class notes 4.5

class notes 4.5 - Biology 1006: 4/5/2010 Salivary glands: o...

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Biology 1006: 4/5/2010 Salivary glands: o Saliva- lubricating mucous (glycoprotein) to facilitate swallowing o Salivary amylase- to start carbohydrate digestion Starches sugar (starch is being broken down into glucose, carbohydrate digestion begins in our mouth when this occurs o Exocrine: proteins, enzymes, etc are excreted from a gland through a duct o Endocrine: proteins, hormones, etc. are released directly into the blood stream (ductless) (ovaries, testies, thyroid) Epiglottis: controlled by muscles, makes it so food and liquid that it eaten does not go into their lungs but instead goes down their throat o Infant- epiglottis is high in the throat, so they can breath and eat at the same time o Adults- epiglottis is low in the throat so cannot eat and breath at the same time Carbohydrates: starch is broken down into disaccharides, and then into monoccharides Proteins: broken down into amino acids Fats: broken down into lipid molecules, and then into glycerol and fatty acids Stomach secretes two different things: o HCl- hydrochloric acid o Mucous-v protects the lining of the stomach from acid o Pepsinogen pepsin, endopeptidase enzyme o Stomach produce this is an inactive form, so the stomach doesn’t break itself
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This note was uploaded on 01/18/2012 for the course BIO 1006 taught by Professor Staff during the Spring '10 term at Virginia Tech.

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class notes 4.5 - Biology 1006: 4/5/2010 Salivary glands: o...

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