The potassium-ion concentration in blood plasma isabout 5.0 x 10-3 M, whereas the concentration in muscle-cell fluid is much greater (0.15 M ). The plasma andintracellular fluid are separated by the cell membrane,which we assume is permeable only to K+. (a) What is ΔGfor the transfer of 1 mol of K+ from blood plasma to thecellular fluid at body temperature 37 °C? (b) What is theminimum amount of work that must be used to transferthis K+?

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