bio 1201 notes4

bio 1201 notes4 - o Facilitated diffusion Diffusion: o...

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Membrane Permeability: o Size and shape of molecules Small molecules are more permeable then large molecules o Solubility in lipids Base layer is soluble lipid; permeable to membrane o Net electric charge Charged polar not soluble or permeable to membrane o Other chemical properties Water always freely permeable Polar; not lipid soluble but still freely permeable Cystic Fibrosis: o Predominant in some human populations o Genetic disorder o Gene 7 th chromosome o Treated but not cured o Affects sweat glands, impacts Cl- movement, fertility, mucus build up in lungs and digestive tract o Thick mucus in the lungs o Causes breathing problems and increase lung infection Cause: non-functional Cl- ion transporter What is the chloride ion channel in individuals with Cystic Fibrosis? (CFTR)
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Unformatted text preview: o Facilitated diffusion Diffusion: o Physical property of matter o Individual molecules move randomly, but the net effect in non-random o The force that moves them: G=H-TS (Free energy) o After breaking down: G=-S o Example: On which side do the molecules have greater free energy? The right side, less molecules, they will move towards the right What will happen if the molecules can move? Net movement? Energy change Osmosis: o The net movement of water across (through) a semi-permeable membrane Terminology of Solutions: o Hypertonic: more concentrated o Isotonic: equal concentration o Hypotonic: Less concentrated...
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bio 1201 notes4 - o Facilitated diffusion Diffusion: o...

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