hormonal control of digestion

Question 1

activities of the gastra-intestinal tract are under the control of what?

Answer 1

neural and hormonal control for proper coordination.

Question 2

what stimulates the secretion of saliva?

Answer 2

sight, smell and presence of food in the oral cavity.

Question 3

explain the hormone gastrin?

Answer 3

1) source:stomach
2) target stomach:
3) action:stimulate gastric gland to secrete and release gastric juice

Question 4

explain the hormone enterogastrone(gastric inhibitory peptide-GIP)?

Answer 4

1) source: duodenum
2) target:stomach
3) action:inhibits gastric secretion and motility (slows gastric contraction)

Question 5

explain the hormone secretin?

Answer 5

• -first hormone discovered by scientists
  1) source: duodenum

2)target:stomach,liver and pancrease

3) action:
- ihibits gastric secretion and motility
- increae the secreation of bile
- releases bicarbonates in pacreatic juice

Question 6

explain the hormone chloecystokinin - pancreozymin(CCK-PZ)

Answer 6

1) source: duodenum
2) target:small intestine

3) action:
- contracts the gall bladder to release bile
- stimulates the pancreas to secrete enzymes in the pancreatic juice

Question 7

explain the hormone duocrinine?

Answer 7

1) source: duodenum
2) target: duodenum
3) action: stimulates the burners gland to release enzymes and mucus into the small intestine

Question 8

explain the hormone entrocrinine?

Answer 8

1) source: small intestine
2) target: small intestine
3) action: stimulates the crypts of leiburkhun to release enzyme into the intestinal juice

Question 9

explain the hormone vasoactive intestinal peptide(VIP)?

Answer 9

1) source: small intestine
2) target: stomach and small intestine

3) action:
- dialates the peripheral blood vessels of the gut.
- inhibits gastric acid secretion in the stomach

Question 10

explain the hormone entrocrinine?

Answer 10

1) source: small intestine
2) target: small intestine
3) action: stimulates the crypts of leiburkhun to release enzyme into the intestinal juice

Question 11

explain the hormone vasoactive intestinal peptide(VIP)?

Answer 11

1) source: small intestine
2) target: stomach and small intestine

3) action:
- dialates the peripheral blood vessels of the gut.
- inhibits gastric acid secretion in the stomach