A substance that speeds up a chemical reaction without being used up or changed.
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Enzyme
A biological catalyst made out of protein
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Digestion
The breakdown of insoluble larger molecules into smaller soluble ones so they can be absorbed into the small intestine.
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Amylase
Enzyme that breaks down starch into glucose.
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Protease
An enzyme that breaks down proteins into amino acids.
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Lipase
An enzyme that breaks down lipids(fats) into fatty acids and glycerol.
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Isomerase
An enzyme that converts glucose into the much sweeter fructose.
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Emulsification
Breaking up large fat molecules into smaller fat droplets, in order to increase the surface area over which the lipase enzymes can work and therefore speed up the digestion of lipids.
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Aerobic Respiration
Complete breakdown of glucose to oxygen to form carbon dioxide and water and to release energy.
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Anaerobic Respiration
Incomplete breakdown of glucose and oxygen to make lactic acid and release a small amount of oxygen.
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Oxygen Debt
The amount of oxygen needed to oxidise and break down lactic acid (built up after vigorous exercise) into carbon dioxide and water.
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