Dennis Baca Osmosis Lab: Conclusion Biology: 1 Period: 5 11/13/15 In conclusion, I learned that the cell membrane is able to select what can come into the cell, and just how selective it is. I also learned more about how diffusion and osmosis is able to work in conjunction with passive transport. In conducting this lab I used dialysis tubing, as mentioned in the introduction it is a synthetic membrane and acts as a cell membrane, one example is filtering wastes from a person’s blood with a kidney
selectively permeable membranes. For instance, during activity A, the iodine and water mixture, was seen to have diffused into the cell membrane, due to the starches color change to a dark blackish blue. Furthermore, at closer examination, it is shown that the iodine is the hypotonic solution, that diffused into the hypertonic solution, in order to accomplish equilibrium. In comparison, activity B also demonstrated the diffusion of water through the cell membrane. Furthermore, the glucose was discovered
Graham. (Britannica, n.d). This lab shows the rate of osmosis between three different concentrated cells and their outer environment. The dialysis tube mimicked the purpose of a cell membrane and the water in the beaker acted as the exterior environment. It was hypothesized that as the concentration gradient increases, so does the rate of osmosis; the greater the concentration difference, the faster the rate of osmosis. This was what was shown throughout this lab the dialysis
Introduction This lab was created so students could study certain cells under a microscope. A Prokaryotic cell has no true nucleus. While an Eukaryotic cell has a nucleus. To be more specific Humans are made up of many Eukaryotic cells and an example of an organism made up of Prokaryotic cells would be bacteria. Weather the cell is a Prokaryotic or Eukaryotic they will both contain a Cell Membrane, Ribosomes, and they will both contain DNA. The Endosymbiotic Theory is an evolutionary theory that
Introduction Cells like to have some control over what gets in and what goes back out. This is called selective permeability (Tamarkin 2011). Two ways small particles can get past the cell membrane are through diffusion and osmosis (Tamarkin 2011).The terms diffusion and osmosis refer to the way small particles move. They are both examples of passive transport (Tamarkin 2011). Diffused particles move in a concentration gradient (Tamarkin 2011), which means they both move from areas of high concentration