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': 'The function of myenteric plexus is mainly \nSelect and explain. \nA. Sympathetic, B. Motor, C. Mixed, D. Parasympathetic', 'role': 'user'}, {'content': "Answer: B \nExplanation: Enteric Nervous System (ENS)\n\nOrganized into ganglia interconnected by 2 plexuses:\n\n— Outer myenteric\xa0 (Auerbach's) plexus found along entire length of GI tract\n— Inner submucosal (Meissner's) plexus located only in small and large intestine\n\nENS contains 100 million neurons and similar diversity of neurotransmitters as CNS\n\n— Has interneurons, sensory, autonomic ganglia.\n— Peristalsis is controlled by ENS\nNOTE:\n\nMyenteric plexus is primarily concerned with motor control of longitudinal and circular muscles.\nMeissner plexus is mainly involved in intestinal secretions.", 'role': 'assistant'}]