[Effect of CO2 on the excitable membrane of a single node of Ranvier].
Introduction into the chamber containing the preparation of a gaseous mixture with a 5% CO2 content failed to lead to any significant changes in the recorded parameters of the node of Ranvier. Elevation of CO2 concentration to 50% caused a significant increase of resistance, of the critical level of the membrane depolarization, a decrease of the spike amplitude, and of the maximum steepness of its increase. Two minutes after the beginning of the gas mixture introduction spike degeneration stopped. CO2 action was completely reversible. The trace potentials of the node of Ranvier remained unchanged with the CO2 action in the mentioned concentrations.
D000818:Animals; D001001:Anura; D002245:Carbon Dioxide / Q000494:pharmacology*; D004553:Electric Conductivity; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects*; D011901:Ranvier's Nodes / Q000187:drug effects*
D002245:Carbon Dioxide
Vliianie CO2 na vozbudimuiu membranu odinochnogo perekhvata Ranv'e.