Test 5 part 2
gastrin is inhibited by ______.
which cells do these come from?
gastric acid, intrinsic factor, pepsin, gastrin, histamine, mucus, new cells for stomach lining
gastric - parietal
pepsin- chief G
how does the duodenum handle stomach contents?
1) controls delivery- only 3 cc at a time
2) produces secretin which causes bicarbonate to enter the duodenum from the liver and pancreas
3) produces CCK which causes the release of bile to emulsify fats
what does CCK do?
1) contracts gall bladder
2) stimulates pancreatic secretion
3) relaxes sphincter of Oddi
what is bile?
phospholipids- the last two aid in digestion
what is the enteropheatic circulation?
absorption of bile acids in the distal ileum
return to the liver
re-secreted into the intestine
which enzymes digest proteins?
what are the exocrine functions of the pancreas?
primary function of the jejumum is _______
most food absorption occurs here
function of the ileum are ______.
small amount of food absorption
absorption of bile acids and vitamin B12-intrinsic factor complex
what separates small and large intestine?
what two muscular movements occur in the intestine?
sentimental contraction to mix food
peristalsis to move food along
what are brush border enzymes and what to they do?
enzymes in the cell membrane of the intestinal absorptive cells that produce the final breakdown of proteins to amino acids and carbohydrates to monosacchardies
how much food is absorbed in the large intestine?
Test 5 part 2