Ap Biology Lab One Report

AP Biology Lab One
1 December 2008
Diffusion and Osmosis
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Diffusion and osmosis be processes that are constantly occurring in cells and tarradiddle for much of the passive fitment of molecules (Lab Bench Activity). Diffusion is the extempore movement of molecules along a concentration slope; from an celestial sphere of higher concentration of those molecules to an area of lower concentration. Diffusion is indeed basically the net movement of molecules down their concentration gradient until there is equilibrium (Lab Bench Activity). For example, if a bottle of heart and soul is opened at the front of a room, it will non be long before people get ahead and further from the source can smell the perfume. Osmosis is a special model of dispersal that involves the passive transport of pissing (Lab Bench Activity). It is the diffusion of water through a selectively permeable tissue layer (a tissue layer that allows for diffusion of certain solutes and water) from an area of higher water emf to an area of lower water potential. Water potential is the measure of free energy of water in a solution (T. Goldberg, Deborah). An example of osmosis occurring would be if a red family cell is placed in fresh water.



There are more free water molecules outside the plasma membrane then inside the cell, so osmosis occurs; water diffuses through the blood cell, causing it to swell and burst (Lab 1 Osmosis).
Diffusion of scurvy molecules can be observed through dialysis tubing, which serves as a selectively permeable membrane. Small solute molecules and water molecules can move freely through a selectively permeable membrane, alone larger molecules will pass through more slowly, or perhaps not at all (T. Goldberg, Deborah). The movement of a solute through a selectively permeable membrane is called dialysis.
Dialysis tubing can also be used to model the descent between solute concentration and the movement of water through a selectively permeable membrane by the process of osmosis...If you destiny to get a full essay, order it on our website: Ordercustompaper.com



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