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.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey