BIOL 121 Lecture Notes - Lecture 31: Portal Vein, Common Bile Duct, Pancreatic Duct
Document Summary
Accessory organs of the digestive system: pancreas. Pancreatic amylase made by acinar cells, carbohydrate digestion. Pancreatic lipase made by acinar cells, lipid digestion. Trypsinogen trypsin (activated by entrokynase) made by acinar cells, protein digestion. Following are activated by trypsin: chymotrypsinogen chymotrypsin protein digestion. Procolipase colipase phospholipid digestion: pancreas makes a lot of inactive enzymes because of they were made active they would eat away at pancreatic cells. Endocrine cells: function of endocrine secretions. Acts on cells to store nutrients from blood: glucagon secreted by alpha cells. Tells cells to release glucose between meals. Decrease stomach hcl secretions: liver (diagrams on pg. 309 of workbook) Main cell type: hepatocytes secrete bile. Bile aids in the digestion and therefore absorption of lipids: bile is secreted into bile canallcus. Bile canallcus small ducts between hepatocytes that secrete: form larger structures that eventually merge into the left & right hepatic duct and then into the common bile duct.
