MICROANATOMY

Detailed explanation-1: -The resting membrane potential of a neurone is the electrical potential, or voltage, across the plasma membrane of an unstimulated nerve cell. It occurs when the net flow of ions across the plasma membrane equals zero. In humans this is said to be around-70 mV.

Detailed explanation-2: -The membrane potential of unstimulated neuron is called the resting potential. The potential difference across the membrane is maintained thanks to the action of the active sodium-potassium pump, which powered by ATP, moves three sodium ions out of the cell for every two potassium ions that enter the cell.

Detailed explanation-3: -The electrical potential difference across the resting plasma membrane is called a resting potential. The resting membrane potential of a neuron is about-70 mV-this means that the inside of the neuron is 70 mV less than the outside.

Detailed explanation-4: -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-5: -Since the plasma membrane at rest has a much greater permeability for K+, the resting membrane potential (-70 to-80 mV) is much closer to the equilibrium potential of K+ (-90 mV) than it is for Na+ (+65 mV).