Resting membrane potential is maintained by

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

The potential difference between the outside and inside of a nerve fiber before excitation is known as:

Select the correct option for the permeability of the axonal membrane in a resting state for $K^{+}$,$Na^{+}$,and negatively charged proteins.

What initiates the generation of a nerve impulse?

Give scientific reasons:
$(1)$ In an excited nerve fibre region,a positive charge is created inside the plasma membrane.
$(2)$ In some animals,the conduction of nerve impulses is saltatory.