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What digestive enzymes are secreted by salivary glands and what substrate do they act...

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teresamac | Student, Undergraduate | eNotes Newbie

Posted March 30, 2012 at 5:48 AM via web

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What digestive enzymes are secreted by salivary glands and what substrate do they act on?

I understand amylase a bit...but beyond that, I'm stumped.

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trophyhunter1 | College Teacher | (Level 3) Senior Educator

Posted April 11, 2012 at 11:28 PM (Answer #1)

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Saliva contains secretions that are produced in salivary glands. It contains 98% water with electrolytes, mucus, glycoproteins, enzymes and antibacterial compounds. The enzyme amylase in saliva aids in breaking down the polysaccharide starch while its in the mouth. The particular enzyme is called ptyalin. Starch becomes simpler sugars when acted on by saliva and further breaks down while in the small intestine, to glucose, a monosaccharide, or simple sugar. Salivary lipase, a fat enzyme aids newborns in digesting fat because their pancreatic lipase is not yet developed. Lingual lipase starts the digestion of lipids and fats.

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atyourservice | Student, Grade 10 | Valedictorian

Posted May 23, 2014 at 8:48 PM (Answer #4)

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lingueal lipase to break down fats

salivary amylase to break down starch 

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