GI Part 4- 2 Flashcards
What is the pH of the liver?
8.2 = alkaline
What are bile acids synthesized from?
Cholesterol
What is bile acid conjugated with?
Amino acids
What type of acids are amphipathic molecules?
Bile acids
What are the 2 main types of bile acids?
Glycocholate
Taurocholate
What molecules have one side polar and one side non polar?
Bile acids
Bile acids are secreted into the duodenum where they ________ fat droplets in the small intestine
Emulsify
What are the sphincter smooth muscle cells that guard the entrance of the bile into the doudenum?
Spincher of Oddi
After a meal= ________ in amino acids and fatty acids in doudenum —> __________ in CCK —> __________ of smooth muscle of the gallbladder and _________ of Oddi’s sphincter
Increase
Increase
Contraction
Relaxation
Reflective stimulation —> __________ in Ach —> __________ of the smooth muscle of the gallbladder
Increase
Contraction
After fats are digested and absorbed, bile acids go to the _______, where they are reabsorbed using an active transport process
Ileum
What percent of out bile acids pool is synthesized de novo in the liver?
5%
What percent of bile acid recirculates between the small intestine and the liver?
95%
What pancreas is an acinar gland connected by an absorbing system of ducts?
Exocrine pancreas
What pancreas resembles a salivary gland?
Exocrine pancreas
