Question

The only ion(s) that can diffuse across a neuron's membrane when the neuron is at rest is (are):

Answer 1

In its resting state, a neuron's membrane is permeable to K+ and Cl- ions, but impermeable to Na+ ions.

Step-by-step explanation:

In its resting state, the cell membrane of a neuron is permeable to K+ (potassium ions) and Cl- (chloride ions), but impermeable to Na+ (sodium ions).

Diffusion of K+ and Cl- ions across the membrane creates layers of positive and negative charge on the outside and inside of the membrane, respectively.

Therefore, the only ion(s) that can diffuse across a neuron's membrane when the neuron is at rest are K+ and Cl- ions.