Friday, April 10, 2009

USMLE STEP 1 QUESTION OF THE DAY


The clearances of several substances is measured at constant GFR and urine flow rate, but at increasing plasma concentration of the substance. Under these conditions, clearance will increase at high plasma cocentrations for which of the following....
A) CREATININE
B) MANNITOL
C) PENICILLIN
D) PHOSPHATE
E) UREA

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