Sodium (Na⁺)is unable to cross a membrane until a local change in the membrane potential occurs.This suggests that Na⁺ transfer across membranes is controlled by a(n) A) voltage-gated ion channel. B) ligand-gated ion channel. C) stretch-gated ion channel. D) ion channel that is always open. E) ion channel that is always closed.

Question

Quizplus · Accepted Answer

Voltage-gated ion channels open and allow ion transfer only when there is a change in membrane potential. Therefore, a local change in the membrane potential is required for the transfer of Sodium (Na⁺) across the membrane, suggesting that the transfer is controlled by a voltage-gated ion channel.

Sodium (Na+)is Unable to Cross a Membrane Until a Local

Sodium (Na⁺)is Unable to Cross a Membrane Until a Local