PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Creatine Phosphate
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Anaerobic Respiration
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Kreb Cycle
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Aerobic Respiration
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Detailed explanation-1: -Within two minutes of exercise, the body starts to supply working muscles with oxygen. When oxygen is present, aerobic respiration can take place to break down the glucose for ATP. This glucose can come from several places: remaining glucose supply in the muscle cells.
Detailed explanation-2: -Cellular respiration provides ATP during muscle contraction in A-Level Biology by breaking down glucose and other organic molecules to release energy. This energy is then used to produce ATP, which can be used to power muscle contractions.
Detailed explanation-3: -Anaerobic respiration happens in muscles during hard exercise. Glucose is not completely broken down, so less energy is released than during aerobic respiration. There is a build-up of lactic acid in the muscles during vigorous exercise. The lactic acid needs to be oxidised to carbon dioxide and water later.