Digestion and Enzymes
- Created by: alexda
- Created on: 09-04-15 11:58
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- The Digestive System and Enzymes
- Digestion is the breakdown of food into soluble products.
- Digestion is catalysed by enzymes.
- Starch, proteins and fats are big insoluble molecules so they are unable to pass through the walls of the digestive system.
- Sugars, amino acids, glycerol and fatty acids are smaller soluble molecules so they can pass through the walls of the digestive system.
- Carbohydrases including amylase digest starch to sugars.
- Proteases including pepsin digest proteins to amino acids.
- Starch, proteins and fats are big insoluble molecules so they are unable to pass through the walls of the digestive system.
- Digestion is catalysed by enzymes.
- Bile is produced in the liver and stored in the gall bladder prior to secretion into the small intestine.
- Bile is alkaline and neutralises excess hydrochloric acid in the stomach, otherwise conditions would be too acidic.
- Bile emulsifies fats. This creates a bigger surface area of fat for the enzyme lipase to react with and speeds up digestion.
- Digestion is the breakdown of food into soluble products.
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