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
What pancreas is responsible for secretion of hormones?
Endocrine pancreas
What pancreas is responsible for secretion of digestive enzymes and electrolytes?
Exocrine pancreas
What does the secretion of acinus resemble with HCO3- addition?
Primary saliva
