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Unformatted text preview: Active Transport Passive Transport Processes Simple Diffusion o Down concentration gradient o Depends on molecular movement o Does not require supplied energy o Does not use a carrier molecule Passive Transport Processes Facilitated diffusion o Down concentration gradient o Depends on molecular movement o Does not require supplied energy When concentrations on both sides of a barrier are equal o Molecules keep moving o There is no net change in solute concentration. Semi-permeable barrier Only some types of molecules pass through. Diffusion Movement of molecules down concentration gradient. From regions of high concentration to low concentration regions. Movement of Water across Membranes From High to Low water potential. Osmosis Diffusion of water From higher (fewer solutes) water potential to lower water potential....
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This note was uploaded on 04/07/2008 for the course PETE 2001 taught by Professor Thurber during the Spring '07 term at LSU.
- Spring '07