Hormones - GI

Question 1

What are the 4 GI hormones?

Answer 1

1. Gastrin
2. Cholecystokinin
3. Secretin
4. Gastric inhibitory polypeptide

Question 2

What is the source for gastrin?

Answer 2

Gastrin - G cells in gastric pits

Question 3

What is the source for CCK?

Answer 3

CCK - Mucosal epithelial cells - duodenum

Question 4

What is the source for secretin?

Answer 4

Secretin - Mucosal epithelial cells - duodenum

Question 5

What is the source for GIP?

Answer 5

GIP - Mucosal epithelial cells - duodenum

Question 6

What is the stimuli for gastrin?

Answer 6

Peptides and amino acids in the stomach

Question 7

What is the stimuli for CCK?

Answer 7

Fatty acids and amino acids in the small intestine

Question 8

What is the stimuli for secretin?

Answer 8

Acidic pH in small intestine

Question 9

What is the stimuli for GIP?

Answer 9

Fat and glucose in the small intestine

Question 10

What is the action of gastrin?

Answer 10

Stimulate gastric acid secretion (HCl) and stomach motility

Question 11

What is the action of CCK?

Answer 11

Stimulate secretion of pancreatic enzymes and bile from gallbladder

Question 12

What is the action of secretin?

Answer 12

Secretion of water and bicarbonate (HCO3) from pancreas and bile ducts

Question 13

What is the action of GIP?

Answer 13

• Inhibit gastric acid secretion (HCl) and motility

- Release of insulin from beta cells as a response to high blood glucose