共10题,每题1分.每题的备选项中,只有1个最符合题意

1、 心室在期前收缩后出现代偿间歇的原因是由于正常窦房结传来的冲动落在了期前兴奋的()

A.有效不应期

B.绝对不应期

C.相对不应期

D.超常期

2、 心室肌细胞一次兴奋过程中，其兴奋性的变化哪项是错误的()

A.有效不应期

B.相对不应期

C.超常期

D.低常期

3、 心肌不会产生强直收缩的原因是()

A.心肌肌浆网不发达，Ca2＋贮存少

B.心肌有自律性，会产生自动节律性收缩

C.心肌呈“全或无”收缩

D.心肌的有效不应期特别长

4、 心室等容收缩期瓣膜的状态是()

A.房室瓣开放，动脉瓣关闭

B.房室瓣关闭，动脉瓣关闭

C.房室瓣关闭，动脉瓣开放

D.房室瓣开放，动脉瓣开放

5、 心动周期中，主动脉瓣开放始于()

A.等容收缩期之初

B.等容收缩期之末

C.等容舒张期之初

D.等容舒张期之末

6、 房室瓣关闭见于()

A.等容收缩期开始

B.等容收缩期末

C.等容舒张期开始

D.等容舒张期末

7、 等容收缩期()

A.房内压＞室内压＜动脉压

B.房内压＜室内压＜动脉压

C.房内压＞室内压＞动脉压

D.房内压＜室内压＞动脉压

8、 心室充盈期()

A.房内压＞室内压＜动脉压

B.房内压＜室内压＜动脉压

C.房内压＞室内压＞动脉压

D.房内压＜室内压＞动脉压

9、 快速射血期()

A.房内压＞室内压＜动脉压

B.房内压＜室内压＜动脉压

C.房内压＞室内压＞动脉压

D.房内压＜室内压＞动脉压

10、 等容舒张期()

A.房内压＞室内压＜动脉压

B.房内压＜室内压＜动脉压

C.房内压＞室内压＞动脉压

D.房内压＜室内压＞动脉压

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