Transcription of •Diffusion potential- Pump potential- - life.umd.edu
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•Diffusion potential- Pump potential- - life.umd.edu
13. transport can be active or passive. Passive transport is movementdownan electrochemical gradient. Active transport is movementagainst an electrochemical is an electrochemical gradient?How is it formed?Passive and active transport of ions result in electric potential difference across membranes. Movement of an uncharged mol Is dependent on conc. gradient alone. Movement of an ion depends on the electric gradient and the conc. gradient. Diffusion potential- Pump potential- How do you know if an ion is moving uphill or downhill? Nernst EqWhat is the driving force for uphill movement?
Active transport of many ions and metabolites is dependent on Secondary active transport: H+-coupled cotransport (Fig. 6-11) H+ H+ Model of an antiporter Taiz. Evidence that Glucose uptake depends on H+-coupled glucose symport Channels allow rapid passive diffusion of ions.
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