PATHOLOGY

Detailed explanation-1: -8. Approximately L of filtrate enters the nephrons each day; of that volume % is reabsorbed in the proximal tubule. B: Approximately 180 L of filtrate enters the nephrons each day; of that volume, 65% is reabsorbed in the proximal tubule.

Detailed explanation-2: -Evidences have demonstrated that 60%-70% of the filtered phosphorus is reabsorbed in the proximal tubule and there is also evidence that a significant amount of filtered phosphorus is reabsorbed in distal segments of the nephron [Table 1].

Detailed explanation-3: -Though the volume of blood kidney filters is 180 L a day then, why is the volume of urine only one to two litres ? Though the volume of blood filtered by the kidney is 180 L the volume of urine is just 1-2 litres because the remaining nutrients and water are reabsorbed in the kidney tubules.

Detailed explanation-4: -Over 70% the filtrate is reabsorbed here. In addition, many important solutes (glucose, amino acids, bicarbonate) are actively transported out of the proximal tubule such that their concentrations are normally extremely low in the remaining fluid.