Myelin Sheath

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7 Terms

1
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where is myelin sheath formed in the CNS?

oligodendrocytes

2
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where is myelin sheath formed in the PNS?

schwann cells

3
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what is myelin sheath?

specialized layers that wrap around the axons of some neurons

4
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what does the myelin sheath prevent as an insulator?

prevent almost all ion movement across the cell membrane

5
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what disease of the myeline sheath causes the loss of muscle function?

multiple scelrosis

6
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what are the gaps that are every millimeter in the myeline sheath called?

nodes of ranvier

7
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what can occur at the nodes of ranvier?

ion movement