Topic 5 Digestive System: Hormones Involved in Digestive Process

Question 1

• Produced by stomach lining when food reaches the stomach or upon sensing of food

Answer 1

Gastrin

Question 2

• Local peptide hormone from SI, produced by cells lining duodenum in response to HCl; stimulates pancreas to produce bicarbonate (neutralizes the chyme)

Answer 2

Secretin

Question 3

• Secreted by small intestine in response to fat digestates; stimulates gallbladder to release bile and pancreas to release its enzymes. Also decreases motility of stomach -> more time for duodenum to digest fat

Answer 3

Cholecystokinin

Question 4

• Produced in response to fat/protein digestates in duodenum; effect = mild decrease of stomach motor activity

Answer 4

Gastric Inhibitory Peptide

Question 5

• Enterogastrone is any hormone secreted by the duodenum in response to lipids that inhibits forward movement of chyme. Includes secretin, CCK, GIP, etc. Inhibits peristalsis and acid secretion by the stomach.

Answer 5

Note