Which of the following statements concerning the permeability of a typical neuron membrane at rest is TRUE? A) The permeability to Na⁺ is much greater than the permeability to K⁺. B) All of the K⁺ channels in the membrane are open. C) The voltage-gated Na⁺ channels are in the inactivated state. D) Most of the voltage-gated Na⁺ channels are in the closed state. E) There is equal permeability to Na⁺ and K⁺.

Question

Quizplus · Accepted Answer

At rest, most of the voltage-gated Na+ channels are in the closed state. This accounts for the low permeability of the membrane to Na+ at rest. The permeability to K+ is relatively high due to the presence of leak channels that are always open. Therefore, option D is the correct statement.

Which of the Following Statements Concerning the Permeability of a Typical