Kevin Quinn (k-quinn at nwu.edu) wrote:
: I'm interested in developing an in-class demonstration of the resting
: membrane potential of a cell and was wondering if anyone has ever
: developed such a demonstration. This is for a class in physiological
: psychology that I will be teaching (lecture only - no lab). Ideally it
: would be accomplished with very simple materials - to make the point about
: a semipermeable membrane and the right ion distribution really resulting
: in a voltage gradient! If anyone has suggestions for what may have worked
: for them in the past I'd be most grateful.
I haven't tried it myself (or even seen it done), but I have thought that
using different colored and sized plastic balls (=ions) and a mesh or net
that will allow some through but not others (maybe fishing net??) might be
a useful aid. Then again, it could be a disaster... but who knows 'til you
try.
my $.02, good luck
Brent