How would a chemical that prevents the opening of voltage-regulated Na+ channels affect the function ofa neuron?
A) The neuron will only be able to hyperpolarize.
B) The neuron will depolarize more rapidly.
C) Action potentials will lack a repolarization phase.
D) The neuron will automatically and repeatedly produce graded potentials.
E) The neuron will only be capable of producing graded potentials.

Question

Quizplus · Accepted Answer

Preventing the opening of voltage-regulated Na+ channels would inhibit the neuron's ability to depolarize, which is necessary for generating action potentials. Thus, the neuron would only be capable of producing graded potentials, which are smaller changes in membrane potential that do not depend on these channels.

How Would a Chemical That Prevents the Opening of Voltage-Regulated