Question

Passage of action potential from one node of Ranvier to the next is

• A. Nodal conduction
• B. Saltatory conduction
• C. Threshold stimulus
• D. Mechanical conduction

Answer 1

The correct option is B Saltatory conduction

B. Saltatory conduction

Reason: The properties of impulse conduction described so far apply to unmyelinated neurons. However, the myelin sheath of many axons in the body insulates those axons except at the nodes of Ranvier. When impulse travels along a myelinated neuron, depolarization occurs only at the nodes. It leaps over the myelin sheath from one node to the next. This process, the saltatory conduction. Saltatory conduction accounts for the greater speed of an impulse traveling along a myelinated neuron than along a nonmyelinated one.