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选择性必修1:(课件图片)2-4 神经系统的分级调节(2)

  • 2026-10-30 14:01:33
选择性必修1:(课件图片)2-4 神经系统的分级调节(2)

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【作者按】

      我是张口聊生物,教学之余,正在将自己这几年用于教学的课件进行完善,尽可能帮助更多有需要的人,课件制作完成后我将发表在张口聊生物公众号上。但由于精力和知识有限,难免存在错误,敬请原谅,欢迎批评指正,我定会及时更正。

      本系列课件不是课堂教学的现场翻版,在原来的基础上作了适当的修订和补充。制作此课件主要目的是便于学生自主学习,同时为老师教学提供一种路径和方便,不适合直接用于课堂教学,授课者可根据各自的学情和进度进行研究适当删减。有些内容会前后重复,目的是方便学生的理解和梳理。

      课件不得用于商业用途或发表到其他平台,仅限于个人使用。

【学习目标】

1. 通过分析神经系统对躯体运动和内脏活动的分级调节实例,如缩手反射、排尿反射等,理解神经系统对躯体运动和内脏活动进行分级调节的机制,认识中枢神经系统各层次之间的协同关系,形成整体与局部观;理解神经系统各中枢之间结构与功能相适应的关系,形成稳态与平衡观。(生命观念)

2. 结合缩手反射实例和教材资料,分析大脑皮层第一运动区与躯体各部分的关系;比较不同中枢在躯体运动和内脏活动调节中的作用层次;运用分级调节原理解释排尿控制等生理现象。基于资料分析和生活实例,归纳总结神经系统分级调节的特点和规律,培养逻辑思维和批判性思维能力。(科学思维)

3. 通过分析脑卒中案例、排尿反射的分级调节,探究高级中枢对低级中枢的调控机制;能够运用所学知识解释神经系统损伤导致的运动障碍。通过对排尿反射等相关实验或资料的分析,尝试提出问题、作出假设、设计实验方案,培养科学探究能力和创新精神。(科学探究)

4. 基于对神经系统分级调节的学习,能够运用分级调节原理来分析相关疾病的原因。关注神经系统相关疾病,了解神经系统分级调节知识在医学和健康生活中的应用,形成关爱生命、珍惜健康的意识。认识神经系统分级调节在维持人体正常生理功能中的重要作用,形成关注神经系统健康(如脑卒中预防)的意识。(社会责任)

实战训练

1. 排尿反射是一种脊髓反射,当膀胱内储尿量达到一定程度时,膀胱被动扩张,使膀胱壁内牵张感受器受到刺激而兴奋,冲动沿盆神经传入纤维传到排尿反射的低级中枢;同时由低级中枢再将膀胱充胀的信息上传至排尿反射的高级中枢,并产生尿意。下列叙述正确的是(  )

A.大脑皮层的排尿反射高级中枢兴奋产生尿意属于反射

B.传入神经与脊髓低级中枢之间需要神经递质传递兴奋

C.婴儿排尿频繁的主要原因是婴儿低级中枢发育不完善

D.切断脊髓与大脑的联系后,机体不可以发生排尿反射

答案:B

解析:大脑皮层的排尿反射高级中枢兴奋产生尿意未经过完整反射弧,不属于反射,A错误;婴儿排尿频繁的主要原因是婴儿排尿反射高级中枢的大脑皮层发育不完善,C错误;切断脊髓与大脑的联系后,排尿反射的反射弧仍然完整,机体仍可发生排尿反射,仅不受意识控制,D错误。

2. 下列对神经系统分级调节表述正确的是(  )

A.脑和脊髓中的神经中枢分工明确,独立地调控机体的生命活动

B.自主神经系统是不受意识控制的,因此它对机体活动的调节与大脑皮层无关

C.脑干中有许多重要的调节内脏活动的基本中枢,如调节呼吸运动的中枢

D.下丘脑是调节内脏活动的低级中枢,它也使内脏活动和其他生理活动相联系

答案: C

解析:脑和脊髓中的神经中枢并非独立调控机体的生命活动A错误;大脑皮层是神经系统的最高级中枢,可对自主神经系统的活动进行调控,二者并非无关,B错误;调节内脏活动的低级中枢是脊髓,而不是下丘脑,D错误。

3. 研究发现“哭泣”可以给情绪降温,泪腺的活动同时受到交感神经和副交感神经支配,但是副交感神经发挥更为核心的作用。下列相关叙述不正确的是(       )

A.副交感神经末梢及支配的泪腺构成了效应器

B.“憋”住不流泪,是泪腺受大脑皮层分级调节的结果

C.情绪属于人脑特有的高级功能,消极情绪积累会产生抑郁

D.交感神经和副交感神经通常共同调节同一器官,且作用一般相反

答案: C

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  1. CONNECT:[ UseTime:0.000714s ] mysql:host=172.18.0.4;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000909s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000507s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000361s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000536s ]
  6. SELECT * FROM `set` [ RunTime:0.000280s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000558s ]
  8. SELECT * FROM `article` WHERE `id` = 535427 LIMIT 1 [ RunTime:0.000389s ]
  9. UPDATE `article` SET `lasttime` = 1794179440 WHERE `id` = 535427 [ RunTime:0.001419s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000330s ]
  11. SELECT * FROM `article` WHERE `id` < 535427 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000435s ]
  12. SELECT * FROM `article` WHERE `id` > 535427 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000443s ]
  13. SELECT * FROM `article` WHERE `id` < 535427 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000586s ]
  14. SELECT * FROM `article` WHERE `id` < 535427 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000588s ]
  15. SELECT * FROM `article` WHERE `id` < 535427 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000588s ]
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