A.胰岛 A 细胞转化为胰岛 B 细胞是基因选择性表达的结果 |
B.胰岛 A 细胞合成胰高血糖素的能力随转化的进行而逐渐增强 |
C.胰岛 B 细胞也具有转化为胰岛 A 细胞的潜能 |
D.胰岛 B 细胞分泌的胰岛素经靶细胞接受并起作用后就被灭活 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2