This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Gallbladder contraction is stimulated by \nSelect and explain. \nA. Gastrin, B. Secretin, C. Vagus, D. Cholecystokinin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Actions of CCK\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Stimulates pancreatic enzymes secretion.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Stimulates enterokinase secretion.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Stimulates insulin secretion.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Stimulates glucagon secretion.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Potentiates Secretin\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Increases pyloric sphincter tone.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Inhibits gastric emptying\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Stimulates gall bladder contraction\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Stimulates small intestinal and colonic motility\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Relaxes lower esophageal sphincter\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Trophic effect on the pancreas', 'role': 'assistant'}]