Why does increasing renal blood flow within physiological limits enhance drug clearance, assuming glomerular filtration is the primary elimination pathway?

💡 Explanation

Enhanced renal blood flow elevates the hydrostatic pressure in glomerular capillaries, which leads to an increased glomerular filtration rate. Because this directly elevates the filtration fraction, drug clearance rises; therefore, the answer is B rather than the others, which affect tubular handling or hepatic metabolism.

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