IUBio

ION - Channels Definition&Task

Bjoern Brembs bjoern at brembs.net
Mon May 17 01:05:21 EST 1999


Christian Guttmann wrote:

> * Should I understand Ion channels as channels, which are in the membran
> of a cell
> and responsible for transportation of ions, like Na+, K+, Ca2+, Mg2+,
> Cl- and HCO-3,
> whereby the sodium and podassium channels are the most important? They
> are responsible
> for the concentration of the ions of both sides of the membran.

I would think so. Any textbook on neurobiology (even just biology) should
contain this basic information-

> * The main significance for nerve cells of
>     K+ channels is the fast depolarization of the Actionpotential, for
> Na+ channels - the fast
>     repolarization and the regulation of the firerate and for Ca+ -
> medium depolarization and a
>     long-term Actionpotentials.

It should be all within one chapter of any biology textbook.

Bjoern








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