Question

短跑運(yùn)動(dòng)員一聽到槍聲就跑，這一反射的神經(jīng)沖動(dòng)傳遞的途徑是

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A．耳→傳入神經(jīng)→脊髓→傳出神經(jīng)→肌肉
B．耳→傳入神經(jīng)→大腦→傳出神經(jīng)→肌肉
C．皮膚→傳入神經(jīng)→脊髓→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

B