Question

which of the following voltage best approximates the resting membrane potential (rmp) of a neuron? a.) -70 mv b.) -55 mv c.) 0 mv d.) 30 mv

Explanation:

The resting membrane potential (RMP) of a neuron is the electrical potential difference across the cell membrane when the neuron is at rest. It is maintained by the selective permeability of the membrane to ions such as potassium (\(K^+\)), sodium (\(Na^+\)), and chloride (\(Cl^-\)). The sodium - potassium pump also plays a role in establishing and maintaining this potential. Through the combined action of ion channels and the pump, the RMP of a typical neuron is approximately - 70 mV. - 55 mV is close to the threshold potential (the membrane potential at which an action potential is initiated), 0 mV and 30 mV are not typical resting potentials as the inside of the neuron is more negatively charged compared to the outside at rest.

Answer:

A. -70 mV