Which statement is TRUE regarding the Na⁺ voltage-gated channel in neurons? A) Similar to the potassium ion channel, it exists as a tetramer in the membrane. B) Positive membrane potentials on the extracellular side will close the channel. C) Aspartate residues are part of the voltage-sensing helices. D) Ion specificity comes from the voltage-sensing helices.

Question

Quizplus · Accepted Answer

Positive membrane potentials on the extracellular side will close the channel, as voltage-gated sodium channels are typically closed by depolarization and opened by a negative shift in membrane potential, which is opposite to the process described in the other options.

Which Statement Is TRUE Regarding the Na+ Voltage-Gated Channel in Neurons

Which Statement Is TRUE Regarding the Na⁺ Voltage-Gated Channel in Neurons