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Why is Saltatory conduction is rapid?...

Why is Saltatory conduction is rapid?

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Electrical signals travel faster in axons that are insulated with myelin. Action potentials traveling down the axon “jump” from node to node. This is called saltatory conduction which means “to leap.” Saltatory conduction is a faster way to travel down an axon than traveling in an without myelin.
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Knowledge Check

  • Saltatory conduction occurs in :

    A
    Non-myelinaied fibers
    B
    Myelinated fibers
    C
    Both of them
    D
    None of them

  • Saltatory conduction is uninterrupted conduction because of

    A
    Less energy required
    B
    More speed
    C
    Less `Na^(+)//K^(+)` pump
    D
    All of the above

  • Which of the following statement's are true ? (a) Saltatory conduction is seen in nonmyelinated nerve fibres (b) Nissl granules synthesize protein to repair damaged part of neuron (c) Neurofibrils helps in internal conduction (d) Trigger zone trigger nerve impulse at base of dendron

    A
    (a), (b)
    B
    (a) (c)
    C
    (b), (c)
    D
    (c), (d)

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    A : Presence of myein sheath increases the rate of conduction of nerve impulse. R : Ionic channels are absent in the area covered by myelin sheath therefore, depolarization occurs only at the nodes of Ranvier , resulting in saltatory or jumping conduction.

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