration: This is a more complex process that generates ATP from glucose, fatty acids, or amino acids in the presence of oxygen. It includes three stages: glycolysis, the Krebs cycle, and the electron transport chain. This system is used during rest and light-to-moderate exercise.
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Anaerobic Glycolysis: This process generates ATP when oxygen supply is insufficient, such as during intense exercise. Glucose is broken down into pyruvate, producing a small amount of ATP. If oxygen is not available, pyruvate is converted into lactate, which allows glycolysis to continue producing ATP.
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