The only ion(s)that can diffuse across a neuron's membrane when the neuron is at rest is(are):
A) sodium.
B) potassium.
C) proteins.
D) phosphate.

Question

Quizplus · Accepted Answer

At rest, the neuron's membrane is selectively permeable to potassium ions, allowing them to diffuse across the membrane due to the concentration gradient. Sodium ions do not easily diffuse across the membrane at rest, as their movement is primarily controlled by voltage-gated channels that are closed at rest. Proteins and phosphate ions are too large to pass through the membrane.

The Only Ion(s)that Can Diffuse Across a Neuron's Membrane When