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Unformatted text preview: PreLab: questions to answer before doing the lab Hannah Kim September 21, 2009 Lab 1: Diffusion and Osmosis 1. What are you supposed to be learning about by doing the lab? The goal of this lab is to find out how osmosis and diffusion works. Diffusion is the movement of molecules from an area of higher concentration of molecules to an area of lower concentration. Osmosis is the diffusion of only water through a selectively permeable membrane. Once the concentration of water is equal on both sides, the cell has reached equilibrium and therefore will not have any net change in the water concentration. Some substances move through cell membranes through active transport, which requires ATP. Active transport moves substances from low concentrations to regions of higher concentration usually, but this can vary. Also, if a cell has too much water, then it will lyse (or explode) while if there vary....
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This note was uploaded on 09/22/2010 for the course ABD. 39283 taught by Professor Dr.met during the Spring '10 term at Aachen University of Applied Sciences.
- Spring '10