“稳态”和“环境”是贯穿必修3模块的核心概念。“个体水平的调节与稳态”内容比较抽象,难度比较大。但这部分知识在生物学中是基础中的基础,同学们必须了解稳态的生理意义,理解单细胞与环境的物质交换,知道内环境的组成成分及相互关系,理解稳态的调节机制以及内环境稳态与健康的 “Steady State ” and “Environment ” are core concepts throughout the compulsory 3 modules. “Individual level adjustment and steady state ” content is more abstract, more difficult. However, this part of knowledge is the foundation of biology. Students must understand the physiological meaning of homeostasis, understand the material exchange between single cells and the environment, know the components of internal environment and their interrelations, understand the regulation mechanism of homeostasis and Internal environment steady and healthy