9. The Myelin Sheath & Multiple Sclerosis

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9 Terms

1
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What organic molecule is abundant in the myelin sheath?

Lipids

2
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What is the electrical function of the myelin sheath on an axon?

Insulates axon

3
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What effect does the myelin sheath have on action potential propagation?

Rapid propagation

4
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What are internodes?

Myelin-covered areas

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What are nodes of Ranvier?

Gaps in myelination

6
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What type of disorder is multiple sclerosis?

Autoimmune disorder

7
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What structure does multiple sclerosis attack?

Myelin sheath

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What cellular process does multiple sclerosis cause on neurons?

Demyelination

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What effect does multiple sclerosis have on propagation speed?

Slows down propagation