title: Circadian system of the Aplysia eye: properties of the pacemaker and mechanisms of its entrainment.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001048:Aplysia / Q000502:physiology*; D001683:Biological Clocks; D002940:Circadian Rhythm; D005123:Eye / Q000294:innervation; D008564:Membrane Potentials; D009474:Neurons / Q000502:physiology; D009799:Ocular Physiological Phenomena; D009900:Optic Nerve / Q000502:physiology; D010786:Photoreceptor Cells / Q000502:physiology; D012701:Serotonin / Q000502:physiology; D009435:Synaptic Transmission
chemical_list: D012701:Serotonin