Biology 2382B Lecture Notes - Bile Acid, Parotid Gland, Chyme
29 May 2013
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Parotid gland: secretes watery liquid + amylase. Submandular gland: thicker liquid + amylase. Sublingual gland: mucus + less amylase. Sns: can"t initiate, potentiates effects of psns. 2-3 l of gastric juices secreted everyday. Slippery for food to move through: sub mucosa. Collagen to make it stretchy: smooth muscle, serosa. Pyloric sphincter: mixing and tossing of chyme a little passed though it but most tossed back for more mixing and eventually little by little gets out. Inactivation of salivary amylase and activation of lingual lipase. Production of hcl: to reduce ph. Activates lingual lipase: digestion of fatty acids. Activates pepsin: pepsinogen + hcl -> pepsin, begins protein digestion. Produces juices to send to small intestine for breakdown. Bicarbonate: helps neutralize ph of chyme, hcl and bicarbonate in chyme. Pancreatic amylase: breaks down starch into maltose. Chymotripsinogen -> chymotrypsin: breakdown of proteins and polypeptides. Trypsinogen -> trypsin: enzyme, breaks polypeptides into peptides. Procarboxypeptidase -> carboxypeptidase: helps with digestion.
