Search results
Results From The WOW.Com Content Network
In yeast cells the vacuole is a dynamic structure that can rapidly modify its morphology. They are involved in many processes including the homeostasis of cell pH and the concentration of ions, osmoregulation , storing amino acids and polyphosphate and degradative processes.
Instead, paraptosis displays a somewhat primitive cell death path, [5] comparable to necrosis, including characteristic cytoplasmic vacuole formation and late mitochondrial swelling [2] and clumping. [6] The number and size of vacuoles increases over time. Eventually, the vacuole sizes reach a point of no return and the cell cannot recover. [6]
Blastocystis hominis demonstrates tremendous morphological plasticity throughout its life cycle. [10] The vacuolar form, which is most usually seen in laboratory cultures, has a large central vacuole surrounded by peripheral cytoplasm containing the nucleus and other organelles. [11]
Vacuoles may form in neutrophils if a blood sample is left standing for several hours prior to blood smear preparation, but this is an artifactual change with no clinical significance. [4] Artifactual vacuoles are small and of uniform size and distribution, in contrast to toxic vacuoles whose size and placement are variable. [1]
Vacuoles: Vacuoles sequester waste products and in plant cells store water. They are often described as liquid filled spaces and are surrounded by a membrane. Some cells, most notably Amoeba, have contractile vacuoles, which can pump water out of the cell if there is too much water. The vacuoles of plant cells and fungal cells are usually ...
Gas vacuoles are membrane-bound, spindle-shaped vesicles, found in some planktonic bacteria and Cyanobacteria, that provides buoyancy to these cells by decreasing their overall cell density. Positive buoyancy is needed to keep the cells in the upper reaches of the water column, so that they can continue to perform photosynthesis.
The parasitophorous vacuole (PV) is a structure produced by apicomplexan parasites in the cells of its host. The PV allows the parasite to develop while protected from the phagolysosomes of the host cell.
The smallest known contractile vacuoles belong to Chlamydomonas, with a diameter of 1.5 μm. In Paramecium, which has one of the most complex contractile vacuoles, the vacuole is surrounded by several canals, which absorb water by osmosis from the cytoplasm. After the canals fill with water, the water is pumped into the vacuole.