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Schwann cell

Definition

noun, plural: Schwann cells

A glial cell that wraps around the nerve fiber in the peripheral nervous system, and forms the myelin sheaths of peripheral axons.


Supplement

Schwann cells form a fatty material called myelin to insulate the axons in the peripheral nervous system. This method decreases membrane capacitance in the axon, thus, allowing saltatory conduction. Non -myelinating Schwann cells are involved in maintenance of axons and are crucial for neuronal survival.


Word origin: Named after Theodor Schwann who was first to describe it.
Synonym: neurilemma cell, neurolemmocyte.
See also: myelin, glial cell, peripheral nervous system.


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Schleiden and Schwann contribution to Biology

What about the schwann cell?

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by MichaelXY
Thu May 15, 2008 5:39 am
 
Forum: General Discussion
Topic: Schleiden and Schwann contribution to Biology
Replies: 2
Views: 7864

Schleiden and Schwann contribution to Biology

... the question in the textbook: "What is the contribution of Schleiden and Schawnn to Biology?" . I know that they proposed the 1st two cell theory but what exactly is the contribution of the theory to the development of Biology. Can someone help?

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by thetai903
Thu May 15, 2008 2:09 am
 
Forum: General Discussion
Topic: Schleiden and Schwann contribution to Biology
Replies: 2
Views: 7864

Re: The Physics of how the Myelin Sheath actually works.

... higher concentrations than in an unmyelinated axon (or the Schwann cell gaps) - when an action potential opens the gates, the ions flow in much more quickly, ...

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by Nebulae
Tue Feb 26, 2008 8:18 am
 
Forum: Human Biology
Topic: The Physics of how the Myelin Sheath actually works.
Replies: 17
Views: 21142

Re: The Physics of how the Myelin Sheath actually works.

... higher concentrations than in an unmyelinated axon (or the Schwann cell gaps) - when an action potential opens the gates, the ions flow in much more quickly, ...

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by Darby
Mon Feb 25, 2008 8:59 pm
 
Forum: Human Biology
Topic: The Physics of how the Myelin Sheath actually works.
Replies: 17
Views: 21142

Help Please With Some Questions

Cell theory by Schleiden and Schwann: All living organisms consist of cells. All cells are built out of cells. (Omnis cellula e cellula).

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by Dustfinger
Thu May 10, 2007 8:07 am
 
Forum: Cell Biology
Topic: Help Please With Some Questions
Replies: 10
Views: 4653
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