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Small Intestine - Anatomy & Physiology (view source)
Revision as of 09:22, 17 July 2008
, 09:22, 17 July 2008→To secrete enzymes for the digestion of chyme and absorb the products of digestion
**''Glycogen'' is synthesised in the liver and muscle and is similar to amylopectin as it has both α1-4 glycosidic links and α1-6 glycosidic links. However it is more highly branched with shorter branches (branches every 12-18 glucose residues).
**''Glycogen'' is synthesised in the liver and muscle and is similar to amylopectin as it has both α1-4 glycosidic links and α1-6 glycosidic links. However it is more highly branched with shorter branches (branches every 12-18 glucose residues).
*The first stage of carbohydrate digestion begins with α-amylase, which is an endoglycosidase. ''(This means it breaks bonds in the middle of the polymer to produce di-, tri- and oligo-saccarides).''
*The first stage of carbohydrate digestion begins with α-amylase, which is an endoglycosidase. ''(This means it breaks bonds in the middle of the polymer to produce di-, tri- and oligo-saccarides).''
*This begins in the [[Oral Cavity Overview - Anatomy & Physiology|oral cavity]] where [[Oral Cavity - Salivary Glands - Anatomy & Physiology|saliva]] is produced that contains α-amylase. Salivary α-amylase is inactivated when it enters the stomach due to the acidic pH.
*α-Amylase is present in [[Oral Cavity - Salivary Glands - Anatomy & Physiology|saliva]]. Salivary α-amylase is inactivated when it enters the stomach due to the acidic pH.
*Carbohydrate digestion continues in the lumen of the [[Small Intestine - Anatomy & Physiology|small intestine]] as pancreatic α-amylase enters the [[Duodenum - Anatomy & Physiology|duodenum]] in the pancreatic duct. This is the site of the majority of carbohydrate digestion.
*Carbohydrate digestion continues in the lumen of the [[Small Intestine - Anatomy & Physiology|small intestine]] as pancreatic α-amylase enters the [[Duodenum - Anatomy & Physiology|duodenum]] in the pancreatic duct. This is the site of the majority of carbohydrate digestion.
*The second stage is the digestion of di-, tri-, and oligo-saccharides to monosaccharides.
*The second stage is the digestion of di-, tri-, and oligo-saccharides to monosaccharides.