This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
[{'content': 'Efferent aeriole constriction causes \nSelect and explain. \nA. Increased GFR, B. Decreased GFR Increases, C. GFR initially then decreases, D. Decreased GFR initially then increase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The efferent aerioles are blood vessels that are pa of the urinary tract of organisms. The efferent aerioles form from a convergence of the capillaries of the glomerulus. They play an impoant role in maintaining the glomerular filtration rate despite fluctuations in blood pressure.Ref: Ganong&;s review of medical physiology; 24th edition; page no; 679', 'role': 'assistant'}]