1. 1. A brief history of studies on the structrure of the plasmic membrane 的 A. Conception: Plasma membrane(cell membrane), Intracellular membrane, Biomembrane B. The history of study ◇ Overton(1890s 200 Lipid nature of PM1. 1. A brief history of studies on the structrure of the plasmic membrane A. Conception: Plasma membrane(cell membrane), Intracellular membrane, Biomembrane. B. The history of study Overton(1890s): Lipid nature of PM;