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Is starch converted in the small intestine?

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is starch converted in the small intestine?

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  1. starch is very weakly digested in the mouth giving the slowly sweetening taste of starch placed in the mouth. N digestion occurs in the stomach although a small portion may be hydrolyzed by the acidic conditions. Nearly all the starch is digested in the upper 1/3 of the small intestine ( duodenum ) by pancreatic amylase ( a complex ) that degrades the starch to maltose ( an alpha 1,4 inked dimer of glucose ) and isomaltose an alpha 1, 6 linked dimer of glucose ) These two disaccharides are then diigested in the glycocalyx ( brush border ) of the enterocyes ( intestinal absorptive cells onthe villi ) by enzymes called maltase and ismaltase. The glucose is then absorbed by sodium dependent and independent GLUT transporters  


  2. Starch is digested in the mouth & stomach but the most action takes place in the mouth. The saliva breaks down the starch, if you want proof try placing a piece of bread in your mouth and don't eat/chew it. Eventually the bread will disintegrate.

    Maltose is a type of sugar, I think.

    Hope that helps


  3. Good day!

    Starch conversion is mainly digested in small intestine by Pancreatic Amylase that will break it to glucose for uptake. But some initial breakdown of starch occurs in mouth by salivary amylase enzyme that giives sweetness to rather tasteless breads after some chewing and mixing with saliva.


  4. No, starch is digested partially in the mouth. Starch has two components- amylose and amylopectin. Amylose is digested in the mouth by amylase (saliva). Remnants are digested in the small intestine by pancreatic amylase.

    Maltose is a disaccharide, consisting of two glucose molecules joined together by only 1 1,4 alpha glycosidic bond,  whereas starch is a polysaccharide. Amylose and amylopectin have different structures and properties, but generally contain a h**l lot of glucose.

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