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Atp Energy System

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Adenosine triphosphate (ATP) is used for energy in the body with energy being released when ATP is split so that one of the phosphates separates off. ATP is replenished by one of three energy systems. Two systems are anaerobic and one is aerobic. The aerobic system uses oxygen and so is called the oxidative system. It is the main one of the three systems used for endurance activities as it can create a large amount of ATP but does not do so very quickly. This happens in the parts of muscle cells called mitochondria. Initially glucose is broken down to make ATP, but unlike the glycolytic process without oxygen which also produces ATP, the pyruvic acid that results from the reactions involved is changed into acetyl CoA rather than becoming lactic

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