Solved: a. Many biochemical reactions that occur in cells

Chapter , Problem 72

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a. Many biochemical reactions that occur in cells require relatively high concentrations of potassium ion (K_). The concentration of K_ in muscle cells is about 0.15 M. The concentration of K_ in blood plasma is about 0.0050 M. The high internal concentration in cells is maintained by pumping K_ from the plasma. How much work must be done to transport 1.0 mol of K_ from the blood to the inside of a muscle cell at (normal body temperature)? b. When 1.0 mol of K_ is transferred from blood to the cells, do any other ions have to be transported? Why or why not? c. Cells use the hydrolysis of adenosine triphosphate, abbreviated ATP, as a source of energy. Symbolically, this reaction can be represented as where ADP represents adenosine diphosphate. For this reaction at . How many moles of ATP must be hydrolyzed to provide the energy for the transport of 1.0 mol of K_? Assume standard conditions for the ATP hydrolysis reaction.