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': 'Emptying of stomach is facilitated by: September 2012 \nSelect and explain. \nA. Secretin, B. CCK-PZ, C. GIP, D. Gastrin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. GastrinGastrinIt is a peptide hormone that stimulates secretion of gastric acid (HC1) by the parietal cells of the stomach and aids in gastric motility.It is released by G cells in the antrum of the stomach (the poion of the stomach adjacent the pyloric valve), duodenum, and the pancreas.Its release is stimulated by peptides in the lumen of the stomach.', 'role': 'assistant'}]