K⁺ and Na⁺ voltage-gated channels are ____ in a resting neuron and ____ during an action potential.

A) open; closed
B) open; open
C) closed; open
D) closed; closed
E) sometimes open; sometimes closed

Voltage-gated Channels

Protein channels that open or close in response to changes in membrane potential, allowing ions to enter or exit cells and facilitate electrical signaling.

Resting Neuron

A neuron in its non-excited state, maintaining a stable negative charge inside the cell relative to the outside, ready to transmit signals when activated.