What effect would a chemical that blocks voltage-gated sodium ion channels in a neuron's plasma membrane have on its membrane potential?
A)The membrane potential would become more positive because more sodium ions would leave the cell.
B)The membrane potential would become more negative because more sodium ions would leave the cell.
C)The membrane potential would become more positive because more sodium ions would enter the cell.
D)The membrane potential would become more negative because more sodium ions would enter the cell.
E)The membrane potential would not change because sodium could not enter the cell.

Question

Quizplus · Accepted Answer

Blocking voltage-gated sodium ion channels would prevent sodium ions from entering the neuron, which is crucial for depolarization during action potential generation. Without sodium influx, there would be no change in membrane potential from its resting state, assuming no other compensatory mechanisms are activated.

What Effect Would a Chemical That Blocks Voltage-Gated Sodium Ion