<P> Fluid in the filtrate entering the proximal convoluted tubule is reabsorbed into the peritubular capillaries . This is driven by sodium transport from the lumen into the blood by the Na / K ATPase in the basolateral membrane of the epithelial cells . Sodium reabsorption is primarily driven by this P - type ATPase . This is the most important transport mechanism in the PCT . </P>
explain how epithelial cells of the proximal convoluted tubule are adapted for reabsorption
Fluid in the filtrate entering the proximal convoluted tubule is reabsorbed into the peritubular capillaries . This is driven by sodium transport from the lumen into the blood by the Na / K ATPase in the basolateral membrane of the epithelial cells .