- Created by: daisy yemm
- Created on: 22-02-19 11:31
Energy for muscle contraction
ATP has to be continually generated so exercise can continue - this happens in 3 main ways:
1. Aerobic respiration
- most ATP is generated via oxidative phosphorylation in the cell's mitochondria
- It only works where there is oxygen so it is good for long periods of low intensity exercise e.g a long walk
2. Anaerobic respiration
- ATP is made rapidly by glycolysis. The end product of glycolysis is pyruvate, which is converted to lactate by lactate fermentation.
- Lactate can quickly build up in the muscles and cause muscle fatigue.
- it is good for short periods of hard exercise, e.g a 400m sprint
3. ATP-phosphocreatine(PCr) system-
- ATP is made by phosphorylating ADP (taken from PCr). PCr is stored in cells and the ATP-PCr system generates ATP very quickly. It runs out very quickly, is anaerobic and alactic.
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