Question

During nerve conduction, inactivation of voltage-gated Na+ channels is triggered by:

(a) Reversal of membrane potential

(b) Depolarization of the membrane

(c) Hyperpolarization of the membrane

(d) Binding of neurotransmitters to the postsynaptic membrane

Answer 1

The inactivation of voltage-gated Na+ channels during nerve conduction is triggered by depolarization of the membrane.

Step-by-step explanation:

The inactivation of voltage-gated Na+ channels during nerve conduction is triggered by depolarization of the membrane. When a neuron is depolarized to at least the threshold of excitation, an action potential is fired. During repolarization, the inactivation gate of the voltage-gated Na+ channel closes, preventing any further influx of Na+ ions.