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': 'Which of the following statements regarding the regulation of gastrointestinal motility is true? \nSelect and explain. \nA. Sympathetic stimulation inhibits motility., B. Parasympathetic stimulation inhibits motility., C. Gastrointestinal motility is not influenced by the central nervous system (CNS)., D. Gastrointestinal motility is not influenced by hormones.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The gastrointestinal tract is regulated by both the sympathetic and parasympathetic branches of the autonomic nervous system.\nThe parasympathetic system is stimulatory and the sympathetic system is inhibitory. \nThe CNS does influence motility and secretory activity through the autonomic nervous system.\nNumerous endocrine factors (secretin, gastrin, cholecystokinin, etc.) are also involved with the regulation of gastrointestinal activity.', 'role': 'assistant'}]