单选题-单选 较易0.85 引用14 组卷388
电表与神经纤维的连接方式如下图1所示,图2是在箭头处施加一定的刺激后,根据电表指针的变化作出的曲线图。下列有关叙述错误的是( )
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921406909054976/2921722484760576/STEM/49db60c5cbd24bf99ebf42e52ffd2985.png?resizew=490)
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921406909054976/2921722484760576/STEM/49db60c5cbd24bf99ebf42e52ffd2985.png?resizew=490)
A.无刺激时,电表测得的是静息电位;且图1中a、b两处膜内K+浓度均比膜外高 |
B.若在ab中点用药物阻断电流通过,在箭头处施加刺激,电表指针发生一次偏转 |
C.若减小图1中ab间的距离,则施加刺激后图2中的d也随之减小,当ab=0时电表指针不发生偏转 |
D.若将a点处电极移向膜外,在箭头处施加刺激,电表指针变化曲线图与图2不同 |
17-18高三上·河南·期末
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电表与神经纤维的连接方式如图1所示,图2是在箭头处施加一定的刺激后,根据电表指针的变化做出的曲线图。下列有关叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/16/2765324872572928/2766294312517632/STEM/2e2b3d9c3acd441b934c70b7fd614d39.png?resizew=402)
![](https://img.xkw.com/dksih/QBM/2021/7/16/2765324872572928/2766294312517632/STEM/2e2b3d9c3acd441b934c70b7fd614d39.png?resizew=402)
A.刺激前,图1中a,b两处膜内K浓度均比膜外高 |
B.若减小ab间距离为0,则刺激后电表指针不偏转 |
C.若将ab中点切断,则刺激后电表指针只发生一次偏转 |
D.若将a处电极移至膜外,则电表指针变化与图2不同 |
电流计与立体神经纤维的连接方式如图1所示,图2是在箭头处施加适宜的刺激后,根据电流计指针的变化得到的曲线图。下列有关叙述错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/0bcadac0-c859-4338-83e3-d717b8628a20.png?resizew=389)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/0bcadac0-c859-4338-83e3-d717b8628a20.png?resizew=389)
A.施加刺激前,图1中a、b两处膜内K+浓度均比膜外高 |
B.若将a、b间距离减小为0,则施加刺激后电流计指针不偏转 |
C.若在ab中点处切断神经纤维,则施加刺激后电流计指针只发生一次偏转 |
D.若将a处电极移至膜外,则施加刺激后电流计指针变化与图2不同 |
电流计与神经纤维的连接方式如图1所示,图2是在箭头处施加一定的刺激后,根据电流计指针的变化做出的曲线图。下列有关叙述错误的是( )
![](https://img.xkw.com/dksih/QBM/2020/4/17/2443445509562368/2443548502958080/STEM/6a74bbb6c74e44f08441571e89ad6b97.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2020/4/17/2443445509562368/2443548502958080/STEM/99b5ce4943af4aaf9f2e9cfe9ab70fc1.png?resizew=188)
![](https://img.xkw.com/dksih/QBM/2020/4/17/2443445509562368/2443548502958080/STEM/6a74bbb6c74e44f08441571e89ad6b97.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2020/4/17/2443445509562368/2443548502958080/STEM/99b5ce4943af4aaf9f2e9cfe9ab70fc1.png?resizew=188)
A.刺激前,图1中a、b两处膜内K+浓度均比膜外高 |
B.若减小ab间距离为0,则刺激后电流计指针不偏转 |
C.若只增大ab间距,受刺激后图2中d值将变大 |
D.若将a点处电极移向膜外,在箭头处施加刺激,电流计指针变化曲线图与图2不同 |
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