Saltatory conduction occurs in

$A$ neuron becomes an electrically charged cell primarily due to the differential permeability and diffusion of which ion?

For the propagation of a nerve impulse along a nerve fiber,what is the sequence of change in the electrical potential difference across the axolemma?

$A$: In the nervous system,the generation of an action potential depends upon the influx of sodium ions into the axoplasm.
$R$: The influx of sodium ions during nerve impulse generation is due to the efflux of potassium ions.

Which of the following acts is responsible for the depolarisation of the neuron?

During the resting state of a neural membrane,if diffusion is allowed due to concentration gradients,which ion is allowed to enter the cell?