define Osmosis, hypotonic solution, isotonic solution,hypersonic solution
Answers
Hey!
Osmosis: The movement of water molecules from the region of high concentration to the region of low concentration through a selectively permeable membrane.
Hypotonic solution: It is a solution that has less solute and more water ( solvent ) than another solution.
Isotonic solution: It is solution that has equal concentration of solute outside the cell as well as inside the cell.
Hypertonic solution: It is a type of solution that has greater concentration of solute outside the cell than inside the cell.
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Answer :
Osmosis :
Water also follows the law of diffusion.
-The spontaneous movement of water molecules through a selerctive permeable membrane is called osmosis.
The movement of water across the plasma membrane of the cell is affected by amount of substance dissolved in water. Thus, osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.
Osmosis is purely a mechanical diffusion process by which cells absorb water without spending any amount of energy.
Hypotonic solutions :
If the medium surrounding the cell has a higher water concentration than the cell, and if the solution is very dilute solution, the cell will gain water by osmosis. Such a dilute solution is called Hypotonic solutions.
Isotonic Solutions :
If the medium surrounding the cell is of exactly the same water concentration as the cell, there will be no net movement of water across the plasma membrane. Such a solutions is called Isotonic solutions.
Hypertonic solutions :
If the medium has a lower concentration of water than the cell, and if it is very concentrated solution, the cell will lose water by osmosis. Such a concentrated solution is called Hypertonic solution.