This stimulatory effect was significantly reversed by the specific antagonist of the opiate receptor-naloxone, indicating that the opiate receptors may be present in the gall bladder muscle.

• 乙酰胆碱显著地加强胆囊肌条的收缩,此效应可被阿托品阻断,而且阿托品也使吗啡对胆囊肌条的作用明显减弱。