Examples of contractile vacuole in the following topics:
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- Contractile vacuoles absorb excess water and wastes from a microorganism's cell and excrete them into the environment by contracting.
- A contractile vacuole (CV) is an organelle, or sub-cellular structure, that is involved in osmoregulation and waste removal .
- Previously, a CV was known as a pulsatile or pulsating vacuole.
- In some unicellular eukaryotic organisms (e.g., amoeba), cellular wastes, such as ammonia and excess water, are excreted by exocytosis as the contractile vacuoles merge with the cell membrane, expelling wastes into the environment.
- Structure of Euglena: 1 - Flagellum; 2 - Eye spot / Pigment spot / Stigma; 3 - Photoreceptor; 4 - Short second flagellum; 5 - Reservoir; 6 - Basal body; 7 - Contractile vacuole; 8 - Paramylon granule; 9 - Chloroplasts; 10 - Nucleus; 11 - Nucleolus; 12 - Pellicle
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- For example, paramecia and amoebas, which are protists that lack cell walls, have contractile vacuoles.
- A paramecium's contractile vacuole, here visualized using bright field light microscopy at 480x magnification, continuously pumps water out of the organism's body to keep it from bursting in a hypotonic medium.
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- Vesicles and vacuoles are membrane-bound sacs that function in storage and transport.
- Vacuoles are an essential component of plant cells.
- As the central vacuole shrinks, it leaves the cell wall unsupported.
- The central vacuole also supports the expansion of the cell.
- Contractile vacuoles are found in certain protists, especially those in Phylum Ciliophora.
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- The apicomplexan protists are so named because their microtubules, fibrin, and vacuoles are asymmetrically distributed at one end of the cell in a structure called an apical complex .
- Food captured in the oral groove enters a food vacuole where it combines with digestive enzymes.
- In addition to a vacuole-based digestive system, Paramecium also uses contractile vacuoles: osmoregulatory vesicles that fill with water as it enters the cell by osmosis and then contract to squeeze water from the cell.
- Contractile vacuoles allow the organism to excrete excess water.
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- Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
- In plant cells, the digestive processes take place in vacuoles.
- The central vacuole plays a key role in regulating the cell's concentration of water in changing environmental conditions.
- As the central vacuole shrinks, it leaves the cell wall unsupported.
- The central vacuole also supports the expansion of the cell.
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- Vesicles and vacuoles are membrane-bound sacs that function in storage and transport.
- Other than the fact that vacuoles are somewhat larger than vesicles, there is a very subtle distinction between them: the membranes of vesicles can fuse with either the plasma membrane or other membrane systems within the cell.
- In addition, plant cells have a cell wall, a large central vacuole, chloroplasts, and other specialized plastids, whereas animal cells do not.
- The cell wall protects the cell, provides structural support, and gives shape to the cell while the central vacuole plays a key role in regulating the cell's concentration of water in changing environmental conditions.
- Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.
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- These proteins are organized into regions
termed sarcomeres, the functional contractile region of the myocyte.
- The sarcomere is the functional contractile region of the myocyte, and defines the region of interaction between a set of thick and thin filaments.
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- The cavities in the plasma membrane that form the vacuoles have membrane receptors and lipid rafts in addition to caveolin.
- The vacuoles or vesicles formed in caveolae (singular caveola) are smaller than those in pinocytosis.
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- The outer membrane surrounding the plastid is thought have derived from the vacuole in the host, while the inner membrane is thought to have derived from the plasma membrane of the endosymbiont.
- The plastids of chlorarachniophytes are surrounded by four membranes: the first two correspond to the inner and outer membranes of the photosynthetic cyanobacterium, the third corresponds to the green alga, and the fourth corresponds to the vacuole that surrounded the green alga when it was engulfed by the chlorarachniophyte ancestor.