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Unformatted text preview: CELL MEMBRANE 1. Properties: a. Thin, flexible membrane b. Semipermeable (selectively permeable) membrane 2. Function: a. Controls the movement of nutrients, wastes across the membrane b. Site of some metabolic reactions - production of energy 3. Composition: a. Phospholipids & proteins b. Structure of phospholipids: 1). Phosphate “head” - hydrophilic 2). Fatty acid “tails” - hydrophobic 4. Bilayer of phospholipids forms cell membrane a. Proteins molecules: 1). Some extend through both lipid layers forming pores 2). Some adhere to inside of membrane - usually enzymes 3). Some capable of movement between the lipid layers b. Fluid mosaic model - lipids in fluid state, structure is constantly changing c. Movement across the membrane 1). Passive transport - osmosis, diffusion, facilitated diffusion 2). Active transport...
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.
- Fall '09