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Use the Nernst equation to calculate the membrane potential (in mV) for Ca(2+) if the concentration...

Use the Nernst equation to calculate the membrane potential (in mV) for Ca(2+) if the concentration of Ca(2+) inside the cell is 5mM and outside the concentration of Ca(2+) is 140mM. You should do this calculation at body temperature, 37C (310K).

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Answer #1

The Nernst equation is :

Where EX is the membrane potential in Volt if X is the only participating ion with valence z = 2 for Ca

R= gas constant= 1.987 cal/mol-degree, T= 310 K (given), F= Faraday constant = 23062 cal/V.mol

By registering the above value equation stands:

or, ==0.04448487 Volts(+)44 mV approx

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