Probably there are two different kinds of action sites on the pre-and post-s ynaptic membranes of adrenergic nerve separately. 可能与肾上腺素能神经突触前膜和突触后膜分别存在的两类不同性质的作用点有关。
Some nitrergic nerve ganglions were observed in the muscle layer or in the submucosa along the side of the circular muscle layer. 在肌层和粘膜下层靠近环行肌一侧可见到氮能神经节。