10.2 GI secretion Flashcards
1
Q
Which cells secrete gastrin?
A
G cells
2
Q
What hormone is secreted by S cells?
A
Secretin
3
Q
Which cells secrete CCK?
A
I cells
4
Q
What is the role of VIP?
A
Relax smooth muscle,
5
Q
What is the role of GIP?
A
- Reduces gastric acid secretion
- Stimulates insulin release
6
Q
What does motilin do?
A
Stimulates small bowel movement (MMC during fasting)
7
Q
Where is somatostatin secreted?
A
D cells
8
Q
What stimulates gastrin secretion?
A
Food
Gastric distension
Vagal stimulation
↑ gastric pH
9
Q
What inhibits gastrin secretion?
A
Somatostatin
Secretin → GIP, VIP, Glucagon
Acid pH
10
Q
What is the role of gastrin?
A
Stimulates HCl secretion (parietal cells)
Stimulates pepsinogen secretion (chief cells)
11
Q
What is the role of secretin?
A
↑ HCO3- from pancreas
↓ gastrin
12
Q
What is the role of CCK?
A
↑ gallbladder activity
