WESOME Help Save & Exit Week 5 5 Complete the following statements wll be used t
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WESOME Help Save & Exit Week 5 5 Complete the following statements wll be used to assess your understanding of the ATP production mechanisms of muscle cells. Not all choice fatty acios The amount of ATP that normally exists in a muscle cell lasts to duing strenuous exercise There ave ee ways hat msnes can oban new ATP. Two mends and creatine phosphate breakdown ave anaerobic and ave theretore celear respration several minutes The speedest "ay tr muscle cells to make ATP S by beearg down which occurs in the mdst of the soing niaments lactate Dung tmentation gimse cramping and tatique broken down nto -which can resuit n few seconds Most of the ATP generated by a muscle celil comes from which uses to protuce ATP A muscle-speafic molecale called myoglobi heps provide oxygen for this process. creatne ResetExplanation / Answer
1) a few seconds, Muscle fibres store only enough energy in form of ATP to contract for a very short time (1-2 seconds), so when a fiber is active, ATP must be generated.
2) Fermentation, In muscles, glucose can be metabolised anerobically to produce lactate and to provide quick energy when oxygen supply is low during strenous exercise.
3) Creatin Phosphate, Creatine phosphate contains high-energy phosphate bonds, and it is 3-6 times more abundant in muscle fibers than ATP. Creatine kinase catalyzes the transfer of a high-energy phosphate from creatine phosphate back to ADP. This direct phosphorylation quickly generates new ATP molecules.
4) Lactate, During strenuous exercise, available oxygen is used primarily to synthesize the ATP the muscle fiber requires to contract, rather than to make ATP for synthesizing glucose from lactic acid. Consequently, as lactic acid accumulates, a person develops an oxygen debt that must be repaid. Heavy breathing (increased rate and depth) following exercise occurs due to oxygen debt.
5) Cellular respiration, fatty acids, myoglobin; Muscle fibers depend on cellular respiration of glucose as an energy source for synthesizing ATP. Also, fibers rely mostly on the aerobic metabolism of fatty acids to generate ATP. When a muscle starts contracting, the mitochondria begin breaking down molecules of pyruvic acid instead of fatty acids. Myoglobin can loosely combine with oxygen (from hemoglobin). This ability to store oxygen temporarily reduces a muscle's requirement for a continuous blood supply during muscular contraction.
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