How does contractile vacuole control water balance?
Instead, these protists use a third strategy: they employ water pumps called contractile vacuoles (CVs) to remove excess water. CVs are specialized vacuoles that slowly accumulate water during diastole and periodically expel the liquid rapidly into the medium (systole) (1,–4).
How does the contractile vacuole help maintain osmotic balance?
The role of the contractile vacuole is to collect and pump excess water out of a cell (osmoregulation). The vacuole expands as it collects water and contracts to expel the water once it is full. The water also contains dissolved solutes that are often waste products.
Which best describes the job of the contractile vacuole in maintaining water balance?
A contractile vacuole collects excess water from the cell and pumps it out, keeping the cell from lysing as it takes on water from its hypotonic environment.
Does the contractile vacuole store water?
These organelles are seen in protists, plant cells, fungi, and some animal cells. However, contractile vacuoles should not be confused with the vacuoles that store food or water. Contractile vacuoles differ from other types of vacuoles because they can contract and expand to regulate the amount of water in the cell.
What do contractile vacuoles do?
The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
What causes the contractile vacuole to fill with water?
The contractile vacuole is a specialized type of vacuole that regulates the quantity of water inside a cell. In freshwater environments, the concentration of solutes is hypotonic, lesser outside than inside the cell. Under these conditions, osmosis causes water to accumulate in the cell from the external environment.
Which of the following is the main function of contractile vacuole?
osmoregulation The major function – of contractile vacuole is osmoregulation, i.e., removal of excess of water.
How does the contractile vacuole in a single celled organism function to maintain homeostasis?
How does the contractile vacuole in a single-celled organism function to maintain homeostasis? It pumps water out of the cell. Reptiles and birds excrete waste as an insoluble white solid that is called uric acid.
Which organisms normally use contractile vacuoles to help maintain water balance?
Examples. Examples of cells that contain this contractile vacuole are amoeba paramecium and some types of algae. Some sponges (including amoebocytes pinacocytes and choanocytes) singled-celled fungi and hydra also have contractile vacuoles.
How is the pumping action of contractile vacuoles an example of how a cell maintains homeostasis?
This is a way paramecia maintain homeostasis because osmosis can eventually cause them to absorb so much water that the cell may stop functioning or even burst. By pumping out the water, the paramecia can maintain the conditions to live a healthy life.
What is the function of the contractile vacuole?
The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
What is a contractile vacuole and how does it function?
The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
How does the contractile vacuole in a single celled organism function to maintain homeostasis it pumps water into the cell?
How does the contractile vacuole in a single-celled organism function to maintain homeostasis? It pumps water out of the cell. Reptiles and birds excrete waste as an insoluble white solid that is called uric acid.