問題詳情

12. 心臟收縮始於
(A)opening of the semilunar valves
(B)activation of the AV node
(C) opening of the voltage-gated potassium gates
(D) activation of the SAnode
(E)opening of the pulmonary valve

參考答案

答案：D
難度：適中0.444444
統計：A(3),B(13),C(5),D(28),E(4)