BIL 150 Chapter Notes - Chapter 7: Unsaturated Hydrocarbon, Fluid Mosaic Model, Lipid Bilayer
Document Summary
Reduces membrane fluidity at moderate temperatures by reducing phospholipid movement. At low temperature, it hinders solidification by disrupting the regular packing of phospholipids: membranes must be fluid to work properly. Transport proteins that aid in facilitated diffusion or active transport. A cell"s ability to distinguish one type. Cell-cell recognition: some glycoproteins serve as identification tags that are specifically recognized by membrane proteins of other cells. Intercellular joining may hook to together in various kinds of junctions. Carrier proteins hold onto their passengers and change shape in a way hat shuttles them across the membrane. The concentration gradient itself represents potential energy and drives diffusion: the diffusion of free water across a selectively permeable membrane, whether artificial or cellular, is called osmosis. Going from a region of higher free water concentration to that of a lower free concentration until both sides of the membrane are more near equal.
