[Effect of calcium ions on the electrical and temperature sensitivity of the ampullae of Lorenzini of Black Sea skates].
Changes in the ambient calcium concentration affected similarly both thermal and electrical sensitivity of electroreceptors of the Lorenzini ampullae in the skates. In Ca-free solution containing EGTA the sensitivity first decreased, then increased and after that blocking of synaptic transmission occurred. In Ca-rich solution both thermal and electrical sensitivity decreased. Changes of spontaneous activity occurred much later than those of evoked responses.
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D004533:Egtazic Acid / Q000494:pharmacology; D004558:Electric Stimulation; D004560:Electricity; D004594:Electrophysiology; D005399:Fishes / Q000502:physiology*; D011984:Sensory Receptor Cells / Q000187:drug effects*; D013823:Thermoreceptors / Q000187:drug effects
D004533:Egtazic Acid; D002118:Calcium
Vliianie ionov kal'tsiia na élektricheskuiu i tempreaturnuiu chuvstvitel'nost' ampul Lorentsini chernomorskikh skatov.