The jumping of action potential from node to node (of $Ranvier$) in a nerve fibre is called:

What does the axoplasm of an axon contain in a resting state?

When a neuron is in a resting state,i.e.,not conducting any impulse,the axonal membrane is:

Which of the following statements is/are correct?
$(a)$ The electrical potential difference across the resting plasma membrane is called the resting potential.
$(b)$ $Na^+$ ions are responsible for the generation of an action potential.
$(c)$ $A$ nerve impulse is an action potential.

Saltatory conduction occurs in

$A$ nerve impulse is generated in a nerve fiber when the membrane becomes more permeable to: