$A$ nerve impulse is defined as .........

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.

For visual sense,the nerve impulse is generated by

What happens during depolarization of the nerve membrane?

What initiates the generation of a nerve impulse?

Action potential is also termed as