Question

In a typical mammalian cell, the net transport by the sodium-potassium exchange pump that maintains the 70 mv membrane potential is 500 singly charged ions per second.

Answer 1

For  a typical mammalian cell, the net transport by the sodium-potassium exchange pump, Work done is mathematically given as

W= 5.6*10-18 J

How much work does the pump do each second?

Generally, the equation for the Potential difference   is mathematically given as

Potential difference = Work done / Charge

Therefore

W=q*P.d

Q= 500 * 1.6*10-19 C

P.d. = 70 mV

In conclusion,Workdone  

W500 * 1.6*10-19 * 70*10-3

W= 5.6*10-18 J

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