Final answer:
Na+ channels adopt the same three conformations as K+ channels during depolarization and repolarization in an action potential.
Step-by-step explanation:
Na+ channels adopt the same three conformations as K+ channels during the depolarization and repolarization phases of an action potential. During depolarization, Na+ channels open and allow Na+ ions to enter the cell, leading to the rising phase of the action potential. After reaching the peak, these channels close and K+ channels open, allowing K+ ions to leave the cell and leading to repolarization.