taipei817 wrote:
C... lousy derivation: creatine & urea are regulated substance. inulin rep RPF which shouldnt change much as well as the GFR which is rep by creatine clearance
inulin represents gfr not rpf
pah represents RPF
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| jean robert
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docdoc9 wrote:
e.Urea
High flow rate indicates low ADH therefore decreased reabsopbtion of urea and increased clearance
Correct answer E
Urine flow rate is controlled primarily by ADH, which regulates the amount of pure water retained in the urine.
ADH also controls the reabsorption of UREA in the papillary collecting duct. High urine flow rates indicate low ADH, which would increase urea clearance.
In contrast, low urine flow rates indicate high ADH, which would result in a greater reabsorption of urea and a lower urea clearance.
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| jean robert
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The concentration (and osmolarity) of all other solutes (choices A,B,C, and D) varies inversely with urine flow rate, resulting in no change in clearance. Recall that
Clearance= (urine concentration x urine flow rate) / plasma concentration.
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