these results therefore indicate ( a ) that reductions in kf and depressed sodium reabsorption by proximal tubules and henle 's loop segments in this model are brought about by intrarenal rather than circulating or systemic factors , and ( b ) assuming that superficial nephrons are representative of the entire nephron population , renal salt retention in this model is due primarily to intrarenal factor ( s ) acting beyond the distal convolution .
C0027713
nephrons
C0022646
renal