Peeters G, Bruycker R D
J Dairy Res. 1975 Feb;42(1):11-9. doi: 10.1017/s0022029900015065.
Spontaneous rhythmical contractions of the teats of living cows were recorded by a plethysmographical method. These contractions were inhibited by isoproterenol, adrenaline, isoxsuprine and phentolamine, but were activated by phenylephrine. Noradrenaline induced activation which was often followed by inhibition. These results obtained in vivo were in agreement with responses obtained in vitro. Apparently beta sympathomimetic effects are evoked easily under in vivo conditions.
采用体积描记法记录了活体奶牛乳头的自发性节律性收缩。这些收缩被异丙肾上腺素、肾上腺素、异舒普林和酚妥拉明抑制，但被去氧肾上腺素激活。去甲肾上腺素诱导的激活通常随后会出现抑制。这些在体内获得的结果与在体外获得的反应一致。显然，在体内条件下很容易诱发β拟交感效应。
