Diffusion Lab

Objective The purpose of this experiment was to directly observe the diffusion of the material on the permselective membrane. Diffusion refers to the movement of molecules from a high concentration region to a low concentration region until the two concentrations are equal or can be referred to as a more profoundly balanced one. This concept is the concept we are currently studying in biology. Divide the procedure into two groups, and confirm that each group has the following materials in the laboratory. Man

The laboratory called "diffusion and penetration" develops mainly on the diffusion of cell membranes and the way in which substances move and concentrate and diffuse. Diffusion and invasion are both forms of movement and are part of the passive transport of cell membranes. Diffusion is the movement of solute from high concentration region to low concentration region. Water diffuses through the cell membrane. Invasion, in particular movement of water through the membrane. This means that they do not require energy or pump, because both penetration and diffusion are part of passive transport. Propagation creates various environments. It has low permeability, high permeability and isotonic environment. Hypotonicity is when the solution has a lower solute concentration than the water potential. The hypertonic solution has high solute concentration and low water potential. In our laboratory we are using a hospital program to simulate diffusion and invasion

The purpose of this experiment was to observe the penetration rate and diffusion rate, as well as the effect of particle size on this rate. The first part of the experiment is proof of penetration and diffusion. This includes raisins in various liquid environments, each containing different concentrations of sugar. In the fourth part of the laboratory, we use the same idea as the demonstration to place objects in various concentrations of substances, but Elodea leaves brine in this case. In both cases, objects with high concentration of substances are removed from the water. However, if the concentration of sugar or salt is very low or not at all, the object will not lose moisture, but in the case of raisins the excess moisture will be saturated. The second part of the experiment included how the penetration rate and molecular size affected it. The third part of the experiment is to observe the effect of molecular size on diffusion rate.