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问题 单项选择题

骨骼肌兴奋-收缩耦联，肌细胞兴奋时释放到肌浆中的Ca2+通过什么机制回收到肌质终末池（）

A．锋电位 

B．阈电位 

C．负后电位 

D．局部电位 

E．正后电位

答案

参考答案：E

单项选择题

A first-time mother-to-be is in the labor room, her husband at her bedside. The client states that her contractions began 6 hours ago. Which of the following assessment findings would confirm that the client is in true labor

A. Discomfort located chiefly in the abdomen.
B. Constant intensity of contractions.
C. Contractions occurring every 10 to 15 minutes and lasting 20 to 30 seconds.
D. Cervix that is 100% effaced and 2 cm dilate
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单项选择题 A1/A2型题

属一级动力学药物的消除半衰期的是（）。

A.是一恒值，不受疾病的影响

B.消除半衰期与清除率成正比

C.消除半衰期与表观分布容积成正比

D.某一病人某药的消除半衰期与表观分布容积成反比

E.消除半衰期与血药浓度成正比
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