GENERAL HISTOLOGY

Detailed explanation-1: -The resting membrane potential of a neuron is about-70 mV (mV=millivolt)-this means that the inside of the neuron is 70 mV less than the outside. At rest, there are relatively more sodium ions outside the neuron and more potassium ions inside that neuron.

Detailed explanation-2: -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-3: -When a neuron is at a resting phase i.e., it is not conducting any impulse, the axonal membrane is comparatively more permeable to potassium ions (K+) and impermeable to sodium ions (Na+) and to negatively charged proteins present in the axoplasm.

Detailed explanation-4: -The RMP of a typical neuron is about −65 mV, with the interior of the cell negative in charge to the outside. The basis for the RMP is the unequal distribution of ions, in particular K+ and Na+, on either side of the plasma membrane, with a K+ concentration of  140 mmol/l inside and 5 mmol/l outside the cell.