The Resting Membrane Potential in a Typical Nerve Cell Is

Question

The resting membrane potential in a typical nerve cell is approximately
A) +70 mV.
B) -70 mV.
C) +35 mV.
D) -35 mV.
E) 0 mV.

Accepted Answer

The resting membrane potential in a typical nerve cell is approximately -70 mV. This means that the inside of the cell is negatively charged compared to the outside. This negative charge is maintained by the sodium-potassium pump, which pumps three sodium ions out of the cell for every two potassium ions pumped in. This creates an electrochemical gradient that contributes to the resting membrane potential.