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What is Renal filtration fraction is calculated as and explain in detail?
Renal filtration fraction= GFR/(RPF) The filtration fraction, is normally 0.16-0.20. The GFR varies less than the RPF. When there is a fall in systemic blood pressure, the GFR falls less than the RPF because of efferent aeriolar constriction, and consequently the filtration fraction rises.