[Role of calcium ions in the generation of abdominal sense organ response in the scallop].
The effect of a Ca2+-free solution, Cd2+ ions and theophylline on compound response recorded from the nerve which originates from the abdominal sensory organ of the scallop (Patinopecten yessoensis) was studied during mechanical stimulation of this organ. It was shown that the elimination of Ca2+ ions from the extracellular medium or addition of 10 mmol/l Cd2+ caused complete reversible block of the response. The addition of 5 mmol/l theophylline to the medium resulted in a significant increase in the amplitude of the response. These data show participation of Ca2+ ions in the process of the mechanical stimulus transformation into electrical signal as well as a possible regulation of this process by intracellular cAMP-dependent reactions.
D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D002104:Cadmium / Q000494:pharmacology; D002118:Calcium / Q000502:physiology*; D000242:Cyclic AMP / Q000502:physiology; D005071:Evoked Potentials / Q000187:drug effects; D066298:In Vitro Techniques; D008465:Mechanoreceptors / Q000187:drug effects / Q000502:physiology*; D008974:Mollusca; D013806:Theophylline / Q000494:pharmacology
D002104:Cadmium; D013806:Theophylline; D000242:Cyclic AMP; D002118:Calcium
Rol'ionov kal'tsiia v generatsii otveta abdominal'nogo sensornogo organa molliuska grebeshka.