Effect of CCK on gut is
CCK mediates digestion in the small intestine by inhibiting gastric emptying. It stimulates the acinar cells of the pancreas to release a juice rich in pancreatic digestive enzymes (hence an alternate name, pancreozymin) that catalyze the digestion of fat, protein, and carbohydrates Ref: guyton and hall textbook of medical physiology 12 edition page number:442,443,444
Increases gastric acid secretion
Increase small intestine peristalisis
Increases gastric motility
Relaxes gall bladder
Renal physiology