“In this lab, our purpose was to find out what can pass through a selectively permeable membrane, called diffusion, in a model cell. Part of this question was to find out what happened when things, such as water, did pass through the membrane. Later, we found out what happens when things pass through membranes, such as those of red blood cells. Our question was whether or not the substances in the tubes were clear enough to read through. To find the answers to these questions, we used the Laboratory Manual, a Handout, the skj journal, and science magazine. We used these sources to help us do the lab, and to guarantee we got the right answers to our questions from doing the lab. In our first experiment, our hypothesis was that there would be no change in the size of the model cell because the solutions are isotonic. Alternately, our hypothesis was that the cell would change sizes due to the difference in concentration of the solutions. In the second experiment, we hypothesized that only one or two of the tubes would become clear enough for us read through. Our alternate hypothesis for this experiment was that all of the tubes would become clear enough to read through. From our results, we can conclude that our alternate hypothesis was mostly correct for part A; our original hypothesis was supported by the data in the second part of the lab.”