能斯特方程式(Nernst equation)


E0標準電位
R氣體常數8.314JK-1mol-1
T凱氏溫標
N電極半反應式中的電子數
F法拉第常數96485庫倫(C)
ln自然對數(natural logarithm)=2.303log
將常數數值代入限定在攝氏25度下測量
 當細胞膜只容許一種離子通透時,除了可用電極測定其平衡電位外,還可利用能斯特方程式(Nerst Euaqtion)
 細胞膜內外離子濃度差越大時,膜電位會越接近該離子的平衡電位,即對膜電位的影響越明顯,不過前提是此離子具通透性

▼神經傳導(Nerve conduction) 顯示/隱藏(show/hide)

3 意見:

  1. 不知所云,ABCD也沒交代

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  2. 上面那位ABCD是要交代什麼啦很有事欸

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  3. Why does it make sense that the valence, z, is in the denominator of the Nernst equation? Specifically, explain intuitively why it makes sense that the equilibrium potential for an ion with valence +2 would be half the magnitude of the equilibrium potential for an ion with valence +1. (For example, K+ has an equilibrium potential of - 84 mV, but an ion X++, with the same intracellular and extracellular concentrations as K+, would have an equilibrium potential of just -42 mV).

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