On 8-2-2010 20:02, Darren New wrote:
> andrel wrote:
>> They don't. Along the length of the axon ion channels are opening 
>> causing ions to flow across the membrane. That in itself will trigger 
>> the opening of channels close by and that will run as a bushfire over 
>> the membrane.
> 
> Right. We're just arguing over what constitutes "electricity" now. Since 
> it was originally about supplying power to make illumination, I was 
> assuming the "electrons flowing thru a conductor" definition.

For me electricity is a flow of charge. That includes holes in a 
semiconductor. It may be that electrons are a required part of some 
definition but not in physics or engineering.

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