初一生物

2025-03-31 21:23:07
推荐回答(6个)
回答1:

1.选C 如果我没记错的话书上关于神经这节的内容上有提到过。呵呵~我现在已经大学了,不知道你们的现在什么样了,不过应该不会变多少
人体调节包括体液调节,神经调节等等(有点不记得具体哪几个了呵呵),但是这里一切的调节都是无法脱离神经调节的
2.选A
条件反射是指:两样本来没有任何联系的东西,因为长期一起出现,以后,当其中一样东西出现的时候,便无可避免地联想到另外一样东西,是有机体因信号的刺激而发生的反应。例如铃声本来不会使狗分泌唾液,但是如果在每次喂食物之前打铃,经过若干次之后,狗听到零散就会分泌唾液,这种因铃声这个信号的刺激而发生的反应叫做条件反射,铃声叫做条件刺激。

同理小狗表演都是条件反射,但是条件反射是要有一个条件刺激的,如果长期没有这个条件刺激那么小狗的条件放射就消失了,所以要不停的用条件来刺激这种条件放射!
因此A.条件刺激强化条件反射正确!

回答2:

1.人体的生命活动主要受到神经系统的调节,但也受到激素调节的影响。 C
2人的高级神经冲动是条件反射;低级神经冲动是非条件反射;条件反射的神经中枢在大脑皮层,非条件反射的神经中枢在大脑皮层以下中枢(脊髓等),也就是作用的中区不同。下面给出一个详细的列表,你自己看一下哦
条件反射和非条件反射的比较(见表4-4)

项目 非条件反射
条件反射

实例
吃酸杏分泌唾液
看到酸杏分泌唾液

形成时间
先天的
后天的

刺激
事物本身,如杏的酸性物质
事物属性,如杏的形状、颜色

数量
少而有限
多而无限

反射弧
固定不变
不固定、可变

神经中枢
在大脑皮层以下中枢
高级中枢在大脑皮层

神经联系
永久、固定
暂时、不固定

项目
非条件反射
条件反射

意义
适应不变的环境
适应多变的环境

二者的联系
非条件反射是形成条件反射的基础
A

回答3:

1.C
2.c

回答4:

1 c
2 c

回答5:

1.B2.A

回答6:

1 c 2 5

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