Calcium and excitable cells.
D000255:Adenosine Triphosphate / Q000378:metabolism; D002118:Calcium / Q000378:metabolism / Q000494:pharmacology*; D002462:Cell Membrane / Q000378:metabolism*; D006801:Humans; D008564:Membrane Potentials / Q000502:physiology; D009119:Muscle Contraction; D009457:Neuroglia / Q000378:metabolism
D000255:Adenosine Triphosphate; D002118:Calcium