运载体学说

• 作 者: 於毓文
• 机 构: 中国医学科学院药物研究所药理系 北京
• 出 处: 生理科学进展
• 发表日期: 1964年03期
• 关键词: 生物膜 载体学说 底物 速率 腺管 屏障功能 磷脂酸 易化扩散 通透性 被动扩散

生物膜的通透性广义地说,物质或离子通过任何活体结构的速率,与通过相当水层时的速率明显不同者,这种结构均可认为是生物膜。这样,生物膜就不限于单层结胞膜,也可包括隔开两相的细胞薄层,如毛细血管壁、小肠上皮、各种腺管等。物质穿过这种结构时,会遇到多层结胞膜,并且还有通过胞浆的问题。但是细胞膜在构成机体各种屏障功能中,显然居于首

Biofilm Permeability Broadly speaking, the rate at which a substance or ion travels through any living structure is significantly different from the rate at which it passes through an equivalent aqueous layer. Such a structure can be considered a biofilm. Thus, the biofilm is not limited to a single layer of conjunctiva, but may also include a thin layer of cells separated by two phases, such as capillary walls, small intestine epithelium, various types of glands, and the like. When material passes through this structure, it encounters multiple layers of conjunctival membranes and there is also the problem of passage through the cytoplasm. However, the cell membrane in the body constitutes a variety of barrier function, apparently living in the first