Introduction
All cells contain membranes that are selectively permeable, allowing certain things to pass into and leave out of the cell. Osmosis is the process in which water crosses membranes from regions of high water concentration to areas with low water concentration. When the concentration of the environment outside of the cell is lower than the inside of the cell, this is called a hypotonic solution. In hypotonic solutions, when water moves into the cell they burst, which is known as lysis. A hypertonic solution is when the concentration of outside the cell is higher than the inside of the cell. In hypertonic solutions, water moves out of the cell, making the cell lose water and shrink; this is called crenation. An isotonic solution is
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Absorption of water by alimentary canal.
3. Re-absorption of water by tubules of the nephron in kidneys.
• The Pro’s and cons of [reverse] Osmosis:
[http://blog.watertech.com/reverse-osmosis-advantages-and-disadvantages/]
[https://waterfilterhub.com/pros-and-cons-of-reverse-osmosis/]
The advantage is mostly that they remove many harmful contaminants from the water completely or greatly reduce their number, whereas the disadvantage is that the better ones tend to be quite expensive.
• Importance of Osmosis in the industry:
Water covers 70% of the Earth’s surface and is salt water, therefore not edible.
Reverse osmosis is the process of desalination by forcing water through a semi-permeable membrane.
Most of the dissolved salts, minerals and bacteria are trapped in the semi-permeable membrane while the water molecules are allowed to pass through, making the water edible.
Applying reverse osmosis in areas where water is either unavailable or scarce could mean the difference in millions of people dying of thirst or lack of fresh water for drinking, sanitation and other vital human needs.
Reverse osmosis is used in many countries, on a large scale as well as in private homes. This process removes various undesirable elements from the water, including iron, sodium, sulphate, potassium and