问题
单项选择题 A3/A4型题
患者，男性，65岁，双上肢震颤、活动不灵活1年余，行头颅MRI未见明显异常。查体：表情呆板，四肢肌张力增高，呈齿轮样，指鼻试验阴性。该病的发病机制最可能是（）
A.纹状体内多巴胺含量减少
B.纹状体内多巴胺受体功能增强
C.纹状体内乙酰胆碱含量增加
D.纹状体内乙酰胆碱受体功能减退
E.纹状体内多巴胺含量减少
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
患者，男性，65岁，双上肢震颤、活动不灵活1年余，行头颅MRI未见明显异常。查体：表情呆板，四肢肌张力增高，呈齿轮样，指鼻试验阴性。该病的发病机制最可能是（）
A.纹状体内多巴胺含量减少
B.纹状体内多巴胺受体功能增强
C.纹状体内乙酰胆碱含量增加
D.纹状体内乙酰胆碱受体功能减退
E.纹状体内多巴胺含量减少
参考答案：E
| 完形填空。 | ||||
| There are times when people are so tired that they fall asleep almost anywhere. We can see there is a lot of sleeping on the bus or train on the 1 home from work in the evenings. A man will be 2 the newspaper, and seconds later it 3 as if he is trying to 4 it. Or he will fall asleep on the shoulder of the stranger 5 next to him. 6 place where unplanned short sleep 7 is in the lecture hall where a student will start snoring (打鼾) so 8 that the professor has to ask another student to 9 the sleeper awake. A more embarrassing (尴尬) situation occurs when a student starts falling into sleep and the 10 of the head pushes the arm off the 11 , and the movement carries the 12 of the body along. The student wakes up on the floor with no 13 of getting there. The worst time to fall asleep is when 14 . Police reports are full of 15 that occur when people fall into sleep and go 16 the road. If the drivers are 17 , they are not seriously hurt. One woman's car, 18 , went into the river. She woke up in four feet of 19 and thought it was raining. When people are really 20 , nothing will stop them from falling asleep-no matter where they are. | ||||
|