This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Constriction of efferent aeriolar produces: \nSelect and explain. \nA. Biphasic response on GFR, B. Increased per-tubular oncotic pressure, C. Increased per-tubular absorption, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Constriction of efferent aeriolar produces: Increased per-tubular oncotic pressure Decreased hydrostatic pressure Increased reabsorption of water In less than 3 fold increase in resistance GFR increases In more than 3 fold increase in resistance GFR decrease Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:471-474', 'role': 'assistant'}]