Question

Saltatory conduction refers to:

1. a fast type of nerve impulse conduction where action potentials are generated

at nodes of Ranvier.

                           b.          a type of nerve impulse conduction where action potentials are generated along

                                         the whole axon continuously.

                       c.           the different stages of an action potential

                       d.           the release of neurotransmitters from synaptic vesicles

Answer 1

• Saltatory conduction refers to - a fast type of nerve impulse conduction where action potentials are generated at nodes of Ranvier.
• Saltatory conduction seen in myelinated nerve fibers.
• Node of Ranvier is the area where axons of the neurons are devoid of the myelin sheath.
• In saltatory conduction ,the impulse jumps from the one node of Ranvier into another node of Ranvier instead of traveling through the entire nerve fiber.
• The depolarisation occurs in the node of Ranvier and not in the internode.So,the action potential jumps from one node to another.