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#1
11-10-2011
 USMLE Forums Scout Steps History: Not yet Posts: 55 Threads: 21 Thanked 10 Times in 10 Posts
Calculating the tubular reabsorption!

Substance X is freely filterable and is neither metabolized nor stored in the kidney. The plasma concentration of X is 1 mg/mL, and 25 mg of X/min appears in the urine. The inulin clearance is l00 mL/min. The tubular reabsorption of X (in mg/min) is
(A) 25
(B) 75
(C) 250
(D) 750
(E) 2500

#2
11-10-2011
 USMLE Forums Guru Steps History: 1 + CS Posts: 300 Threads: 22 Thanked 97 Times in 62 Posts Reputation: 107

Filtered load = 100 * 1 =100
reabsorbtion= 100-25 =75
 The above post was thanked by: Ali Khaliq (03-05-2016)

 Tags Physiology-, Renal-, Step-1-Questions

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