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': 'All the following causes the secretion of gastric juice during cephalic phase EXCEPT ¬ \nSelect and explain. \nA. Food in the mouth, B. Sight of food, C. Food in the stomach, D. Thought of food', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Secretion of gastric juice occurs in 3 phases- cephalic, gastric and intestinal.\na) Cephalic phase (only nervous)\nThe secretion of gastric juice by stimuli arising from head region (Sight, smell, thought and hearing about food) is called cephalic phase.\nThe gastric secretion occurs even without presence of food in stomach. The gastric juice secreted during this phase is called appetite juice.\nTaste (food in mouth)\n\xa0↓\nStimulation of vagus\n↓\nSecretion of gastric juice\nb) Gastric phase (Nervous and hormonal) The secretion of gastric juice when food enters the stomach is called gastric phase.\nBolus in stomach\n\xa0↓\nVagus, Local nerves, Gastrin\n\xa0↓\nStimulation\n\xa0↓\nSecretion of gastric juice\nc) Intestinal phase (Hormonal)\nIntestinal phase is period of secretion of gastric juice when the chyme enters the intestine.', 'role': 'assistant'}]