Filtration fraction is the ratio of

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(C) The filtration fraction is defined as the ratio of the Glomerular Filtration Rate $(GFR)$ to the Renal Plasma Flow $(RPF)$.Approximately $600-700

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$GFR$ and $RPF$

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(C) The filtration fraction is defined as the ratio of the Glomerular Filtration Rate $(GFR)$ to the Renal Plasma Flow $(RPF)$.Approximately $600-700 \, ml$ of plasma passes through the kidneys per minute,which is known as the Renal Plasma Flow $(RPF)$.Out of this,about $125 \, ml$ of filtrate is formed by the glomeruli per minute,which is the Glomerular Filtration Rate $(GFR)$.Therefore,the filtration fraction is calculated as:$	ext{Filtration fraction} = \frac{GFR}{RPF} = \frac{125}{650} \approx 0.19$ (or approximately $0.17-0.20$ depending on physiological values).Thus,the correct option is $(C)$.

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