At which point is the osmotic concentration of filtrate highest? A)as it leaves the glomerular capsule B)as it enters the proximal convoluted tubule C)as it enters the descending limb of the nephron loop D)at the deepest point of the nephron loop between the descending and ascending limbs of the nephron loop E)as it blends with tubular fluid in the distal convoluted tubule

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Quizplus · Accepted Answer

The osmotic concentration of filtrate is highest at the deepest point of the nephron loop between the descending and ascending limbs. This is because water is reabsorbed from the filtrate as it descends into the more concentrated medullary interstitial fluid, increasing the filtrate's concentration.

At Which Point Is the Osmotic Concentration of Filtrate highest