The membrane that surrounds a certain type of living cell has a surface area of

Question

The membrane that surrounds a certain type of living cell has a surface area of 4.95 times 10^-9 m^2 and a thickness of 9.90 times 10^-9 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.50. The potential on the outer surface of the membrane is +61.2 mV greater than that on the inside surface. How much charge resides on the outer surface? C If the charge in part (a) is due to K- ions (charge +e), how many such ions are present on the outer surface? Ions

Explanation / Answer

c=19.912 pico-farad

q=1.2186 pico col

The number of ions is: 0.7616*10-7

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