Biology Enzymes and Respiration

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  • Created by: Callum
  • Created on: 22-04-13 16:34

Catalyst

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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