Calculate the maximum [glucose]in/[glucose]out ratio that can be achieved by the plasma membrane Na+- Glucose antiporter of an epithelial cell when the concentration of Na+ inside the cell is 7mM, the concentration of Na+ outside the cell is 105 mM, the membrane potential is -60mV (inside is more negative) and temperature is 298 K. assume that the Na+ ions are moving from outside to inside of the cell.