Answer:
The distribution and balance of sodium and potassium between cells and tissue fluids is by means of a pump that requires ATP, that is, it is ATP dependent, and generates a countergrade of the minerals by balancing them, three sodium molecules are taken for two of potassium
Step-by-step explanation:
These pumps are activated at necessary and punctual times, they are not constantly active.
Being a countergrade means that you need energy to go against the spontaneous gradient of the membrane, to overcome it and achieve balance.
The sodium potassium pumps are FUNDAMENTAL for cell life since without them the cells could suffer from hyper or hypoteonicity of the concentrations of these minerals, thus generating serious failures and cell death.