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': 'Arteriole is \nSelect and explain. \nA. Conducting vessel, B. Resistance vessel, C. Exchange vessels, D. Capacitance vessel', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Arterioles regulate the distribution of blood flow by altering their diameter to increase or decrease the peripheral resistance as required.', 'role': 'assistant'}]