In a resting neuron, there is a difference in electrical charge across the cell membrane because A) voltage-gated channels in the membrane allow Na⁺ to enter the cell. B) the concentration of Na⁺ is higher inside than outside the cell. C) ion transporters require energy and are not active in a resting neuron. D) K⁺ ions are pumped through channels until they reach equilibrium. E) leak channels allow K⁺ ions to diffuse out of the cell.

Question

Quizplus · Accepted Answer

In a resting neuron, the difference in electrical charge across the cell membrane is due to the presence of leak channels. These channels allow K⁺ ions to slowly leak out of the cell, creating a net negative charge inside the cell compared to the outside. This creates a resting membrane potential, which is typically around -70mV in neurons. Options A, B, C, and D are incorrect because they do not accurately describe the underlying process that creates the resting membrane potential.

In a Resting Neuron, There Is a Difference in Electrical