BIOC34H3 : study guide

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4 May 2011
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Slide 1: when helicobacter pylori bacteria have eaten" through the phospholipid bilayer, pepsin and hcl could sip through and stimulate mast cells, mast cells: cells that release histamine. histamine then performs positive feedback to stimulate parietal cells to release more hcl. dangerous cycle that could cause severe gastric ulcers. Slide 2: the small intestine has 3 distinct regions, duodenum: starting section in which digestive enzymes and bile are secreted into. enzymes and bile are dumped here in order to be neutralized, which allows enzymes and stuff to work. most absorption occurs in first 20% of small intestine: jejunum, i leum: leads into the large intestine. I l leocelcal sphincter divides ileum from large intestine. Slide 5: the large intestine also is divided into various segments, illeocelcal sphincter controls entry from the ileum (small) into the cecum(large, cecumascending colontransverse colon descending colon sigmoid colon, involved mainly in water / ion absorption.

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