第29题: [单项选择]女.26岁。患重症肌无力5年,因感冒后肌无力加重,大量服用溴化吡啶斯的明后出现流口水、大量出汗、肌束颤动、腹痛。此种表现是由于()。 A. Ach毒蕈碱样作用亢进 B. 中枢Ach神经元传递减慢 C. 神经肌肉接头处Ach兴奋传递加速 D. 乙酰胆碱(Ach)神经元的后发放 E. Ach烟碱样作用亢进 参考答案:D 答案解析:后发放可发生在环式联系的反射通路中。此外,在各种神经反馈活动中,如随意运动时中枢发出的冲动到达骨骼肌引起肌肉收缩后,骨骼肌内的肌梭不断发出传入冲动,将肌肉的运动状态和被牵拉的信息传入中枢。
第37题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. He left his notes in class. B. He had to borrow the notes from his classmates. C. He doesn’t have an exam. D. He loaned his notes to a classmate. 参考答案:D 答案解析:[听力原文]
W: Why don’t you use your class notes to study for the exam
M: I let Piper borrow them.
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