Abstract:The present study was undertaken to investigate further the effects of the potassium channel opening drug cromakalim on the release of transmitter acetylcholine from cholinergic nerves of rat isolated trachea by using two tracheal preparations superfused in series. In all experiments, the lower chamber contained an epithelium-denuded preparation which had been incubated with [3H]-choline to incorporate [3H]-acetylcholine into cholinergic transmitter stores, whereas the upper chamber contained an unlabelled, ep… Show more
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