we suggest that the ( na+ , k+ ) atpase on the basolateral surface is mainly responsible for the extrusion of a large number of sodium ions that are incorporated into the cytoplasm accompanying the secondary active transport of various organic substances and inorganic ions , whereas that on the luminal surface is responsible for active extrusion of sodium ions that are partially responsible for the fluid secretion of the pancreatic cells .
C0010834
cytoplasm
C0007634
cells