Conduction of nerve impulse occurs at a faster rate in medullated nerve fibre.
Conduction of nerve impulse occurs at a faster rate in medullated nerve fibre.
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1. Medullated nerve fibres have myelin sheath around the axon. This myelin sheath is secreted by Schwann cells.
2. Myelin sheath prevents the loss of the impulse during conduction.
3. Myelin sheath is not continuous. It is interrupted at regular intervals by nodes of Ranvier.
4. The nerve impulse jumps from one node to the next and travels faster at these nodes. Such transmission of impulse is called salutatory conduction.
5. Therefore, conduction of nerve impulse occurs at a faster rate in medullated nerve fibre.
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