1题目图6为反射弧结构示意图,相关叙述中错误的是A.伸肌肌群内既有感受器也有效应器B.b神经元的活动可受大脑皮层控制C.若在Ⅰ处施加一个有效刺激,a处膜电位的变化为:内负外正→内正外负→内负外正D.在Ⅱ处施加刺激引起屈肌收缩属于反射答案D2疑惑李尉军[湖北省黄冈中学(438000)] D选项中,刺激传出神经引起效应器的活动到底是不是 1 Title Figure 6 is a schematic diagram of the reflective arc, the error is related to the narrative A. extensor muscle both existing sensory and effector Bb neurons activity can be controlled by the cerebral cortex C. If I applied an effective stimulus, a change in membrane potential: internal negative external positive internal positive external Negative external positive external stimuli in Ⅱ induced flexor contraction is a reflection answer D2 doubts Li Weijun [Hubei Huanggang Middle School (438000]] D option In stimulating the efferent activity of efferent nerves in the end is not