This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Bezold-Jarish reflex response is \nSelect and explain. \nA. Tachycardia, B. Bradycardia, C. Hypeension, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Activation of chemosensitive vagal C fibers in the cardiopulmonary region (eg, juxtacapillary region of alveoli, ventricles, atria, great veins, and pulmonary aery) causes profound bradycardia, hypotension, and a brief period of apnea followed by rapid shallow breathing. This response pattern is called the Bezold-Jarisch reflexRef: Ganong&;s Review of medical physiology 25th edition. Page: 592', 'role': 'assistant'}]