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potentiel de repos


StabiloBoss
Go to solution Solved by Lulu_le_Fou,

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il y a 6 minutes, zinez a dit :

quels sont échange d'ions qui ont provoque le potentiel de repos

si potentiel gradué arrivant à zone gachette neurone (au moins - 55mV), on a alors un PA (= potentiel d'action) :

- ouverture des canaux sodiques = dépolarisation

- fermeture canaux sodiques et ouvertures canaux potassiques = repolarisation, et même hyperpolarisation

- tous se ferme et revient à la normale

Potentiel d'Action en 5 étapes - Les Bases -

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