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The membrane that surrounds a certain type of living cell has a surface area of 4.70 x 10-9 m2 and a thickness of 9.60 x 10-9 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.40 (a) The potential on the outer surface of the membrane is +62.4 mv greater than that on the inside surface. How much charge resides on the outer surface? 1.11e-12X (b) If the charge in part (a》 is due to K+ ions (charge +e), how many such ions are present on the outer surface? 6.94e6 ions

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