问题 选择题

(200我•长沙)下列反射活动中,人类所特有的是(  )

A.听了洪战辉的事迹报告,同学们感动得哭了

B.手碰到火迅速缩回

C.听到饲养员的喊声,猪跑过来取食

D.吃食物分泌唾液

答案

反射是动物通过神经系统,对外界或内部的刺激作出的有规律的反应.八吃炸鸡腿流口水,看到炸鸡腿流口水,听说炸鸡腿流口水.狗吃炸鸡腿也会流口水,狗看到炸鸡腿也会流口水,表明人和动物都能对具体刺激建立反射(简单反射和具体刺激复杂反射),人与动物最大的区别在于人类有特有的语言中枢,那么人类通过语言中枢建立条件反射,动物是不可能建立的八听说炸鸡腿流口水,狗不会听说炸鸡腿流口水.人类特有的反射,是通过大脑皮层的人类特有的语言中枢对抽象的文字、符号、特征建立人类特有的条件反射;手碰到火迅速缩回是生来就有的简单反射,人与动物都有;听到饲养员的喊声,猪跑过来取食、吃食物分泌唾液,是由具体刺激引起的条件反射,人与动物共有;听了洪战辉的事迹报告,同学们感动得哭了,是在大脑皮层的语言中枢的参与8,形成的人类特有的反射活动.

故选人.

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