At rest,
A) a neuron has a membrane potential of about -70 mV.
B) the electrical charge outside the neuron is 70 mV less than inside the neuron.
C) a neuron is polarized.
D) all of the above
E) both A and C

Question

Quizplus · Accepted Answer

Option A is correct as the rest potential of a neuron is approximately -70 mV. Option B is incorrect as it is the opposite of the actual situation; there is a negative charge inside the neuron compared to the outside. Option C is also correct as the rest potential represents the polarization of the neuron; hence, option E is the best choice.

At Rest