Hormones in the GIT

Question 1

Gastrin

Answer 1

• stomach
• stimulates parietal cells to secrete HCL and chief cells to secrete pepsinogen
• maintains structure of mucosa

Question 2

Secretin

Answer 2

• found in small intestine
• stimulates water and bicarbonate secretion in pancreatic juice
• potentiates action of CCK on pancreas

Question 3

CCK

Answer 3

• found in small intestine
• stimulates contraction of gallbladder
• stimulates secretion of pancreatic juice enzymes
• inhibits gastric motility and secretion
• maintains structure of exocrine pancreas

Question 4

Gastric Inhibitory Peptide (GIP)

Answer 4

• Found in small intestine
• Inhibits gastric motility and secretion
• stimulates secretion of insulin from pancreatic islets

Question 5

Glucagon like peptide 1 (GLP-I)

Answer 5

• found in ileum and colon
• inhibits gastric motility and secretion
• stimulaters secretion of insulin from pancreatic islets

Question 6

guanylin

Answer 6

• stimulates intestinal secretion of Cl-, causing elimination of water and NaCL in the feces