NUTR 132 Lecture Notes - Lecture 3: Sigmoid Colon, Feces, Duodenum
30 Nov 2018
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Stomach, upper gi, large sac that can hold up to 4 cups for several hrs, size varies for each person (can be altered by surgery) i. Goes in for gastric bypass: concentration of stomach acid (hydrochloric acid) increases as food enters, little absorption of nutrients occur in stomach, chyme i. Leaves stomach (1 teaspoon at a time) & enters small intestine through the pyloric sphincter: very little absorption of nutrients occurs in stomach mostly in small intestine g. Ex. calcium - eat on empty stomach so it can absorb better vs having it with food: organization of the small intestine. Receives chyme from stomach & digestive juices from pancreas & gallbladder: most chemical digestion of nutrients, jejunum, middle segment ii. Fingerlike protrusions that participate in digestion & absorption of food: absorptive cells ( enterocytes , microvilli i. Intestinal cells that line villi & absorbs nutrients i. ii. iii. Extensive folds on the mucosal surface of the absorptive cells.
