Substances can move into and out of cells through the cell membrane. The three main types of movement are diffusion, osmosis and active transport. Osmosis is the diffusion of water across a membrane. Like other molecules, water will move from an area of high concentration to an area of low concentration. If a red blood cell is placed in water, water enters the cell by osmosis. Because the membrane is quite weak the cell will burst as the volume and therefore the. However, if you would like to, you can change your cookie settings at any time. Structure and Function of Plasma Membranes. Clippen bietet eine praktische Möglichkeit, die wichtigsten Folien einer Präsentation zu sammeln und zu ordnen. SlideShare Entdecken Suche Sie. Read about our approach to external linking.