Question

舉重運(yùn)動(dòng)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(dòng)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

C

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(dòng)，神經(jīng)沖動(dòng)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(dòng)傳導(dǎo)到效應(yīng)器—肌肉，肌收縮舉起杠桿。