Digestive

Question 1

gastrin stimulus for release and action

Answer 1

• Stimulus for release = food in stomach
• Actions = cause parietal cells to release HCl, stimulate pancreatic enzyme secretion

Question 2

secretin stimulus for release and action

Answer 2

• Stimulus for release = acidity and food in duodenum
• Actions = release bicarb into proximal SI, prevent further HCl secretion

Question 3

CCK stimulus for release and action

Answer 3

• Stimulus for release = food in duodenum
• Actions = gallbladder contraction, pancreatic enzyme secretion

Question 4

somatostatin stimulus for release and action

Answer 4

• Stimulus for release = gastrin, VIP
• Actions = inhibits release of almost all GI hormones. Endocrine off switch

Question 5

GIP stimulus for release and action

Answer 5

• Stimulus for release = food in duodenum
• Actions = stimulate insulin secretion, inhibit gastric acid and gastric emptying

Question 6

motilin stimulus for release and action

Answer 6

• Stimulus for release = ACh
• Actions = GI motility between meals, inhibits most GI functions including acid secretion