問題詳情
4. Which of the following is a local regulator responsible for activating an enzyme that relaxes smooth muscle cells?
(A) nitric oxide
(B) prostaglandin F
(C) epinephrine
(D) A and B
(E) A, B, and C
參考答案
答案：A
難度：困難0.333333
統計：A(7),B(1),C(0),D(8),E(1)