A.当K+浓度为4mmol·L-1时,K+外流增加,细胞难以兴奋 |
B.当K+浓度为150mmol·L-1时,K+外流增加,细胞容易兴奋 |
C.K+浓度增加到一定值(<150mmol·L-1),K+外流增加,导致细胞兴奋 |
D.K+浓度增加到一定值(<150mmol·L-1),K+外流减少,导致细胞兴奋 |
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