Question

if a neuron had a mutation that prevented the production of voltage gated Na+ channels, what function would the neuron NOT be able to accomplish?

Answer 1

The answer is generation and propagation of action potential.

Na+ channels are important for generation and propagation of action potential. In normal neurons, when neurons hit threshold and action potential is triggered, the Na+ channels open and Na+ ions enter the neuron. After the depolarization of membrane, Na+ channels inactivate. Thus, without Na+ channels, neurons would not be able to depolarize and consequently, the action potential would not be generated.