<prompt> Percentage of GFR to renal plasma flow:a.. 20b. 38c. 50d. 60  <response>: Ans. a 20Ref: Guytons physiology 11th ed. 316 GFR Is About 20 Per Cent of the Renal Plasma Flow. In an average adult GFR is about 125 mlmin, or 180 L day. Renal plasma flow is 650mlmin The filtration fraction is calculated as follows: Filtration fraction GFRRenal plasma flow Therefore125mlmin---650mlmin 0.2 The fraction of the renal plasma flow that is filtered the filtration fraction averages about 0.2; this means that about 20 per cent of the plasma flowing through the kidney is filtered through the glomerular capillaries.Also Know The entire plasma volume is only about 3 liters, whereas the GFR is about 180 Lday, the entire plasma can be filtered and processed about 60 times each day. 