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2. + 0/1 points Previous Answers SerCP11 16.1.OP.003. My Notes + Ask Your Teacher Animal cells have a membrane that separates the interior of the cell from the outside environment. Typically, an electric potential difference exists between the inner and outer surfaces of the membrane. Consider one such cell where the magnitude of the potential difference is 60 mV, and the outer surface of the membrane is at a higher potential than the inner surface. A potassium ion (K+) is initially just inside the cell membrane (initially at rest). How much work (in J) is required for a cell to eject the ion, so that it moves from the interior of the cell to the exterior? Note that a positive charge is moving from a lower to a higher potential. What does this mean about change in potential energy of the system? For this to occur, does energy exit the system, or does energy need to be supplied? How is electric potential energy related to electric potential? Be careful with units. J Need Help? Read It Submit Answer Practice Another Version