Question

When voltage-gated K+ channels of a resting neuron open,

A. K+ enters the neuron.

B. K+ leaves the neuron.

C. the neuron depolarizes.

D. K+ enters the neuron and the neuron depolarizes.

E. K+ leaves the neuron and the neuron depolarizes.

Answer 1

When voltage-gated K+ channels of a resting neuron open, K+ leaves the neuron to repolarize the membrane.

Step-by-step explanation:

When voltage-gated K+ channels of a resting neuron open, K+ leaves the neuron. This process is called repolarization. As K+ ions leave the cell, the membrane potential becomes negative again, restoring the resting potential of the neuron. Therefore, the correct answer is B. K+ leaves the neuron.