Final answer:
The order of events in a single action potential is depolarization, repolarization, hyperpolarization, and return to resting potential.
Step-by-step explanation:
The order of events in a single action potential is: Depolarization, repolarization, and hyperpolarization, followed by the return to resting potential. During depolarization, sodium channels open and sodium ions enter the cell, causing the cell membrane voltage to rise rapidly. Repolarization occurs when potassium channels open, allowing potassium ions to leave the cell and restore the negative charge inside the cell membrane. Hyperpolarization happens when the cell membrane voltage drops below the resting potential before returning back to rest.