This is this section here and this side of the cell is the apical side. So that means the other side, this side that points towards the interstituum is our basil lateral side. It points towards the basement membrane. Now, on the basil lateral side, we have this Atpace pump. And what it does is it uses a single ATP to move three sodium ions against its electrochemical gradient towards the outside of the cell towards the interstitium. At the same time it moves to potassium into the cell.