Table of ContentsAimMaterialsMethodDiscussionConclusionCells have been loosely defined as the building blocks of all living things. All cells are contained by cell membranes, which provide the structure of the cell (Cooper. G, 2000). The cell membrane is a semi-permeable membrane that surrounds the cytoplasm of a cell and is made up of a phosphorus-lipid bilayer (Cell Membrane, 2014). Cellular diffusion occurs across the cell membrane as a means of transporting substances into and out of the cell (Nave R, n.d.). Cellular Diffusion According to the Biology Corner, diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration (2012). Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get an Original Essay There are three main types of cell broadcast, namely: simple, channeled and facilitated. Simple diffusion occurs when a particle with a neutral charge and a size small enough to pass through the phospholipid layer passes through the membrane. The molecule must also be hydrophobic, so that the protein can move to the outer side of the membrane without being "rejected" like hydrophilic molecules are. Channel diffusion is a passive transport process in which molecules that do not meet the requirements for simple diffusion use protein channels to cross the cell membrane. The process of facilitated diffusion requires carrier proteins to move molecules from one side of the membrane to the other (Diffusion, n.d.). Osmosis is the diffusion of water across the cell membrane from areas of lower solute concentration to areas of higher solute concentration (Khan, 2010). “In terms of osmosis, the solute refers to all the molecules or ions dissolved in water (the solvent)” (American Society for Microbiology, 2013). Osmoregulation is related to osmosis because it prevents body fluids from becoming too diluted or too concentrated. When the osmotic pressure of a solution is high, the more water present wishes to enter that solution (Rybicki, 2009). A hypotonic solution occurs when the concentration of the solute is lower than that on the outer side of the cell membrane. The opposite is true for hypertonics (All Nurses, 2011). Animals and plants are multicellular and are specialized in their functions and roles in the body or organism. Cells in animals can play roles such as carrying oxygen around the body, and in plants they absorb sunlight, water and materials to carry out processes such as photosynthesis (BBC, 2014) . It's the same in humans, because the body's cells are specialized, each fulfilling its own role. As a fish contains bodily fluids and is always surrounded by a fluid environment, it uses the process of osmoregulation to maintain a balance between salt and fresh water in the fish's body. Osmoregulation is also relative to osmotic pressure, because this pressure prevents osmosis from occurring in a specific solution when it is separated from the solvent by a semi-permeable membrane (Duxbury, 2012). environment has osmosis through a semi-permeable membraneHypothesis: It is hypothesized that distilled water should flood the beakers and dialysis tubes that contain the salt saline solutions to dilute the solute due to osmoregulation (Saladin, 2000). It is also expected that when solutions are isotonic, the weights should berecurring (Innovateus, 2006).Materials4 x 100 ml beakers4 x dialysis tubes4 x elasticsMarker penDistilled waterSaltMethod500 ml of distilled water was put in a beaker and 17.5 grams of salt was measured on electronic balances and added. It was stirred until the salt dissolved to create a saline solution that would serve as the salt water for the experiment. An additional 500 ml of distilled water was placed in a separate beaker to serve as fresh water for the experiment. 4 transparent dialysis tubes were tied at one end. Two of the dialysis tubes were filled with approximately 10 grams of distilled water and two with salt water, then they were weighed on an electronic balance and the weight was recorded. The dialysis tubes were placed in 4 smaller beakers, 2 containing salt water and 2 containing distilled water, with rubber bands holding them in place. One tube of saline and one fresh tube were placed in the beakers containing saline and the remaining tubes were placed in the beakers of distilled water. After 48 hours, the dialysis tubes were weighed and compared to the original recordings to measure the rate of osmosis that occurred through the dialysis tube. The variables that occurred while performing the osmosis practical exam and the limitations of these errors/variables.DiscussionThe Objective The objective of this experiment was to demonstrate the effect of environmental changes on osmosis through a semi-permeable membrane. To demonstrate this, the different environments used were saline solution and distilled water to represent saltwater and freshwater environments. A dialysis tube was used to represent a semi-permeable membrane in which osmosis could occur. It was hypothesized that distilled water would surge into the beakers and dialysis tubes containing the salt saline solutions to dilute the solute due to osmoregulation. The results showed that the beakers and dialysis tubes in each of the experiments lost weight. These results contradict the research carried out before this experiment was carried out. However, these results are likely to be unreliable due to errors in carrying out the experiment or unforeseen factors such as evaporation. This includes water spilling onto the balance when measurements were taken and water spilling when the beakers were transported from the practice bench to another bench for examination. Additionally, when weighing the dialysis tubes, they had to be held in place so water would not leak out, which could have resulted in the weight of the hand holding the tube being measured as well or the tube being held too tightly. high. , resulting in less weight to record. This experience could have been improved by carefully handling the beakers during transport and when placing them on the electronic balance to be weighed. When the dialysis tube was weighed, the other end could have been tied off, eliminating the need to hold the dialysis tube and record additional or less weight. Another limitation of this experiment was that it could only be checked during the next biology theory class, which meant that the length of time the experiment should be left for could not be chosen. Additionally, the duration was not measured or recorded. This could have been avoided by predicting the duration of the experiment and measuring it with a stopwatch. Due to these limitations, the results of the experiment could have been falsified during the process of the experiment. So, although the results contradict the hypothesis, it is likely that if the experiment were repeated, taking into account the mentioned adjustments, the results would be different. Further research should be.