Where are CCK and Secretin made?
What are they activated by? (2,1)
What do they do? (2,1)
What organs do they act on? (1, 2)
CCK: made in mucosal cells of lower duodenum/jejunum; Secretin: other intestinal cells
Activated by (CCK): partially digested lipids/proteins; (secretin): low pH of chyme
CCK causes gallbladder to release bile AND decreases gastric motility.
Seretin acts on liver and pancreas to release soln rich in bicarbonate to neutralize pH for optimal pancreatic enzyme activity.