MEDICAL PHYSIOLOGY

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: -The relative excess of positive charges outside and negative charges inside the membrane of a nerve cell at rest is maintained because the lipid bilayer acts as a barrier to the diffusion of ions, and give rise to an electrical potential difference, which ranges from about 60 to 70 mV.

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: -The combination of the sodium-potassium pump and the leaky channels results in the cell maintaining a stable, negative, resting membrane potential.

Detailed explanation-5: -A neuron has a resting potential of-70 mV and a threshold voltage of-50 mV. There are currently three active synapses on the neuron’s dendrites, each located the same distance from the axon.