PHGY 210 Lecture Notes - Bile Acid, Duodenum, Gallbladder
14 May 2012
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Document Summary
Bile- contains no digestive enzymes but is essential for the digestion of fats. It contains the bile salts. liver secretes bile, which is released into the duodenum from bile ducts. 3% solids- for every 100 ml of bile, there are 3 grams of solid. None of it is digestive enzymes (unlike pancreatic juices). Bile secretion by the liver is continuous: it releases about 0. 5-1. 0 l/day. Entrance into the duodenum is intermittent, and the volume of bile entering is. During the interdigestive period, the sphincter of oddi is closed. As the liver keeps secreting the bile, it encounters resistance and is reverted into the gallbladder where it is temporarily stored. Gallbladder has a capacity of about 50 ml. Bile salts are synthesized in the liver from cholesterol. 1. they combine with fat-soluble substances to form water-soluble complexes. 3. they assist in the transport and absorption of fat and fat-soluble vitamins (a,d,e. k) Daily release into intestine: 15 20 g.
