Theoretically, a recognized member of the modern state system possessing formal sovereignty and occupied by a people who see themselves as a single, united nation. Most nations and states aspire to parlance, nation-state is used as a synonym for country or state.
In biology, depolarization is a decrease in the absolute value of a cell's membrane potential. Thus, changes in membrane voltage in which the membrane potential becomes less positive or less negative are both depolarizations.
Depolarization and repolarization. Virtually every cell in our body is electrically charged. Also there is a difference in charge between the inside of the cell (the intracellular space) and the outside of the cell (the extracellular space).