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प्रश्न
Differentiate between Diffusion and Osmosis (Definition)
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उत्तर
Diffusion and Osmosis (Definition):
| Diffusion | Osmosis |
| Diffusion is the free movement of molecules of a substance from the region of its higher concentration to the region of its lower concentration when the two substances are in direct contact. | Osmosis is the diffusion of water molecules across a semi-permeable membrane from a more dilute solution (with a lower solute concentration) to a less dilute solution (with a higher solute concentration). |
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संबंधित प्रश्न
Name the following:
Condition of cell in which the cell contents are shrunken.
Name the following:
The inward movement of solvent molecules through the plasma membrane of the cell.
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Name and define the physical process being investigated in this experiment.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
Comment on the nature (tonicity) of the liquid surrounding the cell.
Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.
Give Reasons for the following.
The raisins swell up in the water.
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
Multiple Choice Question:
In the process of osmosis in a cell:
