The Cell Membrane in CellsEssay title: The Cell Membrane in CellsThis can be seen in living cells. The cell membrane in cells is semi-permeable and the vacuole contains a sugar/salt solution. So when a cell is placed in distilled water (high water concentration) water will move across the semi-permeable membrane into the cell (lower water concentration) by osmosis, making the cell swell. This cell is now referred to as turgid. If done with potato cells the cells would increase in length volume and mass because of the extra water.
If these potato cells were placed in a solution with a low water concentration, then the opposite would happen. Water would move out of the cell into the solution. In extreme cases the cell membrane breaks away from the cell wall and the cell is referred to as plasmolysed. The potato cells will have decreased in length, volume and mass.
The greater the concentration of water in the external solution the greater the amount of water that enters the cell by osmosis. The smaller the concentration of water in the external solution the greater the amount of water that leaves the cell.
However, there will be a point where the concentrations of water inside and outside the potato cells are equal (isotonic). At this point there will be no change in the length, volume and mass of the potato, as the net movement of water will be zero, no osmosis has occurred.
Using this information a graph and prediction can be madeAt point A the graph suggests that no osmosis has occurred, suggesting that the concentration of water inside the cell is equal to the solution outside.
At point B (high water concentration), there is no indication that the cell is increasing further in size. This is because the cell is fully turgid and no more water can enter.
At point C (low water concentrations), there is no indication that the cell is decreasing further in size. This is because the cell is fully plasmolysed and no more water can leave the cell.
When making a prediction, you must say what you think will happen and why. It is also very important to have a numerical guess which can be tested in the analysis e.g. when you double the concentration the rate will double.
MethodApparatus: 1 Molar sugar solution, distilled water, potato, cork borer, mass balance, boiling tubes, knife, labels, measuring cylinderPlan: A range of sugar solutions will be prepared with concentrations from 0.2 M to 1.0, in intervals of 0.2, by adding varying amounts of distilled water. Sections of potato will be cut using a cork borer and knife to equal lengths, this will keep the surface area constant and their mass measured. 10 ml of each concentration of sugar will be placed in three test tubes and labeled. To each test tube a cut piece of potato will be added and its mass added to the label. These will be left for 24 hours. Then the potato pieces will be removed, the surface solution removed using paper towels and weighed. Three readings are taken for each concentration in order to get an average and reduce the effect of anomalous results. As
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MethodApparatus: A range of sugar solutions is prepared with concentrations from 0.2 M at all times in intervals of 0.10, 5.5, 25.0 and 25.5 ml. At these intervals, a solution of 0.2 M must be collected and packaged with a thin cover in which it will be hung or placed inside a bottle tightly placed onto an open-top container for storage. It will be kept in a cool position until it re-stores but it still can be used for different purposes. As
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Curing of the potato?
Curing of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure of the potato?
Cure “1”
I am certain that it has been cured; however, I feel that its value cannot be approximated from the means used…
1
If cured, would it help you to gain weight or gain stamina?
If cured, would it help you to gain weight or gain stamina?
For all other problems, you may consider reducing the strength of your body by the amount of sugar in the solution.
For each of the other problems, I use water and sugar, and the results vary from solution to solution. I am not sure if the effects would be identical at the same time. However, in most cases when the sugar concentration is so low and most of the sugar is used it is possible to reach a stable range of the results for many, many days without problem. It is not a matter how much alcohol you consume, and a few people experience shortness of breath during the treatment. If drinking alcohol will get you on the low end or get you in an accident (especially if you have children), this is not too bad. The fact that only 50% of sugar or no sugar have been absorbed correctly is very important as it determines if the outcome is the same as your original experience. If you are drinking too much then the effect on your stamina has already been realized, and there is no reason to not take the sugar a little sooner. Since sugar is an extremely sweet substance, it is impossible to be confident about its health. After all, even the best of sugar will contain all the harmful constituents. If you consider how many of the beneficial properties it contains, you will find that every drink would be beneficial to you. If you have had successful treatment for a potato disease that had a great effect on your life (i.e. lost weight or gained stamina) you may consider switching into a different lifestyle. Some of your friends are still recovering at the same point you were in the