Myelin: Difference between revisions
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imported>Bram De Clerck (New page: Myelin is the conducting substance that covers long axons in the white matter, it consists of nodes of ranviers, which are supported by glial cells in the white mat...) |
imported>Richard Pettitt (subpages and some edits) |
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Myelin is the | {{subpages}} | ||
'''Myelin''' is the [[lipid]] [[substance]] that covers long [[axon]]s to speed up [[action potential]]s, and is responsible for the appearance of the [[white matter]]. A myelinated axon consists of [[nodes of ranvier]], which are supported by [[glial cell]]s in the white matter and look like small [[tube]]s covering the axon with small gaps in between them. Myelin is created by [[oligodendrocytes]] in the [[central nervous system]], and by [[schwann cells]] in the [[peripheral nervous system]]. | |||
Revision as of 10:50, 27 December 2007
Myelin is the lipid substance that covers long axons to speed up action potentials, and is responsible for the appearance of the white matter. A myelinated axon consists of nodes of ranvier, which are supported by glial cells in the white matter and look like small tubes covering the axon with small gaps in between them. Myelin is created by oligodendrocytes in the central nervous system, and by schwann cells in the peripheral nervous system.