The Contractile Vacuole of a Paramecium Should Be Active When the Paramecium Is in

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Paramecium is a single-celled organism that belongs to the protist kingdom. It is characterized by its cilia that cover its body, allowing it to move and capture food. One of the essential organelles in the paramecium is the contractile vacuole, which plays a vital role in maintaining the organism`s internal environment.

The contractile vacuole is a structure that collects excess water and waste materials from the cytoplasm and expels them out of the cell. It acts as a pump, contracting and expanding to move water and waste material to the cell membrane, where it is released into the surrounding environment.

The importance of the contractile vacuole is even more significant for paramecium, which are aquatic organisms living in freshwater. As a result, they constantly face the risk of water intake that can lead to an imbalance in the internal environment, resulting in the bursting of the cell membrane. Hence, the contractile vacuole is crucial in maintaining the paramecium`s osmotic balance, preventing it from absorbing too much water and ensuring that waste materials are expelled out of the cell promptly.

However, the contractile vacuole of a paramecium should only be active when the organism is in a hypotonic environment. In such an environment, the concentration of solutes outside the cell is lower than inside the cell. As a result, water moves into the cell, and the contractile vacuole needs to be active to prevent the cell from swelling and bursting.

In contrast, when a paramecium is in an isotonic environment, where the concentration of solutes is the same inside and outside the cell, the contractile vacuole is inactive. There is no risk of water intake, and the paramecium does not require the contractile vacuole to expel water out of the cell.

In conclusion, the contractile vacuole is a vital organelle in paramecium, ensuring that the organism`s internal environment is maintained by expelling excess water and waste materials. It should only be active when the paramecium is in a hypotonic environment, where the risk of water intake is high. By understanding the function and importance of the contractile vacuole, we can gain valuable insights into the behavior and survival mechanisms of these fascinating organisms.