Alimentary Systems - Hormones and their Functions Flashcards Preview

LSS 2 > Alimentary Systems - Hormones and their Functions > Flashcards

Flashcards in Alimentary Systems - Hormones and their Functions Deck (14)
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1
Q

What affects gastrin secretion?

A
  • In the stomach it is stimulated by distention
  • In the duodenum it is stimulated by high pH and amino acids
  • The PNS increases production via the vagus nerve
2
Q

List the effects of gastrin after secretion

A
  • Increases acid production via histamine

- Increases stomach motility

3
Q

Which cells produce gastrin?

A

G cells in the antrum of the stomach

4
Q

What affects cholecystokinin secretion?

A
  • Low pH in the stomach

- Fatty acids and peptides in the duodenum

5
Q

List the effects of cholecystokinin after secretion

A
  • Decreased motility
  • Increased bile release in the hepatobiliary system
  • Increased enzyme production in the pancreas
6
Q

Which cells produce cholecystokinin?

A

I cells

7
Q

What affects secretin secretion?

A
  • Low pH in the stomach

- Low pH in the duodenum

8
Q

What is the effect of secretin?

A
  • Decreased acid and gastrin production in the stomach

- Increased bicarbonate production in the pancreas

9
Q

List the stimuli of GIP

A

Amino acids, glucose and fatty acids in the duodenum

10
Q

List the effects of GIP

A
  • Inhibits acid production in the stomach

- Increases insulin secretion in the pancreas

11
Q

What cells produce secretin?

A

S cells in the duodenum

12
Q

Which cells produce GIP?

A

L cells, mainly in the proximal duodenum

13
Q

List the stimuli of somatostatin

A
  • Low pH in the stomach

- Inhibited by vagus nerve stimulation

14
Q

List the effects of somatostatin

A
  • In the stomach, decreased acid and pepsinogen
  • In the intestine, decreased bicarbonate and decreased absoroption
  • In the pancreas, decreased insulin, glucagon, enzymes and bicarbonate