Channel in the [[cell membrane]] through which [[calcium]], [[sodium]] and [[potassium]][[ions]] can enter or leave the [[cell]]. Ion channels are important for [[action potential]].
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Channel in the [[Zellmembran/en|cell membrane]] through which [[Calcium/en|calcium]], [[Natrium/en|sodium]] and [[Kalium/en|potassium]][[Ionen/en|ions]] can enter or leave the [[Zelle/en|cell]]. Ion channels are important for [[Aktionspotential/en|action potential]].