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प्रश्न
Explain the term:
Diffusion
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उत्तर
- Diffusion means to disperse.
- Diffusion can be defined as the movement of ions/ atoms/ molecules of a substance from the region of their higher concentration to the region of their lower concentration till equilibrium is reached.
- The movement is due to the kinetic energy of the molecules.
- Water passes into the cell by diffusion through a freely permeable cell wall.
संबंधित प्रश्न
Differentiate between Turgor pressure and Wall pressure (explain)
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Define the following:
Osmosis
Define the following:
Hypertonic solution
Explain why:
The leaves of wilted lettuce, if kept in cold water, become crisp.
Choose the correct answer:
Osmosis involves diffusion of ___________
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The apparatus arranged here signifies an important process.
(i) Name the process.
(ii) Where does this process occur in plants?
(iii) What solution is placed inside the dialysis tubing?
(iv) What happens to the level of the solution in the capillary tube?
(v) Define the process mentioned in Q. (i) above.
The beaker is divided into two chambers A and B. The big circle represents solute and the small circles solvent.
(i) What can you say about the size of the holes in the membrane, if it is to behave semi- permeably between these two?
(ii) Will the solvent molecules pass through the membrane from left to right, from right to left, in either direction or in both directions?
(iii) In which direction will there be a net movement of solvent molecules?
Name the following:
The pressure through which water can rise upto some feet.
Fill in the Blank
When there is no movement of water in the cell from the outside medium, the medium is considered to be ______ to cell sap.
Fill in the Blanks
Osmosis in the diffusion of _______ molecules from the region of higher _____ potential to that of lower potential across a S.P.M.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The plasma membrane permits the passage of all solutes and water.
Explain the Term:
Osmosis
When a cell in solution shrinks and loses its shape, then the solution is ______.
