surface nephrons were perfused downstream from a solid paraffin block through henle 's loop with isotonic saline solution containing either 10 ( -6 ) , 3 x 10 ( -6 ) , or 10 ( -5 ) mol/l piretanide , bumetanide , or furosemide , respectively .
C0027713
nephrons
C0023986
henle 's loop