The resting potential across a typical neuron membrane is approximately ____ inside relative to outside.
A)-70 microvolts
B) -70 millivolts
C) +70 volts
D) +70 millivolts
E) +70 megavolts

Question

The resting potential across a typical neuron membrane is approximately ____ inside relative to outside.  
A)-70 microvolts
B) -70 millivolts
C) +70 volts
D) +70 millivolts
E) +70 megavolts

Quizplus · Accepted Answer

The resting potential across a typical neuron membrane is approximately -70 millivolts inside relative to outside. This means that the inside of the neuron is negatively charged relative to the outside, which is positively charged, by 70 millivolts. This is maintained by the unequal distribution of ions across the neuronal membrane, with more sodium ions (Na+) outside the neuron and more potassium ions (K+) inside.

The Resting Potential Across a Typical Neuron Membrane Is Approximately