Effect of CCK on gut is
Increases gastric acid secretion
Increase small intestine peristalisis
Increases gastric motility
Relaxes gall bladder
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
Renal physiology