The function of "sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

The function of "sodium pump" is a biological process operating in each and every cell of all animals. K+ ion, a biologically important ion, is also a constituent of this pump. Na+ is a major cation present in blood plasma (outside cells). K+ is a major cation present in cytoplasm (inside the cells). Higher concentration of K+ and lower concentration of Na+ ion is present inside cell and tissue. Lower concentration of K+ and higher concentration of Na+ ion is present in fluid, bathing cells and tissues (blood plasma).