Diffusion and osmosis

1. a) Bulk movement is the overall movement of a fluid. The molecules all move in the same direction. Diffusion however is the random movement of molecules which usually results in a fairly even distribution. In other words the movement is not guaranteed to move in one direction but the probability that it will move in the lower gradient is greater. Osmosis is similar to diffusion but is differentiated by the membrane's behavior. The cell membrane …

…This happens because a 1% sugar solution is isotonic with that of the 1% sugar solution in the tubes. The 2% sugar solution was increased because the substance was hypertonic. The membrane did not allow the hypertonic solution to exit because the pressure from the hypotonic solution was forcing water in. This later reached an equilibrium when the hypertonic solution was gaining water potential and the water stopped rising. The vice versa happened in the distilled water solution.