Membrane watching.
D000818:Animals; D001369:Axons / Q000502:physiology; D002118:Calcium / Q000378:metabolism; D002462:Cell Membrane / Q000502:physiology*; D008564:Membrane Potentials; D008567:Membranes, Artificial; D008974:Mollusca / Q000502:physiology; D011188:Potassium / Q000378:metabolism; D012964:Sodium / Q000378:metabolism
D008567:Membranes, Artificial; D012964:Sodium; D011188:Potassium; D002118:Calcium