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Biochem/chem help, potassium concentration...?
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 K+ from the blood to the inside of a muscle cell at 37°C, normal body temperature?
When 1.0 mol K+ is transferred from blood to the cells, why do other ions have to be transported?
1 Answer
- Anonymous9 years agoFavorite Answer
Wmin = dG = (umuscle - ublood)dn
= [(u0 + RTln(0.15 M)) - (u0 + RT(0.005 M))](1 mol) = (8.3145J/mok/K)(310.15 K)ln(0.015M/0.0.005M)(1mol) = 8770 J = 8.77 kJ