Diffusion Types

Diffusion Types - electrochemical gradient, rate of...

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Mucociliary: the cilia on the mucus-lined set of tubes Sputum: mucus + crap Chronic endobronchial bacterial colonization: bacteria inside the bronchioles forever! Pancreatic insufficiency: pancreatic enzymes cannot be transported Electrochemical gradient: chemical gradient - solutes tend to move from more concentrated areas to less concentrated areas; electrical gradient - harged solutes tend to move towards an oppositely charged environment (cells are universally more negative on the inside than the outside, typically ≈ -70 mV) Facilitated diffusion: transport protein accelerates the movement of a solute down it’s
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Unformatted text preview: electrochemical gradient, rate of facilitated diffusion is much higher than passive diffusion, specific, saturable transport; examples: ion channels, glucose transport into cells, ATP transport out of the mitochondrion o Ion channels: pore-forming proteins that help establish and control the small voltage gradient across the plasma membrane of all living cells (see cell potential) by allowing the flow of ions down their electrochemical gradient Passive diffusion: t ransport of a substance across a cell membrane by diffusion; expenditure of energy is not required...
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This note was uploaded on 04/23/2011 for the course BIME 2102 taught by Professor Kim during the Spring '11 term at UVA.

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