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Perméabilité à K+ en solutions isotoniques [K]e =[K]i donc EK = 0mV

Perméabilité à K+ en solutions isotoniques [K]e =[K]i donc EK = 0mV. I (pA ). -20. V (mV). 0. +20. +40. +40. +20. IK =  K ( Vm - Einv). 0. -20. VH -100. sortant. nul. iK. Le potentiel d ’inversion est égal au potentiel théorique EK (Nernst) Donc le canal est 100%

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Perméabilité à K+ en solutions isotoniques [K]e =[K]i donc EK = 0mV

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  1. Perméabilité à K+ en solutions isotoniques[K]e =[K]i donc EK = 0mV I (pA) -20 V (mV) 0 +20 +40 +40 +20 IK = K ( Vm - Einv) 0 -20 VH -100 sortant nul iK Le potentiel d ’inversion est égal au potentiel théorique EK (Nernst) Donc le canal est 100% spécifique des ions K+ entrant

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