At the myotendinous junction (MTJ) the slow-twitch muscle soleus (SOL)of the rat has considerable acetylcholine (ACh) sensitivity, whereas the fast-twitchmuscle extensor digitorum longus (EDL) has practically none.

• 在大鼠慢肌比目鱼肌(SOL)肌纤维的肌-腱接头(MTJ)上有较高的乙酰胆碱(ACh)敏感牲,而快肌伸趾长肌(EDL)的 MTJ却没有。