On Mon, 11 Oct 1999, George D. Goedel went:
> I have always assumed, as has Steven, that there were passive channels (for
> sodium and potassium) which permitted flow of Na & K ions in accordance
> with their diffusion gradients.
I had always assumed that all the channels were gated, either
electrically or chemically, but that a few sodium ions could always
somwehow sneak in anyway. I was wrong.
> Carlson, in his Physiology of Behavior text (6th ed) notes that "By
> the way, cell biologists have discovered approximately 75 different
> types of ion channels, and more will undoubtedly be discovered."
Yeah, I remembered that; I just figured they were 75 different _gated_
types of ion channels. I was wrong.
duly chastened,
David Epstein
[EMAIL PROTECTED]
