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प्रश्न
Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.
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उत्तर
Osmotic pressure is maintained in blood to prevent dehydration leading to shrinkage of cells.
संबंधित प्रश्न
Give the appropriate biological or technical term for the following.
Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.
Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement a separating membrane, is called
(a) Mention whether the following statement is true (True) or false (False)
(b) Correct the false statement by altering the last word only.
A plant cell placed in hypotonic solution gets Plasmolysed.
Explain how soaked seeds swell up and burst their seed coats.
Explain why:
The leaves of wilted lettuce, if kept in cold water, become crisp.
Give at least three uses of water to green plants
What is the significance of diffusion?
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.
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:
Plasmolysis
