title: [Some peculiarities of the environment surrounding mechano- and electroreceptors of the acoustico-lateral system in the ray Raja clavata].
abstract: Studies have been made on the degree of binding of potassium ions, the content of free calcium ions and glycosaminoglycans in the fluid surrounding mechano- and electroreceptors of the acoustico-lateral system of the ray Raja clavata as well as on the electrical phenomena in potassium hyaluronate solutions and solutions of the fluids investigated. Comparative electrometric and chemical analyses indicate that bound potassium ions amount to 36.4% in the endolymph jelly, 39.6% in the Lorenzini jelly and 21.9% in the canal fluid. Calcium level in the fluids studied amounts to 3.6-4.1 mequiv./l which is similar to that in the sea water (3.4 mequiv./l). Glycosaminoglycan content is equal to 0.30 +/- 0.02% in the endolymph jelly, 0.21 +/- 0.03% in the canal fluid and 2.79 +/- 0.28% in the ampullary jelly (per wet solution). Some characteristics of the "displacement potentials" in potassium hyaluronate solutions and Lorenzini jelly solutions were obtained. Possible role of these potentials in the activity of ampullary structures of the lateral line organ is discussed.
mesh_terms: D000818:Animals; D002118:Calcium / Q000032:analysis; D006309:Hearing; D006820:Hyaluronic Acid / Q000032:analysis; D011188:Potassium / Q000032:analysis; D011955:Receptors, Drug; D011984:Sensory Receptor Cells / Q000032:analysis*
chemical_list: D011955:Receptors, Drug; D006820:Hyaluronic Acid; D011188:Potassium; D002118:Calcium
vernacular_title: Nekotorye osobennosti sredy, okruzhaiushchei akustiko-lateral'noi sistemy skatov Raja clavata