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Old 07-22-2012
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Kidney Filtration fraction versus GFR

What is the difference btwn filtration fraction and GFR? They seem to be the same yet they have different reactions to increases and decreases in blood flow.
-An increase in renal blood flow will increase GFR bc more fluid will be present to be filtered across the glomerulus.
-An increase in renal blood flow will decrease filtration fraction bc according to Kaplan.
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Old 07-22-2012
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What are u talking about?Ff & GFR are not same
GFR= uv/p(using creatinine)
FF= GFR/RPF
RPF=uv/p(using PAH)
Normal GFR = 120mls/min
Normal RPF= 600mls/min

Hence normal FF=120/600 = 20%

U have to know what affect these parameters at either afferent or efferent arteriole
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