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Membrane biology

Anatomy and Physiology

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CELL OUTLINE I. Cell Defined living structural and functional units enclosed by a membrane arise from existing cells by cell division different types fulfill unique roles that support homeostasis and contribute to the functional capabilities of human organisms the form of the cell follows the function II. Parts of a Cell A. Plasma Membrane - (page 62) form?s the cell?s flexible outer surface, has a permeable barrier that regulates flow of materials in and out of cell. Also plays a key role in communication among cell. (outside layer of cell) i. Phospholipid Bilayer - basic framework of the plasma membrane. - 2 back-to-back layers - 3 types lipid molecules phospholipid 75% cholesterol 20% glycolipid 5% - amphipathic - have both polar and nonpolar parts

biology study guide with answeres

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Modified STUDY GUIDE for BIOL 121 for Chapters 5, 6, and 7 with many specific answers included. Spring 2011 Chapter 5 Figures to know: 1 -5, 8, 9, 11, 13, and 15. 5.1 Review phospholipids (p 41) and “phospholipid bilayer” membrane (p 58). Use fig 5.1 to describe how all cell membranes are described as a “fluid mosaic”. Fluid Mosaic: The phospholipids and proteins together are not a solid wall, but a very flexible structure. The word “mosaic” means that the proteins are interspersed among the phospholipid molecules. The phospholipids are by far the most abundant molecules in the membrane and form the “flexible barrier”. List and describe the 6 basic types of functions that membrane proteins have:

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