Question

Which of the following statements is wrong regarding conduction of nerve impulse?

Options

• In a resting neuron, the axonal membrane is more permeable to K⁺ ions and nearly impermeable to Na⁺ ions.

• Fluid outside the axon has a high concentration of Na⁺ ions and low concentration of K⁺, in a resting neuron.

• Ionic gradient s are maintained by Na⁺ K⁺ pumps across the resting membrane, which transport 3Na ions outwards for 2K⁺ into the cell.

• A neuron is polarized only when the outer surface of the axonal membrane possess a negative a charge and its inner surface is positively charged.

Answer 1

A neuron is polarized only when the outer surface of the axonal membrane possess a negative a charge and its inner surface is positively charged.