At resting stage permeability of `K^(+)` ion is more comparatively `Na^(+)` ion through axonal membrane

What is the role of Na^(+) - K^(+) pumps in the axonal membrane ?

What is the role of Na^(+) - K^(+) pumps in the axonal membrane ?

Given below are the steps involved in the generation and conduction of nerve impulse. Arrange them in proper sequence and select the correct option. I. Rapid influx of Na^+ ions followed by reversal of polarity at the site of application of stimulus. II. Reversal of polarity and generation of action potential at a point ahead of the point of application of stimulus. III. Development of free permeability to Na^+ ions at the site of application of stimulus. IV. Arrival of the impulse generated at the first site to the second site. V. Rise in permeability of K^+ ions and restoration of the resting potential of the membrane.

During resting condition, the axonal membrane is

During resting condition, the axonal membrane is

Mg^(2+) ion more highly hydrated than Na^(+) ion.

Assertion : When a neuron is not conducting any impulse, i.e. resting, the axoplasm inside the axon contains high concentration of K^(+) and negatively charged proteins and low concentration of Na^(+) . Reason : In resting, the axonal membrane is comparatively more permeable to K^(+) ions and nearly impermeable to Na^(+) ions. Similarly, the membrane is impermeable to negatively charged proteins present in axoplasm

In a resting nerve fibre the concentration of K^(+) ions is