to determine whether the intrinsic transport capacity of proximal tubule segments is altered by these maneuvers , we measured fluid volume reabsorption rate ( jv ) in isolated superficial proximal straight tubule ( pst ) segments perfused in vitro , comparing each control tubule ( obtained by biopsy of the left kidney immediately before an experimental maneuver ) with a corresponding tubule segment obtained 24 h or 7 d later from the contralateral kidney .
C0194073
biopsy of
C0022646
kidney