Effects of Cs on acetylcholine induced current

Abstract
20 mM Cs+ ions reduce background current and decrease drastically the K+ depletion process, probably as a consequence of the reduction ofi K1. The background current-voltage relationship becomes linear. 20 mM Cs+ ions completely abolish the current induced by acetylcholine. The possibility that the K+ current induced by acetylcholine is due to an increase ofi K1 is discussed.