Question

multiple choice question
what is the resting membrane potential?
the mechanism of voltage gated sodium channels opening when they reach threshold in the axon
the conduction of an action potential down the length of the axon
the ability of the plasma membrane to keep a positive charge on the outer surface and a negative charge on the inner surface
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Explanation:

The resting membrane potential is the electrical potential difference across the plasma membrane of a cell at rest. It is maintained by the selective permeability of the membrane to ions and the action of ion pumps. The plasma membrane keeps a positive charge on the outer surface and a negative charge on the inner surface, creating a potential difference.

• The first option describes the mechanism of voltage - gated sodium channels opening during an action potential, not the resting membrane potential.
• The second option describes the conduction of an action potential, which is a dynamic process and not related to the resting state.

Answer:

the ability of the plasma membrane to keep a positive charge on the outer surface and a negative charge on the inner surface