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Respiration / Metabolism (anaerobic respiration (in exercise (when you do…
Respiration / Metabolism
respiration - the process of transferring energy from glucose, which goes on in every cell
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aerobic respiration
aerobic respiration is respiration using oxygen and is the most efficient way to transfer energy from glucose
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anaerobic respiration
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anaerobic respiration doesn't transfer as much energy as aerobic respiration as the glucose isn't fully oxidised
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in exercise
when you do vigorous exercise your body cant supply enough oxygen to your muscles quickly enough so they respire anaerobically
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muscle fatigue - caused by long periods of exercise and is when the muscles get tired and stop contracting efficiently
oxygen debt - the amount of extra oxygen your body needs to react with the build up of lactic acid and remove it from the cells
the blood that enters your muscles transports the lactic acid to the liver where it is converted back to glucose
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metabolism
metabolism - all chemical reactions involved in maintaining the living state of the cells and the organism
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metabolic processes :
- lots of small glucose molecules are joined together in reactions to form starch
- lipid molecules are each made from one molecule of glycerol and three fatty acids
- glucose is combined with nitrate ions to make amino acids which are then made into proteins
- glucose is broken down in respiration which transfers energy to power all the reactions in the body that make molecules
- excess protein is broken down in a reaction to produce urea which is excreted in urine