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6. The Nernst equation can be used to calculate the membrane potential based on the ratio of the outer and inner ion concentration. In a resting cell, membrane is calculated taking only K+ ions into account. What is vwhen c 15 mM and C 106 mM? e. 438.1 mV c. 5.3 mV 2.7 mV d. 52.7 mV 5.3 mV
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Answer #1

We know V= RT/ZF log[K]o /[K]i

[K]o = outside concentration of K+

[K]i = inner concentration of K+

Now,

RT/ZF value is 61.5 mV,

Therefore RT/ZF Log [15]/[106]

Or, 61.5× log 15/106

Or, 61.5 × - 0.85

Or, - 52.5

There V = - 52.5 mV

Negative value mean outside of the cell is positive.

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