在用脊蛙(去除脑保留脊髓的蛙)进行反射弧分析的实验中,破坏缩

在用脊蛙(去除脑保留脊髓的蛙)进行反射弧分析的实验中,破坏缩腿反射弧在左后肢的部分结构,观察双侧后肢对刺激的收缩反应,结果如下表:

上述结果表明,反射弧的被破坏部分可能是   

A.感受器                           B.感受器和传人神经

C.传人神经和效应器                 D.效应器

答案

C

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