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When a neurone is a resting state, ie, not conducting any impulse, the axonal membrane is 

  • equally permeable to both Na+ and K+ ions

  • impermeable to both Na+ and K+ ions

  • comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

  • comparatively more permeable to Na+ ions and nearly impermeable to K+ ions

Answer

C.

comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

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

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