第2节细胞的多样性和统一性（The diversity and unity of the second cell）.docVIP

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第2节细胞的多样性和统一性（The diversity and unity of the second cell）.doc

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第2节细胞的多样性和统一性（The diversity and unity of the second cell）

第2节细胞的多样性和统一性（The diversity and unity of the second cell） The diversity and unity of the second cell I. teaching objectives 1. tell the differences and connections between prokaryotic cells and eukaryotic cells. 2. analysis of the establishment of cell theory. 3. use a high power microscope to observe several kinds of cells and compare the similarities and differences of different cells. 4., identification of cell theory is a process of development, inheritance, correction and development. It also discusses the role of technological progress in scientific development. Two, teaching key points and difficulties 1. teaching focus (1) observe several kinds of cells with high power microscope, and compare the similarities and differences of different cells. (2) analysis of the establishment of cell theory. 2. teaching difficulties The differences and connections between prokaryotic cells and eukaryotic cells. Three, class arrangement Two Four, teaching process [introduction] the introduction of question inquiry allows students to look at, discuss, and answer questions. [hint] 1. we can see at least 5 kinds of cells in the picture, they are red blood cell, white blood cell, oral epithelial cell, split plant cell and onion epidermal cell. The common structures of these cells are cell membranes, cytoplasm and nuclei (plant cells and cell walls, and human mature red cells without nuclei). 2. clew: the cell has different morphological structure, because the cell in the organism is located in different position, function is different, it is the result of cell differentiation. For example, red cells are double concave round cake shaped, which is conducive to full contact with oxygen, play a role in the transport of oxygen; onion epidermal cells are cuboid shape, arranged tight, is conducive to play a protective role. [problem] arouse students thinking and attention with the focus of this section. [blackboard writing] first, observe the cells (how to use a high-powered microsco