In a typical epithelial cell na, k-atpase is restricted to:

In a typical epithelial cell na, k-atpase is restricted to the domain of the plasma membrane of the cell. The enzyme is distributed in a polarized manner within this restriction and is a crucial element in transporting substances across epithelia by creating the ionic gradients that drive the net movement of glucose, amino acides, and ions.

2hydrogen and 1 covalent