下图是一个反射弧、突触和神经纤维的结构示意图，据图示信息回答下列问题：
神经冲动在突触的传递受很多药物的影响。某药物能阻断突触传递，如果它对神经递质的合成、释放和降解（或再摄取）等都没有影响，那么导致神经冲动不能传递的原因可能是（）。
参考答案：该药物影响了神经递质与突触后膜特异性受体的结合
解析：神经递质的合成和释放等都没有影响，但不能传递信息，可能是因为药物影响了神经递质与突触后膜特异性受体的结合考点：本题综合考查反射弧相关知识，意在考查考生识记所列知识点，并能运用所学知识做出合理的判断或得出正确的结论的能力。
阅读下面的短文，根据短文内容填写表格，将信息补充完整。每空限填1个单词。 Katie Spotz is a 22-year-old girl from America. She wants to cross the Atlantic Ocean by boat. If she succeeds, she’ll be the youngest and the first American to finish the 2500-mile trip. Spotz began sailing when she was at university, but she has never tried to sail such a long way before. It will be a great challenge for her. In recent years, she has swum all the way down the 325-mile Allegheny River and traveled by bike form Seattle to Washington. Spotz knows that she may see some dangerous things during the trip. It will be very dangerous if she meets very bad weather in the middle of the sea. But she believes that she can deal with all the difficulties. “I never thought I could run 26 miles,” she said. “But once I finished it, I realized that maybe I could do something even more difficult.” Spotz wants to collect money by going on this trip. She wants to collect money for an organization called “Blue Planet Run”. The organization offers free, safe drinking water to people who need it. It will take her about three months to finish this trip. Good luck to this brave girl and best wishes to her!
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