Difference between revisions of "DiffEqs"
From Sean_Carver
(→Plain Bilayer Membrane) |
(→Plain Bilayer Membrane) |
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A plain lipid bilayer is approximately an ideal capacitor. The equation for an ideal capacitor is | A plain lipid bilayer is approximately an ideal capacitor. The equation for an ideal capacitor is | ||
| − | <math> C \frac{dV(t)}{dt} = I(t) | + | <math> C \frac{dV(t)}{dt} = I(t) |
V(0) = 0 </math> | V(0) = 0 </math> | ||
Revision as of 21:31, 7 February 2009
Contents
Plain Bilayer Membrane
A plain lipid bilayer is approximately an ideal capacitor. The equation for an ideal capacitor is
Here C is a constant (parameter), the capacitance of the membrane, proportional to area.
Next V(t) is the membrane potential.
Next I(t) is the current into the membrane, with a sign such that a positive current depolarizes the cell. The sign conventions are TRICKY!!! I get confused all the time.
