单项选择题

重症肌无力患者由于体内存在某种抗体，该抗体与神经一肌肉突触的受体特异性结合，使该受体失去功能，最终导致______。

A．刺激神经不能引起肌肉收缩
B．出现全身性过敏反应
C．肌肉对神经递质的反应性提高
D．机体对病原体的反应能力提高

<上一题目录下一题>

热门试题

单项选择题

A:Could I use your dictionary, please B:() A:Thank you. I’ll return it as soon as possible.

A．Sure. What is it
B．It’s very nice of you to say so.
C．It’s nothing.
D．Have a nice trip!
E．Certainly, Here you are.

单项选择题

A: () I really must ask you something first. B:Very well. If you insist,go ahead please! A:Would you like a cup of coffee B:Pardon What did you say A:You see,l’m English. I’m one of the teachers here.I came to ask you if you would like a cup of coffee.

A．You must have wronged me.
B．Oh! I’m so sorry about this.
C．Please stop just a second.
D．Are you Mr. Smith
E．But may I ask you something first
F．Is there anything I can do for you
G．Now, sit down please.