Q:

In nerve fi bres with myelin sheaths, which of the following is true about the electrical conduction?

waelhammad
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2022-10-19
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 In nerve fi bres with myelin sheaths, which of the following is true about the electrical conduction? 

  1. It is ‘saltatory’, so propagates at higher speed
  2. It requires more energy to send an impulse
  3. The conduction between adjacent axons is enhanced (‘cross talk’ is increased)
  4. It is slower due to the separation between the ‘nodes of Ranvier’
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waelhammad
2022-10-19
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A: The myelin sheath increases the speed of conduction along an axon as the action potential is regenerated when migrating Na ions reach the next node. It “jumps” (saltates) from one node to the next.  

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