chapter_7_fall_2009_class

chapter_7_fall_2009_class - MEMBRANE STRUCTURE AND FUNCTION...

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Control point for transport of water and solutes into and out of the cell. MEMBRANE STRUCTURE AND FUNCTION Fig. 7.3 Phospholipid bilayer Integral proteins Peripheral proteins Selective permeability
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Fig. 7.8 Fig. 7.8
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diffusion - requires no energy and no protein facilitated diffusion - requires no energy but does require ________________ active transport - requires energy and a transport protein Types of membrane transport
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Diffusion – passive transport of solute molecules Net movement of molecules down a concentration gradient Rate depends on difference in concentration Concentration goes to ___________ Fig 7.11
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Osmosis - diffusion of water across a selectively permeable membrane . Note: Osmosis is the Movement of water Relative terms for solute concentration: Hypotonic – relatively lower solute concentration - high water content Hypertonic – relatively higher solute concentration - low water content ( (Isotonic) - same ______________ concentrations
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Fig. 7.12 Osmosis - hypotonic to hypertonic
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Water Balance in Cells Solute concentration is the same on both sides of the membrane Isotonic Solutions “Healthy” situation for animal or _________ Fig. 7.13 animal plant
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chapter_7_fall_2009_class - MEMBRANE STRUCTURE AND FUNCTION...

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