Re: Non-Specialized cell

[John Jacobus <crispy_bird@YAHOO.COM>]

I stand corrected on the differentiation between 

Schwann (correct spelling) and oligodendrocytes cells.

 Thank you for the calification.



--- Susan McElrath <smhp@BELLSOUTH.NET> wrote:



> Actually Schwann cells are located outside the brain

> and spinal cord.

> Oligodendrocytes are the myelin-producers in the

> brain and spinal cord,

> the central nervous system.  

> 

> I think it is safe to say the brain cells are very

> specialized, or

> "differentiated" compared to, say, the epithelial

> cells that line the GI

> tract.  They do not divide rapidly, which is

> probably why they are more

> radiation-resistant than cells that divide

> frequently.

> 

> Susan McElrath

> smhp@bellsouth.net

> (770) 222-0829 home

> (770) 222-4958 office

> (770) 633-8591 mobile

> (678) 623-3310 fax

> ======================================

> Date: Wed, 11 Aug 2004 07:04:12 -0700 (PDT)

> From: John Jacobus <crispy_bird@YAHOO.COM>

> Subject: Re: Non-Specialized cell

> 

> First of all, the brain is not "a non-specialized

> cell."  It is an organ of highly differentiated

> cells

> that work in consort to perform many individual

> functions.  See

> http://www.albany.net/~tjc/20-03.html

> and http://www.albany.net/~tjc/20-03.html

> 

> Besides neurons and swann cells, 90% of the brain is

> made of glial cells. 

>

http://www.enchantedlearning.com/subjects/anatomy/brain/Neuron.shtml

> 

> I think the question should be "Is the brain CELL

> considered to be a non-specialized cell?"  That is

> the

> way the question is usually stated, and the answer

> is

> "no."

> 

> - --- "Moore,Paul" <MoorePE@PGDP.USEC.COM> wrote:

> 

> > I am looking for the answer to this question "Is

> the

> > brain considered to be

> > a non-specialized cell?"

> > I have read the section in Gollnick and cannot

> > interpret what is being

> > stated.

> > I am receiving different answer from people where

> I

> > work, so I thought I

> > would ask Radsafe for the answer.

> > Thanks very much for your time.

> > 

> > Paul Moore

> > HP Technical Trainer

> > Phone 270-442-5956 / MS 2121

> > FAX 270-441-6139

> > <mailto:moorepe@pgdp.usec.com>

> 

> 





=====

+++++++++++++++++++

"Everyone is ignorant, only on different subjects."

Will Rogers



-- John

John Jacobus, MS

Certified Health Physicist

e-mail:  crispy_bird@yahoo.com





		

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