Table of Contents
What does the contractile vacuole contain?
contractile vacuole, regulatory organelle, usually spherical, found in freshwater protozoa and lower metazoans, such as sponges and hydras, that collects excess fluid from the protoplasm and periodically empties it into the surrounding medium. It may also excrete nitrogenous wastes.
What does the contractile vacuole store?
A contractile vacuole is a sub-cellular structure involved in osmoregulation. It pumps excess water out of a cell and is found prominently in freshwater protists. Basically, the contractile vacuole stores extra water. If the cell has a need for water, the contractile vacuole can release more water into the cell.
What is a contractile vacuole do?
: a vacuole in a unicellular organism that contracts regularly to discharge fluid and especially water from the cell.
What does the vacuole hold in a cell?
Vacuoles are storage bubbles found in cells. They are found in both animal and plant cells but are much larger in plant cells. Vacuoles might store food or any variety of nutrients a cell might need to survive. They can even store waste products so the rest of the cell is protected from contamination.
What is the main function of contractile vacuoles in protozoa?
The function of contractile vacuole is osmoregulatory. Water in freshwater protozoa enters the organism by endosmosis and during feeding. If the organism does not possess a mechanism to get rid of this excess water, it will swell to the point of rupture and dissolution.
What is the function of a contractile vacuole Why do some protists need these?
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 the function of the contractile vacuole quizlet?
Contractile vacuoles are membrane-bound organelles that exist mainly in the cells of the kingdom Protista. The point of the contractile vacuole is to pump water out of the cell through a process called osmoregulation, the regulation of osmotic pressure.
What is the vacuole explain?
A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance. Sometimes a single vacuole can take up most of the interior space of the plant cell.
What is the function of the contractile vacuole in paramecium?
Contractile vacuoles are responsible for osmoregulation, or the discharge of excess water from the cell, according to the authors of “Advanced Biology, 1st Ed.” (Nelson, 2000). Depending on the species, water is fed into the contractile vacuoles via canals, or by smaller water-carrying vacuoles.
What is the role of the contractile vacuole in a protist quizlet?