γ-氨基丁酸和某种局部麻醉药在神经兴奋传递过程中的作用机理如下

γ-氨基丁酸和某种局部麻醉药在神经兴奋传递过程中的作用机理如下图所示。此种局麻药单独使用时不能通过细胞膜,如与辣椒素同时注射才会发生如图所示效果。下列分析不正确的是

A.局麻药作用于突触后膜的Na+通道,阻碍Na+内流,抑制突触后膜产生兴奋

B.γ-氨基丁酸与突触后膜的受体结合,促进Cl-内流,抑制突触后膜产生兴奋

C.局麻药和γ-氨基丁酸的作用效果和作用机理一致,都属于抑制性神经递质

D.神经细胞兴奋时,膜外由正电位变为负电位,膜内由负电位变为正电位

答案

C

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