The potential difference across the membrane of a relaxed muscle fibre is called resting potential. It amounts to about

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.

The conduction of a nerve impulse is ....

What is resting potential?

During the nerve impulse (action potential),which ion has the highest permeability in the membrane?

To start the conduction of an impulse,the value of the action potential must not be