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【单选题】
下列关于反射弧的理解,错误的是:A.
反射弧通常由感受器、传入神经、神经中枢、传出神经、效应器五部分组成
B.
感受器接受刺激后，能产生兴奋
C.
感受器由感觉神经元的神经末梢所组成
D.
效应器由运动神经元的神经末梢所组成
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