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': 'About aerioles true is \nSelect and explain. \nA. Resistance, B. Exchange, C. Reservoir, D. Pressure', 'role': 'user'}, {'content': "Answer: A \nExplanation: The small aeries and aerioles are referred to as resistance vessels because they are the principal site of the peripheral resistanceRef: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:543", 'role': 'assistant'}]