Sodium channels need not open before they inactivate.
D000818:Animals; D007473:Ion Channels / Q000502:physiology*; D007700:Kinetics; D008564:Membrane Potentials; D008954:Models, Biological; D009132:Muscles / Q000502:physiology; D012964:Sodium / Q000378:metabolism*
D007473:Ion Channels; D012964:Sodium