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5) Suppose the plasma membrane of a cell has a surface charge per unit area of approximately 10 C/m on one side and an

5) Suppose the plasma membrane of a cell has a surface charge per unit area of approximately 10 C/m on one side and an equal but opposite charge on the other side. Estimate the electric field strength inside the plasma membrane. a) b) Estimate the force on an ion of Ca+ placed inside the plasma membrane of a cell.

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