GI cells and secretions

Question 1

chief cells

Answer 1

pepsinogen - digests proteins

gastric body

lower 3rd gastric duct

Question 2

parietal cells

Answer 2

HCL and intrinsic factor

middle 3rd gastric duct

Question 3

gastroentero-endocrine cells

located in gastric ducts and ducts of leiberkuhn

Answer 3

lower 3rd of duct (throughout GI tract)

secretin
gastrin
CCK
glucose-dependent insulinotropic peptide GIP
motilin 
ghrelin

Question 4

secretin

Answer 4

stimulates release of HCO3- and fluid from pancreatic and duodenal (brunners glands)
>released in duodenal glad of lieberkuhn

Question 5

gastrin

Answer 5

stimulate HCL release, gastric motility

>released from G cells in pyloric antrum

Question 6

CCK

Answer 6

contracts gallbladder, relaxes sphincter of odie, contracts pyloric sphincter to slow emptying, stimulates pancreas
>released in duodenum

Question 7

glucose-dependent insulinotropic peptide GIP

Answer 7

stimulates insulin release when glucose in small intestine

>released in duodenum

Question 8

motilin

Answer 8

cyclically 90min release stimulates motility

Question 9

ghrelin

Answer 9

stimulates growth hormone, trigger hunger

released in fundus