1　课题的提出和引入初中学生学习细胞吸水原理的知识 ,仅限于对植物细胞吸水或失水的了解 ,而动物细胞吸水的原理是否与植物细胞一样 ,对学生来说仍是一未知领域。以此为出发点 ,设立研究课题——研究动物细胞的吸水原理。让学生通过提出猜想 ,设计实验进行验证 ,总结结论 ,然 1 The introduction of the subject and the introduction of junior high school students to learn the principle of cellular water absorption knowledge, limited to the understanding of plant cells water or water loss, and animal cells absorb water whether the principle and plant cells, is still an unknown area for students. Using this as a starting point, set up a research project - study of water absorption principle of animal cells. Let students through the conjecture, design experiments to verify, conclusion conclusion, of course