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Home Q & A Board Biology-Related Homework Help Cell Biology
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Leendr Leendr
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10 years ago
Please explain your answer. Thanks.
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#1
10 years ago
Neither.  The reason is that myelin itself is a sheath of insulating fatty compounds that surround a neuron.  Impulses therefore have less of a chance of "degrading" before they reach their destination.  however that does not affect the speed of the impulse, just the likelihood that it will survive intact.

Diseases that degrade the myelin sheath are some of the reasons that people have difficulty moving or speaking- the synapse fires the impulse, but it seldom makes it.
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#2
10 years ago
Myelinated neurons. This is the reason for the nodes of Ranvier - instead of the impulse traveling a long distance down the neuron, it "jumps" over the myelinated part of the neuron. This enables it to travel faster.
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