GENERAL HISTOLOGY

Detailed explanation-1: -Because there is a potential difference across the cell membrane, the membrane is said to be polarized. If the membrane potential becomes more positive than it is at the resting potential, the membrane is said to be depolarized.

Detailed explanation-2: -the outside, called a resting membrane potential. Specifically, the inside of the cell has a negative charge just inside the cell membrane, with a higher concentration of Potassium ions inside the cell; the outside of the cell has a postive charge, with a higher concentration of Sodium ions.

Detailed explanation-3: -A neuron at rest is negatively charged: the inside of a cell is approximately 70 millivolts more negative than the outside (−70 mV, note that this number varies by neuron type and by species).

Detailed explanation-4: -Simply stated, membrane potential is due to disparities in concentration and permeability of important ions across a membrane. Because of the unequal concentrations of ions across a membrane, the membrane has an electrical charge.