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.
Many cells use electrical stimulation to communicate with each other. This process starts with depolarization. The lesson looks at the role of depolarization in the electrical communication within and between cells. AP Biology: Help and Review / Science Courses.