What is contractile vacuole and its 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.

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.

Where are the contractile vacuole located in amoeba?

posterior part
Hint: In Amoeba, the contractile vacuole is present in the posterior part of the amoeba at the end which helps in dragging the organism or moving the organism. This vacuole is filled with water.

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 main function of contractile vacuole 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 purpose of the contractile vacuole found in some protozoans?

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 is the function of vacuole in amoeba?

In Amoeba contractile vacuoles collect excretory waste, such as ammonia, from the intracellular fluid by both diffusion and active transport.

What are the functions of food vacuoles and contractile vacuoles as observed in paramecium?

The food vacuoles are involved in the digestion of food along with lysosomes. Contractile vacuoles are mainly involved in maintaining the water content in the cell thereby ensuring that the osmotic pressure is balanced within the cell.

What is the main function of contractile vacuoles in protozoa?

What is the function of the water vacuole in the paramecium?

Osmoregulation. Paramecium and amoeba live in fresh water. Their cytoplasm contains a greater concentration of solutes than their surroundings and so they absorb water by osmosis. The excess water is collected into a contractile vacuole which swells and finally expels water through an opening in the cell membrane.

Where are lysosomes located?

animal cells
Lysosomes are found in all animal cells, but are rarely found within plant cells due to the tough cell wall surrounding a plant cell that keeps out foreign substances.

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