Question

Very short answer type:
In a polarised membrane, what is the charge just inside the membrane?

Answer 1

At resting potential or polarized state, the axonal membrane is comparatively more permeable to potassium ions and nearly impermeable to sodium ions. Therefore, a resting neuron is negatively charged on the inside and positively charged on the outside. Such a charge separation is called polarization and thus resting neuron is said to be polarised.