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The electric potential difference across the cell membrane of ahuman cell is 0.080 V, with the higher potential being outsidethe cell. In one cellular process a sodium ion Na+, with charge+e, is "pumped" through a channel in the membrane to beejected from the cell. (a) How much work must be done by the cellto eject the ion? (b) A candy bar contains 270 Calories, or1.13×106 J of food energy. How many sodium ions couldthe cells of your body eject using the energy obtained in one candybar?

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