Question

Discuss the importance of nodes of Ranvier.

Answer 1

1. Rapid Nerve Conduction: The nodes of Ranvier are evenly spaced gaps in the insulating myelin sheath that facilitate rapid propagation of the nerve impulse along the axon.
2. Site of Membrane Depolarisation: Because the myelin acts as an insulator, ionic exchanges (depolarisation and repolarisation) occur specifically at these uninsulated nodes, allowing impulses to jump efficiently from node to node.