the results indicate that ( a ) during hydropenia , fractional reabsorption of sodium and water is decreased along the medullary cd of the stage-iii remnant kidney in the presence of mild uremia , ( b ) the increased fractional excretion of potassium in the remnant kidney with uremia is not determined by altered potassium handling in the medullary cd but occurs proximal to this nephron segment , and ( c ) extracellular fluid volume expansion with isotonic saline results in similar inhibition of fractional sodium and water reabsorption in the collecting ducts of both remnant and normal kidneys .
C0022646
kidney
C0027713
nephron