LAB 3 - Cell Physiology

LAB 3 - Cell Physiology - LAB 3 Cell Physiology Eukaryotic...

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LAB 3 – Cell Physiology Eukaryotic cellular membranes are fluid mosaics of lipids and proteins Membrane structure results in selective permeability Transport: Passive (simple diffusion, facilitated diffusion, osmosis) Active (ATP-driven , e.g. Na + -K + pump) Bulk (endo- and exocytosis) Phospholipid bilayer Hydrophilic region of protein Hydrophobic region of protein Hydrophilic region of protein
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Passive Transport Through the Cell Membrane DIFUSSION – small, non-polar molecules like O 2 and CO 2 OSMOSIS – diffusion of water (small, polar molecule) across a selectively permeable membrane Aquaporins – water channel proteins Ion channels and protein channels are required for charged molecules and larger, uncharged, polar molecules Facilitated diffusion passive diffusion with the help of a transport protein (a. channel proteins and b. carrier proteins)
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Passive Transport Through the Cell membrane Carrier proteins for small, hydrophillic molecules like glucose (glucose
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This note was uploaded on 03/22/2010 for the course BISC 120 taught by Professor Webb,wetzer,? during the Fall '07 term at USC.

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LAB 3 - Cell Physiology - LAB 3 Cell Physiology Eukaryotic...

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