<prompt> What is glomerular filtration rate? March 2008100 mlmin125 mlmin150 mlmin175 ml min  <response>: Ans. B: 125 mlminThe GFR in an average-sized normal man is approximately 125 ml.min.Its magnitude correlates fairly well with surface area, but values in women are 10 lower than those in men even after correction for surface area. A rate of 125 mL min is 7.5 Lh, or 180 Ld, whereas the normal urine volume is about 1 Ld. Thus, 99 or more of the filtrate is normally reabsorbed. At the rate of 125 mL min, the kidneys filter in 1 day an amount of fluid equal to 4 times the total body water, 15 times the ECF volume and 60 times the plasma volume. 