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初中生物学中考一轮复习课件《第20讲 激素调节》

  • 2026-06-15 22:41:32
初中生物学中考一轮复习课件《第20讲 激素调节》

2026 中考生物一轮|激素调节,一张表记牢腺体 + 激素 + 病症!

中考生物一轮复习第 20 讲来啦!激素调节是必考核心点,内分泌腺判断、三大激素功能、异常病症、神经与激素调节关系,年年考、易混淆,这篇帮你一次性理清,考场稳拿分~

✅考点 1:内分泌腺与外分泌腺(必区分)

内分泌腺:无导管,分泌物是激素,直接进入血液

代表:垂体、甲状腺、肾上腺、胰岛、性腺

外分泌腺:有导管,分泌物是消化液 / 汗液 / 泪液等

代表:唾液腺、汗腺、肝脏、皮脂腺

特殊:胰腺既是内分泌腺(胰岛)又是外分泌腺

✅考点 2:三大核心激素(功能 + 病症,中考必考)

🌱生长激素(垂体分泌)

作用:调节生长发育

异常:

幼年不足→侏儒症(身材矮小,智力正常)

幼年过多→巨人症

成年过多→肢端肥大症

🧬甲状腺激素(甲状腺分泌)

作用:促进代谢、促进发育、提高神经兴奋性

异常:

幼年不足→呆小症(身材矮小,智力低下)

分泌过多→甲亢(易激动、多汗、消瘦)

缺碘→地方性甲状腺肿(大脖子病)

🍬胰岛素(胰岛分泌)

作用:调节糖的吸收、利用和转化(降血糖)

异常:

分泌不足→糖尿病(注射胰岛素治疗,不能口服)

分泌过多→低血糖

🆘肾上腺素(肾上腺分泌)

作用:心跳加快、血压升高、提高兴奋性(应急反应)

✅考点 3:神经调节与激素调节的关系

人体生命活动主要受神经调节,同时受激素调节影响

神经调节:迅速、准确、范围局限(反射弧完成)

激素调节:缓慢、广泛、作用时间长(血液运输)

关系:神经主导,激素为辅,相互协调

📝中考命题趋势

情境创新:结合糖尿病、甲亢、侏儒症、青春期发育出题

高频考点:内分泌腺判断、激素功能与病症对应、胰岛素使用

易错重灾区:呆小症 vs 侏儒症、甲状腺肿缺碘、胰岛素不能口服

💡备考小贴士

口诀速记:

垂体管生长,甲状腺管发育,胰岛降血糖,神经为主激素辅

把 “腺体 — 激素 — 功能 — 病症” 对应背熟,选择题、填空题不丢分!

私信回复关键词“第20讲课件”,可自动获取课件。如果觉得课件对您有帮助,麻烦点赞和转发。谢谢!

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  1. CONNECT:[ UseTime:0.000540s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000708s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000305s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000257s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000491s ]
  6. SELECT * FROM `set` [ RunTime:0.000198s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000535s ]
  8. SELECT * FROM `article` WHERE `id` = 507386 LIMIT 1 [ RunTime:0.000370s ]
  9. UPDATE `article` SET `lasttime` = 1782130704 WHERE `id` = 507386 [ RunTime:0.012214s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.002304s ]
  11. SELECT * FROM `article` WHERE `id` < 507386 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009839s ]
  12. SELECT * FROM `article` WHERE `id` > 507386 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000978s ]
  13. SELECT * FROM `article` WHERE `id` < 507386 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001217s ]
  14. SELECT * FROM `article` WHERE `id` < 507386 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002357s ]
  15. SELECT * FROM `article` WHERE `id` < 507386 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001110s ]
0.102707s