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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