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Are you studying biology as a GCSE or A level subject via the awarding body Oxford, Cambridge and RSA OCR in the UK? Are you too aiming to get a distinction in your OCR A-level Biology osmosis? Do you too often get confused while interpreting what water potential and its gradient is? We understand that there can be several factors hindering you from performing your best, including your incomprehension of the subject matter and simply the lack of interest in this topic.
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One such task of practical biology osmosis that our biology writers helped a scholar with is attached as follows:. Osmosis is osmosis coursework help movement of water molecules into and out of the cells, down the water potential gradient Ψ. Osmosis is a vital process because almost all the cells use water to carry out the chemical processes needed for our survival. The process of osmosis is similar to that of diffusion as in osmosis the water molecules move from the area of high water concentration having higher water potential to the area of low concentration having lower water potentialosmosis coursework help, via a partially osmosis coursework help or selectively permeable membrane is a passive process, i.
it requires no energy. Therefore, the movement of water molecules is highly dependent on how to dilute or concentrated the surrounding solution is. The solution is said to be more dilute if there are more water molecules than the solute molecules in it a high water concentrationand more concentrated if fewer water molecules are present in it a low water concentration.
Henceforward, following the occurrence of osmosis, cells become bigger or smaller. When the water comes in, the mass of the cell increases and the cell will swell up. As the cell loses water due to osmosis, it shrinks, and the mass decreases, osmosis coursework help. Our biology experts who provide help with OCR biology osmosis coursework to scholars like you often encounter assessment tasks from the mass change topic of osmosis. So, how do we calculate the percentage change in the mass?
To calculate the net percentage of mass change, osmosis coursework help, the following formula is used:.
Thus, if a group of cells weighed 6. Osmosis can be of two types, namely, osmosis coursework help, endosmosis and exosmosis based on the type of osmosis solutions. Endosmosis happens when a substance cell is kept in a hypotonic solution, i. having solvent or water concentration more than that of the cell, and the molecules of solvent move inside the cell, making it rigid.
Exosmosis, on the other hand, occurs when a substance is kept in a hypertonic osmosis coursework help, i. having solvent or water concentration lower than that of the cell, and the molecules of solvent move out from the cell to the hypertonic solution, making the cell flaccid.
There is a third type of osmosis solution also, namely, the isotonic solution, which has an identical solvent concentration as that inside the cell, keeping a cell in an isotonic solution thus, brings about no change in the shape or size of the cell.
Want to know an example of osmosis as a part of your mundane life? Well, doesn't the raisin gets all puffed up when kept in the water? Or don't your fingers get pruned when you stay in the bathtub for long? All these are real-life examples of osmosis. Surprisingly, the process of sweating occurring now and then on our bodies also makes use of osmosis, osmosis coursework help. Due to the difference in the composition of plant and animal cells, the effects of osmosis in animal cells and plant cells are also different.
Due to the presence of cell wall in plant cells, when a plant cell is placed in a hypotonic solution, it swells up only to a certain extent until the internal pressure of the cell becomes equal to the outside pressure. The cell becomes turgid, and no further intake of osmosis coursework help solvent occurs.
Since animal cells lack a cell wall, when these are kept in a hypotonic solution, they swell up and burst. On the other and, when plant cells are kept in a hypertonic solution, osmosis coursework help, the solvent water from their cytoplasm diffuses out, osmosis coursework help, and the cells become flaccid. The cytoplasm of the plant cells shrinks and are pulled away from the outer cell wall. Similarly, water moves out of the animal cells when they are kept in a hypertonic solution, making them shrunken.
That is why animal cells have to be always surrounded by an isotonic solution, which in human bodies is maintained by the kidneys. Well, because we will give you more than what you will ask for. We will even provide a Turnitin report for free. We follow 21 steps for the quality check of each assignment to ensure unsurpassable osmosis coursework help. So, place new orders and track old orders from anywhere and at any time.
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