This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'A patient suffers a severe hemorrhage resulting in a lowered mean aerial pressure. Which of the following would be elevated above normal levels? \nSelect and explain. \nA. Splanchnic blood flow, B. Cardiopulmonary receptor activity, C. Right ventricular end-diastolic volume, D. Hea rate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The hea rate would be elevated by the increased sympathetic activity and decreased parasympathetic activity caused by the baroreceptor reflex.', 'role': 'assistant'}]