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一、创设情境,导入主题图片展示各种各样的细胞,引导学生回顾细胞的边界是什么?细胞膜的成分有哪些?细胞膜的功能是什么?接着引入细胞膜的这些功能,它们应该有怎样的结构才能与之适应呢?一百多年前的科学家对生物膜的功能有着浓厚的兴趣,但是由于细胞膜很薄,光学显微镜无法观察研究,那该如何入手呢?设计意图:一节课要有一个好的开端,快速、简洁地引入课题,激发学生学习兴趣是关键。
First, the creation of situations, the introduction of the theme of the picture shows a variety of cells, guide students to review the cell boundaries What is the composition of the cell membrane What is the function of the cell membrane? Then the introduction of these functions of the cell membrane, they should have what kind of structure To adapt to it? More than 100 years ago scientists have a strong interest in the function of biofilms, but because of the thin cell membrane, optical microscopy can not observe the study, then how to start it? Design intent: a class to have a A good start, quick and concise introduction of topics, to stimulate students interest in learning is the key.