'2.03 Cell Membranes and Homeostasis Essay\r'

'Objective(s): The antecedent for this examine is to see how amylum and iodin chance on distributively another(prenominal) and how a plastic wallet works similar to a membrane in certain situations. Introduction: I know precedent to doing this experiment that iodine mixed with amylum creates a dark color and that most objects, organic and inorganic, of course experience isotonic reactions. Hypothesis: I recall that the potato will gull much stiffen than the sweet potato and they will both absorb relatively similar summates of weewee. Procedure: Variables: Controlled- wet and size of potatoes. Manipulated variables- potatoes growth based on confine of solution. info:\r\nData and Observations\r\nBag ContentInitial color of water/iodine solution in the cupFinal color of the solution in the cup Starch and Water\r\nDark blue, purple Blackish Blue\r\nWaterOrangeyOrange\r\nAnalysis Questions\r\nPart 1\r\n1.Restate your opening and discuss if the observed results supp orted the hypothesis. -Based hit what I observed, my hypothesis, stating that the potato will absorb more starch than the sweet potato, was correct. 2.Identify the control and variables in your experiment.\r\n-Variables: Controlled- water and size of potatoes. Manipulated variables- potatoes growth based on contents of solution. 3.Why do we observe the color of the solution in the lead adding the devise cornerstones to each cup? -To make certainly that the solutions contain the necessary contents. 4.Based on your observations, is the sandwich bag permeable to starch? To iodine? -Iodine is permeable to the sandwich bag, while starch is not. 5.Look up the molecular structures of starch and iodine, and make enforce of those structures to explain your observations. -Starch is a more interlinking compound than iodine, making it easier for iodine to pass by dint of objects. 6.If a balance was available, describe how you could use it in this experiment and what the purpose would b e. -The balance could be apply to also see the difference is\r\nthe potatoes before and after(prenominal) the observation time. 7.Living organisms ar made of cubicleular telephones.\r\nThose cells must gather nutrients and gases in auberge to undergo the metabolic processes that mention homeostasis. In paragraph form, explain how you think the nutrients and gases place the cell. Distinguish between the molecules that substructure enter by dissemination by simply moving dogways the membrane and those that must expend energy to cross the cell membrane. -Nutrients enter cells in to major ways, with active and dormant have a bun in the oven. When a molecule uses diffusion or other processes that require no energy, they are using passive transport. An example molecule for this would be water or glucose. Other molecules, that need to use energy to enter a cell use active transport. Many molecules that use this are macromolecules, same proteins. Molecules use one of these ii transports to enter a cell. 8.List three criteria cells use to select materials to enter or leave the cell.\r\nThen explain the role of each criterion in determining the type of transport a cell will use for dissimilar sized molecules. For instance, small molecules move across the membrane by diffusion, given they are moving with the constriction gradient. -Water can enter the cell in order to balance the amount inside to the amount of the environment. This is passive collect to the fact that it happens without any external energy. -Some molecules can pass into the cell by facilitated diffusion. This is passive due to the nature of diffusion and because the solute is moving down its engrossment gradient. †Sodium is moved out of an animal cell while potassium is moved into the cell by the sodium-potassium-pump. This is by dint of active transport because it uses energy.\r\nRestate your hypothesis and discuss if the observed results supported the hypothesis. -Based off w hat I observed, my hypothesis, stating that the potato will absorb more starch than the sweet potato, was correct. 2.Use your observations to explain if each type of cell (potato, sweet potato/pear/apple) was isotonic, hypertonic, or hypotonic to each of the solutions. Explain what happened to each type of cell in response to the type of solution it was in. -Potato- it was hypertonic and gained water in the water solution. In the starch solution, it was hypotonic. - gratifying Potato- it was hypertonic in the water solution and went through plasmolysis in the starch solution. 3.Based on the observed intensity level changes, which of the vegetables/fruits used in this experiment has a great amount of sucrose in its cells? Explain your answer. -The Sweet Potato seemed to have an originally larger amount of sucrose in its cells. Conclusion: In conclusion, it seems alike(p) the hypothesis was relatively correct.\r\nFrom the data collected from the experiment, the two potato samples w ere subjected to different solutions. The potato was hypertonic to the distilled water and hypotonic to the starch solution. The sweet potato, on the other hand, was a little harder to determine, though it was obvious that it was hypertonic to the distilled water, it was hard to determine if it was hypo-,hyper-, or isotonic. Since it was hard, I did a little research and realized that what I was visual perception was the sweet potato going through plasmolysis. This experiment was somewhat difficult due to the fact that I was observing periodically, but it seems like it was a success.\r\n'