17
Question
The external solution having more concentration than the cell sap is known as
The external solution having more concentration than the cell sap is known as
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Solution
The correct option is B Hypertonic solution
When cells are in isotonic solution, movement of water out of the cell is exactly balanced by movement of water into the cell. If concentrations of dissolved solutes are less outside the cell than inside, the concentration of water outside is correspondingly greater. When a cell is exposed to such hypotonic conditions, there is net water movement into the cell. Cells without walls will swell and may burst (lyse)
In hypertonic solutions, concentrations of dissolved solutes are greater outside the cell and so the concentration of water outside is correspondingly lower. As a result, water inside the cell will flow outwards to attain equilibrium, causing the cell to shrink. As cells lose water, they lose the ability to function or divide.
Thus, the correct answer is option (A).
When cells are in isotonic solution, movement of water out of the cell is exactly balanced by movement of water into the cell.
If concentrations of dissolved solutes are less outside the cell than inside, the concentration of water outside is correspondingly greater. When a cell is exposed to such hypotonic conditions, there is net water movement into the cell. Cells without walls will swell and may burst (lyse)
In hypertonic solutions, concentrations of dissolved solutes are greater outside the cell and so the concentration of water outside is correspondingly lower. As a result, water inside the cell will flow outwards to attain equilibrium, causing the cell to shrink. As cells lose water, they lose the ability to function or divide.
Thus, the correct answer is option (A).
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