2 - HUMAN NUTRITION
- Break down big molecules into smaller ones
- Starch, proteins and fats are too big to pass through walls of digestive system and insoluble
- Sugars, amino acids, glycerol and fatty acids are smaller, soluble and can pass through walls of digestive system
Amylase - starch to maltose
Maltase - maltose to glucose
Protease(s) - proteins to amino acids
Lipase(s) - lipids to glycerol and fatty acids
Bile -
- Produced in liver, stored in gall bladder, released into small intestine
- Neutralises stomach acid
- Emulsifies fats
- HCl in stomach makes pH too acidic for enzymes in small intestine - bile neutralises/makes conditions alkaline
- Emulsifies fats - breaks fats into tiny droplets (bigger surface area for lipase to break down - speeds up digestion)
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