Physiology: small intestine & exocrine pancreas 2

Question 1

what are the secretions of the small intestine (7)

Answer 1

gastrin, secretin, CCK, gastric inhibitory peptide(GIP), GLP-1, motilin and ghrelin

Question 2

what is the function of gastrin

Answer 2

stimulates H+ secretion by parietal cells and growth of gastric mucosa

Question 3

what is the function of secretin

Answer 3

promotes secretion of pancreatic + biliary HCO3

Question 4

what is the function of CCK

Answer 4

inhibits gastric emptying, causes secretion of pancreatic enzymes, stimulates relaxation of sphincter of Oddi + contraction of gall bladder to release bile

Question 5

what is the function of GIP

Answer 5

stimulates release of insulin from pancreatic beta-cells

and inhibits gastric emptying

Question 6

what is the function of GLP-1

Answer 6

stimulates insulin secretion, inhibits glucagon secretion, decreases gastric emptying and appetite

Question 7

what is the function of motilin

Answer 7

initiates MMC(peristalsis)

Question 8

what is the function ghrelin

Answer 8

stimulates appetite

Question 9

what does small intestine juice contain

Answer 9

mucus + aqueous salt

Question 10

what are the endocrine pancreatic secretions

Answer 10

insulin and glucagon(secreted to blood)

Question 11

what are the exocrine pancreatic secretions

Answer 11

digestive enzymes and aqueous HCO3 solution

secreted to duodenum collectively as pancreatic juice