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一、知识梳理(一)人体的内环境与稳态1.细胞生活的环境(1)体液:体内以水为基础的液体,包括细胞内液(约占2/3)和细胞外液(约占1/3)。(2)内环境:体内细胞生活的直接环境,由血浆、组织液和淋巴等细胞外液组成。(3)内环境的理化特性①渗透压:指溶液中溶质微粒对水的吸引力。大小主要取决于单位体积溶液中溶质微粒的数目,与溶质微粒的数目呈正相关,即浓度越大渗透压
First, the knowledge of combing (a) the human body’s internal environment and steady-state 1. The living environment of the cell (1) body fluids: water-based fluids in the body, including the intracellular fluid (about 2/3) and extracellular fluid Accounting for 1/3). (2) The environment: the direct environment of the cell life in the body, by the plasma, tissue fluid and lymph and other extracellular fluid composition. (3) the physical and chemical characteristics of the environment ① osmotic pressure: refers to the solute particles in water attraction. Size depends mainly on the number of solute particles per unit volume of solution, and the number of solute particles was positively correlated, that is, the greater the concentration of osmotic pressure