The dependence of pacemaker discharge of Aplysia neurons upon Na+ and Ca++.
D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D004558:Electric Stimulation; D004594:Electrophysiology; D066298:In Vitro Techniques; D009431:Neural Conduction; D009474:Neurons / Q000502:physiology*; D011161:Porifera / Q000502:physiology*; D012964:Sodium / Q000378:metabolism*; D013696:Temperature; D013997:Time Factors
D012964:Sodium; D002118:Calcium