Radioenzymatic assay measurement of yohimbine's influence on adrenergic neurotransmission of rat vas deferens: unique consequence of using normetanephrine as an uptake2-blocking agent

Cholinergic transmission in vas deferens

Prazosin, haloperidol, propranolol or timolol had no effect on the electrically evoked muscular twitch. Atropine was able to antagonize competitively acetylcholine (pA2 = 9.29 +/- 0.30). The muscular twitch of the Octodon degus vas deferens was only partially abolished by atropine (53.2 +/- 0.72). The present results can be interpreted assuming that the Octodon degus vas deferens has one component muscarinic in its innervation.