Electric field:

$\overline{){\mathbf{E}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{\u2206}\mathbf{V}}{\mathbf{\u2206}\mathbf{x}}}$

At the peak of depolarizatin, ΔV = 40mV(10^{-3}V/1mV) = 40 × 10^{-3} V

A 8.0 nm thick cell membrane undergoes an action potential that follows the curve in the figure.

What is the strength of the electric field inside the membrane at the peak of the depolarization?

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