Q. The external solution having more concentration than the cell sap is called
Solution:
The solution, in which a cell is placed, can be categorized into three main categories:
1. If the concentration of a given solute is higher in the solution, in which the cell is placed, as compared to cell sap, it is called a Hypertonic solution. The cell, when placed in this, tends to lose water and shrink (Plasmolysis occurs).
2. If the concentration of a given solute is lower in the solution, in which the cell is placed, as compared to cell sap, it is called a Hypotonic solution. The cell, when placed in this, tends to absorb water and swell (Deplasmolysis occurs).
3. If the concentration of a given solute is the same in the solution, in which the cell is placed, with the cell sap, it is called Isotonic solution. In this case, the rate of loss of water is exactly the same as that of absorption. Thus, there is no change in the shape of the cell. There is a dynamic equilibrium.
1. If the concentration of a given solute is higher in the solution, in which the cell is placed, as compared to cell sap, it is called a Hypertonic solution. The cell, when placed in this, tends to lose water and shrink (Plasmolysis occurs).
2. If the concentration of a given solute is lower in the solution, in which the cell is placed, as compared to cell sap, it is called a Hypotonic solution. The cell, when placed in this, tends to absorb water and swell (Deplasmolysis occurs).
3. If the concentration of a given solute is the same in the solution, in which the cell is placed, with the cell sap, it is called Isotonic solution. In this case, the rate of loss of water is exactly the same as that of absorption. Thus, there is no change in the shape of the cell. There is a dynamic equilibrium.