Nernst Potential for Potassium...   

    E (mv) = +/- 62 Lg₁₀ [ Co ]
                                     [ Ci ]

                    [ Co ] =  1.0 mM  K  and  [ Ci ] = 7.0 mM

    
    E =  + 62  Lg₁₀  1.0/7.0 

       =  + 62  Lg₁₀   0.1428

       =  + 62  -(0.8453)

    E =  - 52.4 mV is the value of the calculated Nernst Potential

          since the measured bioelectric potential inside the cell is 
       + 10 mV then, K does NOT move passively across this
          membrane, and therefore K must move ACTIVELY.
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