What is contractile vacuole give example?

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. Some species, like giant amoeba, have numerous contractile vacuoles.

What is the function of the contractile vacuole in an amoeba?

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 an example of a vacuole?

Examples include the lytic vacuole, the storage vacuole and the lutoid. One important function of plant vacuoles is the maintenance of hydrostatic pressure. Other eukaryotes employ vacuoles for a variety of purposes, including storage (as in the yeast lysosome/vacuole), secretion and phagocytosis.

What is the function of a contractile vacuole in some single celled organisms?

Contractile vacuoles protect a cell from absorbing too much water and potentially exploding by excreting excess water. Wastes, such as ammonia, are soluble in water; they are excreted from the cell along with excess water by the contractile vacuoles.

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 the contractile vacuole in the 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 function of vacuole in amoeba class 9?

It is a regulatory organelle, spherical in shape, found in lower organisms’ cells, including protozoa. The functions of contractile vacuoles in amoeba are: Helps in the excretion process. Maintains the osmotic balance.

What are the function of vacuoles?

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 are the main functions of vacuoles?

Aside from storage, the main role of the central vacuole is to maintain turgor pressure against the cell wall. Proteins found in the tonoplast (aquaporins) control the flow of water into and out of the vacuole through active transport, pumping potassium (K+) ions into and out of the vacuolar interior.

What is the significance of vacuole in plant cell and contractile vacuole in amoeba?

Amoeba need contractile vacuoles for osmoregulation. It prevents the cell from retaining excess water. If the cell absorbs too much water, it can lead to cell rupture. So contractile vacuole helps in expelling excess water in the unicellular organisms.

What is the function of contractile vacuole in euglena?

Toward the posterior of the cell is a star-like structure, the contractile vacuole. This organelle helps the cell remove excess water, and without it the euglena could take in some much water due to osmosis that the cell would explode or lyse.

How do contractile vacuoles help amoebas maintain homeostasis?

The contractile vacuole functions by removing excess water or liquid, therefore, the answer for this question would be option B. The contractile vacuole in a single-celled organism functions to maintain homeostasis by pumping water out of the cell. Hope this answer helps.

What is the function of food vacuole in amoeba?

Food vacuoles of amoeba are fluid filled membrane bound structures present inside the cytoplasm of the cell. Amoeba grabs the food particle by the help of pseudopodia and takes it inside the food vacuole. The fluid inside vacuole contains several enzymes that digest the food and digested parts are absorbed into the cytoplasm.

Which cell has a contractile vacuole plant or animal?

A contractile vacuole ( CV) is a sub-cellular structure ( organelle) involved in osmoregulation. It is found predominantly in protists and in unicellular algae. It was previously known as pulsatile or pulsating vacuole. The contractile vacuole is a specialized type of vacuole that regulates the quantity of water inside a cell.

What does the contractile vacuole in a Paramecium do and why?

The contractile vacuole acts to pump out excess water from the cell. Paramecium live in freshwater, the water outside has lower solute concentration than that of the cytoplasm, thus due to osmosis, the water will flow into the cell. This excess water can be gathered at the contractile vacuole and then be expelled out.

https://www.youtube.com/watch?v=yB-BgBpx6cc