Jena is reviewing her notes on action potentials for a quiz. She makes an extra notation that before the action potential when the neuron is at rest, sodium channels _____.
A) are open and allow sodium ions to flow through easily
B) are closed and don't allow sodium to pass through.
C) are partially open, so sodium leaks through slowly
D) are partially open but at equilibrium, so the sodium doesn't move

Question

Quizplus · Accepted Answer

When the neuron is at rest, the sodium channels are closed and do not allow sodium to pass through. At this stage, the neuron is in a polarized state, with a negative charge on the inside and a positive charge on the outside.

Jena Is Reviewing Her Notes on Action Potentials for a Quiz