PHGY 313 Lecture : 14- Secretion and non occlusive ischemic gut.docx
17 Jul 2013
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Lecture 14 - neural control of gi function & salivary glands. Today"s lecture will be in two parts: understanding the small intestine and its functions, secretory glands since they"re important. Brief overview of digestion: chyme goes to small intestine and leads to the secretion of secretin and cck. Secretin causes the release of alkaline pancreatic juice and alkaline bile. 95% of water we take in is absorbed in si. Note: tetracycline inhibits bacterial growth by inhibiting protein synthesis. Active transport of na+ across the basolateral border (passive across apical membrane: the na+ gradient provides the driving force for the inward movement of 2 cl anions into the cell with 1 na and 1 k+. The k+ immediately exits into the lumen to balance the gradient. Cl- then goes to the lumen through cftr. Na+ also enters the lumen by going between cells down its gradient.
