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问题 单项选择题

突触前抑制的特点是

A．突触前膜超极化

B．潜伏期长，持续时间长

C．突触前轴突末梢释放抑制性递质

D．突触后膜的兴奋性降低

E．通过轴突—树突突触结构的活动来实现

答案

参考答案：B

改错题

Ten years ago, I had worked as a night guard in a factory. On a rainy night, all the lights of factory went out all of a sudden. I rushed out and could see nothing. Lucky for me, the warning system was directly connected with the police station. Three or four minutes late, four police car arrived at the front gate. They searched for the factory carefully, tried to find something unusual. In the end, I am told that the rain had brought about   the short circuit, that caused the accident.
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单项选择题

男，46岁，腹部不适多年，结合图像，最可能的诊断为（）

A.正常空肠

B.空肠结核

C.克罗恩病

D.空肠多发憩室

E.空肠占位
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