BIO311C 1nd Edition Lecture 15 Outline of Last Lecture Plasma MembraneOutline of Current Lecture Active and Passive Transport Current LectureActive transport:Driven by ATP Passive transport:Diffusion (facilitated and non-facilitated) Diffusion: Random movement of molecules towards state of equilibrium Alcohol: Moves into the cell through diffusion No system present to stop the movement of alcohol into the cell and therefore the you get “drunk”.Facilitated diffusion:Diffusion facilitated by proteins Osmosis: Water flows towards high solute concentration Water toxicity:Danger to professional athlete or unwary housewife These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Caused by too much water in the cells which causes them to burst Can be prevented by drinking Gatorade instead of plain water Aqua-porins:Water channel proteins Were named by Peter Agre Carrier proteins:Proteins that change shape to change concentration gradient across membrane Equilibrium:Rate of diffusion is zero Constant rate of diffusion means that the proteins are saturated with
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