A membrane potential
A) refers to a difference in electrical charge on opposite sides of a membrane
B) is measured in millivolts, with the sign always designating the charge on the outside
C) exists because the ECF as a whole is positively-charged and the cytosol as a whole is negatively charged
D) is always positive during the resting state
E) all of these

Question

Quizplus · Accepted Answer

A membrane potential refers to a difference in electrical charge on opposite sides of a membrane. This charge difference is typically measured in millivolts and is created by the distribution of ions inside and outside of the cell. The sign of the potential can be either positive or negative, depending on the relative charges on either side of the membrane.

A Membrane Potential