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PSL201Y1 (46)
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PSL201 – March 23 – GI 3&4.docx

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Department
Physiology
Course
PSL201Y1
Professor
Michelle French
Semester
Winter

Description
PSL201March 23GI 34 Carbohydratesmost in the form of polysaccharides starch and cellulosecellulose cannot be digested excreted in feces o aids in intestinal motilitymonosaccharides are the absorbable forms o most carbs must be digested before they can be absorbed Digestion of Carbohydratespolysaccharides are digested by amylases o located in saliva and pancreatic juice o salivary amylase is inactivated by stomach acid o cannot break bonds at branch pints or between glucose monomers o reduce starch or glycogen to maltose or short branched polysaccharides called limit dextrinsbrush border enzymes complete the digestion of monosaccharaides o include dextrins and glucoamylase o break limit dextrins into sucrase lactase and maltasehydrolysis sucrose into glucose and fructoselactose into to glucose and galactosemaltose to two glucosemonosaccarides then transported into epithelial cells Absorption of Carbohydratesglucose and galactose enter the epithelial cells via cotransport w Na and then cross the basal membranse by
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