BCMB 311 Study Guide - Midterm Guide: Phospholipid, Phospholipid Scramblase, Lipid Bilayer
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16 Dec 2016
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Although it serves as a semi-permeable barrier, it also has several important functions, including cell communication, import and export of molecules, cell growth, and motility. A protein-studded, fatty film so thin that it cannot be seen directly in the light microscope. Uses to separate and protect its chemical components from the outside environment. Consist of a two-ply sheet of lipid molecules about 5 nm thick. To facilitate exchange, the membrane is penetrated by highly selective channels and transporters. Proteins that allow specific small molecules and ions to be imported and exported. Other proteins in the membrane act as sensors or receptors that enable the cell to receive information about changes in the environment. Communication -> info has to be sent & received. Fluid mosaic -> lipids & proteins are in no static position. Hydrophilic loves water & faces the outside of the cell.