Question

Depolarization of axolemma during nerve conduction takes place because of:

• A. Equal amount of Na+ & K+ move out across axolemma
• B. Na+ move inside and K+ move more out side
• C. More Na+ outside
• D. None

Answer 1

Answer: (B)

Na+ move inside and K+ move more out side

Answer 2

Depolarization of axolemma during nerve conduction takes place because more Na+ ions move inside the axon while K+ ions move more outside. This movement of ions is essential for generating action potentials, which are the electrical signals that transmit nerve impulses along neurons.

So, the correct option is (B): Na+ move inside and K+ move more out side.