Jena Is Reviewing Her Notes on Action Potentials for a Quiz

Multiple Choice

 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