Question

舉重運(yùn)動員遵從教練的指導(dǎo)，一見燈亮就用力舉起杠鈴。這一反射的神經(jīng)沖動傳遞的途徑是                                                  

A.眼→傳入神經(jīng)→脊髓→傳出神經(jīng)→肌肉 

B.皮膚→傳入神經(jīng)→脊髓→傳出神經(jīng)→肌肉

C.眼→傳入神經(jīng)→大腦→傳出神經(jīng)→肌肉 

D.皮膚→傳入神經(jīng)→大腦→傳出神經(jīng)→肌肉

 

Answer 1

【答案】

C

【解析】眼是感受器，視網(wǎng)膜上有感光細(xì)胞，能感受光線的刺激，形成神經(jīng)沖動，神經(jīng)沖動沿著傳入神經(jīng)傳導(dǎo)到大腦，再通過傳出神經(jīng)將神經(jīng)沖動傳導(dǎo)到效應(yīng)器—肌肉，肌收縮舉起杠桿。