Carbohydrate Digestion
- Created by: Ellie Rivers
- Created on: 11-05-13 11:08
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- Carbohydrate Digestion
- Disaccharide Digestion
- Lactose
- digested in the small intestine where the epithelial lining produces lactase
- the sugar found in milk
- lactase hydolyses the glycosidic bond that links gluclose and galactose
- Sucrose
- this hydrolyses the glycosidic bonds in sucrose
- the epithelial lining of the intestine releases sucrase
- this produces two monosaccharides - glucose and fructose
- Sucrose must be physically broken down by teeth to release it
- Lactose
- Lacotse Intolerance
- these people cannot digest lactose
- in some people it can reduce so much that there is not enough or none at all
- once the lactose reaches the large intestine microorganisms break it down
- this can cause gas, nausea, cramps and diarrhoea
- the production of lactase diminishes as an adult
- Starch Digestion
- Amylase hydrolyses the glycosidic bonds of starch
- Amylase is produced in the mouth and the pancreas
- this produces maltose
- Maltose is then hydrolysed by maltase produced in the lining of the small intestine
- food is broken down by the teeth giving it a large surface area
- Saliva containing amylase enters the mouth through the salivary glands
- pH in the stomach denatures the enzyme amylase
- the maltase breaks down the starch into alpha gluclose
- Disaccharide Digestion
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