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激素调节的过程丨课件丨教材丨答案丨视频

  • 2026-09-21 11:33:09
激素调节的过程丨课件丨教材丨答案丨视频
01

 授课课件 

BIOLOGY

奥运会和残奥会的中国选手作为引入,尤为重要!再结合实验,生活实例等丰富情景,使得本节新授课言之有物,又饱含教育意义。新授课制作起来都非常耗神,只看这一节的图片就知道多么费时,单单以封面为例就精心设计了两个,供老师随意切换,基本每讲都是40+页,图文并茂,干货满满,老师们的评价都是言之有物,拿来即用,物超所值❤❤❤一顿自助餐的费用,换来一学期的轻松备课,时间应该留给自己和家人 。  

02

 课文浏览 

BIOLOGY

点击此处查看本节超清电子书
03

 课后习题 

BIOLOGY

问题探讨

马拉松长跑是赛程超过40 km、历时2h以上的极限运动,运动员每小时至少要消耗300 g糖类。血糖可以补充肌肉因运动而消耗的糖类。正常人的血糖含量为3.9 ~ 6.1mmol/L,全身的血量大约为5 L。

计算:如果仅靠血液中的葡萄糖,运动员能跑多长时间?

【答案】0.7~1.I min(I min左右)。

讨论:长跑过程中大量消耗葡萄糖,会导致血糖含量下降吗?为什么?

【答案】可能会略有下降,但不会持续下降,应在正常范围内波动;运动过程中,因消耗血糖为运动提供能量,血糖含量有所下降;同时,机体会随时分解储能物质转化成葡萄糖补充消耗,维持血糖的相对稳定。

旁栏思考题1

为什么说寒冷条件下人体发抖也是抵御寒冷的自然反应呢?

【答案】身体发抖在生理学上称为战栗产热,又称寒战产热。人体在寒冷环境中主要依靠战栗来增加产热量。寒冷刺激会作用于体表的冷觉感受器,经传入神经传至下丘脑体温调节中枢,最终引起延髓某些部位的神经元兴奋,并将兴奋下传到脊随前角运动神经元,引起肌肉战栗产热。战栗是骨骼肌发生不随意的、不受大脑皮层控制的节律性收缩,节律为9~11次/min,屈肌和伸肌同时收缩,基本上不对外做功,但产热量很高。因此,寒冷条件下人体发抖也是抵御寒冷的自然反应。

思考•讨论

1. 在甲状腺激素的分泌中,下丘脑、垂体和甲状腺之间有何关系?

【答案】下丘脑分泌的TRH. 可以促进垂体分泌TSH。垂体分泌的TSH可影响甲状腺的正常生长和分泌甲状腺激素。甲状腺分泌的甲状腺激素增加到一定浓度时,又会抑制下丘脑和垂体的分泌。

2. 在正常情况下,血液中的甲状腺激素的水平总维持在一定范围内,这是如何实现的呢?

【答案】这是通过分级调节和反馈调节实现的。当血液中甲状腺激素水平升高时,会反馈抑制TSH和TRH的分泌,降低甲状腺激素水平;当甲状腺激素水平降低时,TSH的分泌量增加,促进甲状腺分泌甲状腺激素,促甲状腺激素浓度升高依复到正常水平。

旁栏思考题2

你能否以一种激素为例(如胰岛素或甲状腺激素),说明该激素的产生、运输、作用于靶器 官和靶细胞的过程?

【答案】胰岛素的产生、运输、作用等过程如下:当血糖浓度升高到一定程度时,胰岛B细胞合成和分泌胰岛素的速度加快。胰岛素被分泌后、经循环系统,可分布于全身。胰岛素与组织细胞表面的受体特异性结合,促进组织细胞加速摄取、利用和储存葡萄糖。其体表现为∶促进血糖进入细胞进行氧化分解;促进血糖进入肝细胞、肌肉细胞合成糖原;促进血糖进入脂肪组织细胞并转变为三酰甘油。

练习与应用

一、概念检测

1. 以下关于胰岛素、甲状腺激素作用特点的叙述,错误的是 (C

A. 需借助体液运输

B. 发挥作用后立即失活

C. 在代谢时发挥催化作用

D. 作用于特定的细胞、器官

2. 机体内各种激素彼此关联,相互影响,共同参与调节同一生理功能。下列对激素间相互关系的描述,正确的是 (B

A. 胰岛素与胰高血糖素都对血糖的稳定起作用,二者为协同关系

B. 胰岛素可降低血糖,肾上腺素可使血糖升高,二者作用相抗衡

C. 雌激素和雄激素都抑制垂体分泌促性腺激素,二者为协同关系

D. 生长激素可促进生长,甲状腺激素可促进发育,二者作用相抗衡

3. 右上图曲线表示某人从早餐开始到12时血糖浓度的变化情况,请识图并结合自己的生活实际,分析曲线变化的具体原因(说明血糖的来源或去向,以及相关激素的作用)。

【答案】早餐后,随着食物中的淀粉等糖类物质消化吸收进入血液,血糖浓度升高。血糖浓度升高到一定程度时,刺激胰岛B细胞增强对胰岛素的分泌,胰岛素水平上升,促进血糖的利用和转变成糖原等物质,使血糖浓度下降。随着血糖浓度降低,胰岛A细胞的活动增强,胰高血糖素的分泌增加,促进肝糖原分解和其他物质转变成葡萄糖进入血液,使血糖浓度恢复到正常水平。

二、拓展应用

1. 甲状腺癌患者切除甲状腺后,其下丘脑分泌的TRH还有作用吗?其垂体分泌的TSH呢?为什么这样的患者要终生服用甲状腺激素类药物?

【答案】还有作用,因为TRH的靶器官是垂体,而不是甲状腺;因失去了甲状腺激素对垂体分泌TSH的抑制作用,TSH水平会升高;甲状腺激素对机体代谢和生长发育等具有重要的调节作用,故切除甲状腺后需要终生服用甲状腺激素类药物。

2. 假设你是一位工程师,要为胰岛素分泌不足的糖尿病患者设计一个随身携带的“人工胰岛” (已有这类产品),请写出你的设计思想,指出需要解决的主要问题。

【提示】此题为开放性试题,由学生自主解答。

04

 课堂视频 

BIOLOGY

基本 文件 流程 错误 SQL 调试
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  1. CONNECT:[ UseTime:0.000510s ] mysql:host=172.18.0.4;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000712s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000362s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000336s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000509s ]
  6. SELECT * FROM `set` [ RunTime:0.000284s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000592s ]
  8. SELECT * FROM `article` WHERE `id` = 472684 LIMIT 1 [ RunTime:0.000397s ]
  9. UPDATE `article` SET `lasttime` = 1790051339 WHERE `id` = 472684 [ RunTime:0.001233s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000305s ]
  11. SELECT * FROM `article` WHERE `id` < 472684 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000395s ]
  12. SELECT * FROM `article` WHERE `id` > 472684 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000352s ]
  13. SELECT * FROM `article` WHERE `id` < 472684 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000509s ]
  14. SELECT * FROM `article` WHERE `id` < 472684 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000684s ]
  15. SELECT * FROM `article` WHERE `id` < 472684 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000750s ]
0.092484s