How does Carbohydrate digestion happen?
Digestion of Carbohydrate starts in the mouth. This is because there is an enzyme in saliva called SALIVARY AMYLASE that splits starch ( carbohydrate) into Oligosaccharides ( oligosaccarides are about 2-8 linked glucose molecules). As you chew the food, the saliva mixes with it.
What happens next?
Well, when you swallow the food, it goes down into the stomach but salivary amylase that accompanies the food is inactivated by the acid in the stomach. (demonstrated below)
When the food gets into the small intestine ( the duodenum), PANCREATIC AMYLASE is released and continues the work of digestion. Starch is converted to more oligosaccharides
The brush border of the intestines release enzymes that further break down these oligosaccharides into monosaccharides. These enzymes at the brush border include : maltase, sucrase, lactase, dextrinase. These enzymes also split maltose, sucrose and lactose into their monosaccharides ( glucose, fructose and galactose). Digestion ends in the small intestine. These monosaccharides are then absorbed.
The excess undigested material passes into the large intestine and is finally passed out.
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