2022年人教版七上《植物细胞》word教案 .pdf

名师精编优秀教案第二节植物细胞【教学目标】知识方面：1、认识动物细胞的基本结构。说明细胞与植物细胞基本结构的异同点。2、制作人的口腔上皮细胞临时装片，并使用显微镜观察。3、尝试制作动物细胞模型。4、认同细胞学说是19 世纪自然科学三大发现之一。能力方面：1、学会制作并观察人的口腔上皮细胞临时装片，巩固练习画生物图的技能。2、通过观察能够比较出动、植物细胞结构的异同点，提高观察能力、总结归纳能力、逻辑思维能力和知识的应用能力。情感、态度与价值观方面：学习与人合作的精神，认同细胞是生命活动的基本结构和功能单位。【重点和难点】教学重点：1、制作人的口腔上皮细胞临时装片，并练习使用显微镜观察。2、动物细胞的基本结构。教学难点：制作人的口腔上皮细胞临时装。【教学方法】自学法、启发式、合作【课时分配】1 课时【教学过程】教学内容学生活动教师活动复习：显微镜的使用学生思考并回答问题：在显微镜观察过程中，如何移动物像？如何调节清淅度？阅读并明确：必须使可见光能穿过被观察的物体，这样才能看清物象。因此，观察的材料一定要薄而透明。为了做到这一点，需要对所观察的材料进行处理，制成玻片标本，然后进行观察通过上节内容提出问题创设情景。当你学会使用显微镜之后，想不想看看真实的细胞？想不想看看很多我们肉眼看不到的微观世界？你想过生物材料需经过怎样的处理才能看清细胞吗？把一个叶片放在显微镜下就能看到细胞吗？讨论教材中的“想一想，议一议”分步提问：引导学生讨论教材中的名师精编优秀教案引入新课。完成学案导学提纲“一、常用的玻片标本种类和要求”（1）-（4）。通过观察结果，分析得出结论：观察的材料不能太大、太厚，需要把叶片变小、变薄、变透明。“想一想，议一议”。1、萌萌能在显微镜下观察到菠菜叶细胞吗？2、为什么萌萌不能观察到菠菜叶细胞？3、怎样做才能观察到菠菜叶细胞？4、把菠菜叶横切成很小很薄的细丝，制成临时装片，再用显微镜观察，现在大家看到了什么？5、对比两次实验观察材料的不同，你有什么发现？一、常用的三种玻片标本：1、玻片标本的类型：1、切片2、涂片3、装片结合 P42 第 3、4、5 段内容 观察实验台上的 切片、涂片、装片。观察载玻片、盖玻片、观察永久标本及临时装片完成学案导学提纲“一、常用的玻片标本种类和要求”（5）进行简要介绍：玻片标本的制作需要：载玻片、盖玻片玻片标本的类型：1、按材料分为：切片、涂片、装片2、按存放时间分为：永久玻片、临时玻片二、实验（一）、制作洋葱鳞皮叶表皮细胞临时装片在预习的基础上，在教师的指导下进行阅读，通过教师的演示，掌握仪器的正确使用方法。进行实验操作和观察：1、用洁净的纱布擦拭载玻片、盖玻片-注意事项朝同一方向擦拭。2.、用滴管在载玻片的中央滴一滴讲解并引入实验：阐述目的要求：P42 实验的目的要求 1.2.3。介绍材料用具：让学生进行认识，清点材料用具，注意仪器使用的讲解。介绍实验方法步骤和操作要领。强调注意事项：（1）滴管的正确使用；（2）清水水滴大小。（3）撕取的技巧：可用刀片划一个文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 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HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6名师精编优秀教案观察临时装片清水。-讨论：水滴太大或太小会造起什么后果？3、撕取洋葱皮叶内表皮片，浸入水滴中，用镊子展平。4、用镊子夹起盖玻片，使它一端先接触载玻片上的水滴，然后缓缓地放下，盖在标本上。-思考：这样做的目的是什么？5、把一滴稀碘液滴在盖玻片的一侧。用吸水纸从盖玻片的另一侧吸引，使染液浸润标本的全部。完成学案导学提纲“二”复习显微镜的使用小方块；（4）镊子的使用；（5）展平的技巧。（6）盖盖玻片的技巧。小结强调注意事项：1.滴碘液不宜太少；2.染色时间要充分直到浸润标本全部；3.在染色过程中，为提高速度，滴碘液一侧可适当抬高，高于放吸水纸的那一端；4.染色后，用吸水纸将多余的液体吸干，以防污染载物台。指导学生观察制作的临时装片。三、练习画细胞结构简图观察、理解教师的讲解与示范。学生练习画细胞结构简图讲述、演示：结合P44附 生物图的画法和注意事项讲解并在黑板上演示，讲解细胞结构简图的绘制方法与技巧。四、植物细胞的结构与功能1、细胞的基本结构：2、细胞各部分的功能。观察：P45 图 2-2 植物细胞模式图及植物细胞模型。根据观察、阅读理解的结果进行交流。完成学案导学提纲“三、植物细胞的一般结构及功能。”引导学生结合实验观察进行阅读理解细胞的基本结构：细胞壁、细胞膜、细胞核、细胞质（内含叶绿体、液泡等细胞器）【课堂小结】本节课我们通过制作并观察植物细胞的临时装片，认识了植物细胞的基本结构（根据板书师生共同说明植物细胞的结构与功能），还学会了制作临时装片的方法和画生物简图的注意事项。【课堂练习】讨论：1.P44 讨论2.P45 练习 1、2、3、4文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 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HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6名师精编优秀教案【课后作业】1、顶尖 p17-18【板书设计】第二节植物细胞一、玻片标本1、按材料分为：切片、涂片、装片2、按存放时间分为：永久玻片、临时玻片二、实验：观察植物细胞1、制作临时装片：观察洋葱鳞片叶表皮细胞步骤：擦 滴 撕展盖染 吸2、画植物细胞结构图三、植物细胞的基本结构和功能细胞壁保护和支持细胞；细胞膜保护并控制物质进出；细胞质缓缓流动，可以加速细胞内外的物质交换，含叶绿体。细胞核含有遗传物质；液泡-内含细胞液【教学反思】文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 ZU1I10G1S4I6文档编码:CF1B4B4K8I8 HI5Z10Q8T5W2 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