Fedin A N, Nozdrachev A D
Fiziol Zh Im I M Sechenova. 1996 Aug-Sep;82(8-9):80-6.
Serotonin was shown to induce a dose-dependent enhancement of the tonus of the rat and guinea pig trachea smooth muscle: low concentrations facilitated the contractile activity, whereas high doses relaxed the muscle via transmural stimulation of nervous fibres. The serotonin receptors were found to be located at the postganglionic cholinergic fibres and metasympathetic neurons of the trachea intramural ganglia. Presence of the receptors at the trachea smooth muscle cells seems to be highly improbable.
低浓度促进收缩活动，而高剂量则通过跨壁刺激神经纤维使肌肉松弛。发现血清素受体位于气管壁内神经节的节后胆碱能纤维和交感性神经元上。气管平滑肌细胞上似乎极不可能存在这些受体。
