3.6.2.1 MYELINATED MOTOR NEURONES

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Last updated 12:46 PM on 4/8/26
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4 Terms

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LABEL AND EXPLAIN A MYELINATED MOTOR NEURONE:

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NERVE IMPULSE:

  • A self-propagating wave of electrical disturbance that travels along the surface of the axon membrane.

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WHY ARE NON-MYELINATED NEURONES SLOWER?

  • AP has to travel along the whole length of the axon.

  • In myelinated, the AP can jump from node to node, called saltatory conduction.

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WHAT ARE THE ACTORS AFFECTING SPEED OF CONDUCTANCE?

  1. Myelination and saltatory conduction.

  2. Axon diameter - large diameter = small SA:V ::: faster AP because:

    1. Large axons have less resistance to flow.

    2. Maintain a more stable PD due to less leakage of ions.

  3. Temperature.