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