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

Options

A. equally permeable to both `Na^(+)` and `K^(+)` ions
B. impermeable to both `Na^(+)` and `K^(+)` ions
C. comparatively more permeable to `K^(+)` ions and nearly impermeable to `Na^(+)` ions
D. comparatively more permeable to `Na^(+)` ions and nearly impermeable to `K^(+)` ions

Answer

C

Explanation

Neurons are excitable cells because their membranes are in a polarised state. Different types of selectively permeable channels are present on the neural membrane. When a neuron is not conducting any impulses, i.e. resting, the axonal membrane is comparatively more permeable to potassium ion `(K^(+))` and nearly impermeable to sodium ion `(Na^(+))`.