L12 GI

Question 1

Four main hormones in digestion

Answer 1

Gastrin
Cholecystokinin
Secretin
Glucose dependent insulinotropic peptid

Question 2

Phases of GI

Answer 2

Cephalic
Gastric
Intestinal

Question 3

Cells of gastric pit

Answer 3

Mucous neck cells
Chief cells
Parietal cells

Question 4

Glandular areas

Answer 4

Oxyntic:body and fundus
Pyloric: antrum

Question 5

HCl secretion

Answer 5

Parietal cells in fundus and body

Question 6

Intrinsic factor secretion

Answer 6

Parietal cells in fundus and body

Question 7

Pepsinogen secretion

Answer 7

Chief cells in body and antrum

Question 8

Secretion of HCl

Answer 8

CO2 H2O CA make HCO3 and H
Cl in, HCO3 out (blood)
Hout/Kin atpase
Clout, combines with H in lumen

Question 9

Inputs to parietal cells for HCl

Answer 9

Histamine is strongest

Gastrin and Ach trigger Histamine and have direct effects

Question 10

Somatostatin mechanism

Answer 10

Secreted by D cell
inhibits gastrin by G cell (histamine indirectly)
Inhibits Parietal cell directly

Question 11

When Chyme drops below pH 3, what happens

Answer 11

Secretin is produced

Question 12

Enterogastrones

Answer 12

Secretin and CCK

Inhibit secretion and motility in stomach

Question 13

CCK is stimulated by and leads to

Answer 13

amino acids
Fatty acids
Leads to Pancreas enzymes
Bile flow from gallbladder

Question 14

Secretin is stimulated by and leads to

Answer 14

High H+

Leads to pancreas HCO3

Question 15

Peristalsis is driven by

Answer 15

myoelectric complex

Motilin hormone

Question 16

Primary purpose of Large intestine

Answer 16

Na reabsorption