microvilli


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microvilli

Microscopic hairlike projections above the surface of specialised epithelial cells, which are composed of complex plasma membrane folds surrounding an actin microfilament core. Microvilli greatly increase total cell surface, and therefore also the absorptive capacity of cell.

microvilli

The millions of tiny, hair-fine, finger-like protrusions on the surface cells of EPITHELIUM which greatly increase the effective surface area so as to facilitate absorption. Microvilli occur especially on the secretory and absorptive surfaces, and are formed by extensions of the cell membrane. They have a central core of actin filaments bound together with the protein VILLIN.
References in periodicals archive ?
(A) The model group with microvilli sloughing and mitochondria stretching, marked with 1 and 2 respectively; (B) Blank group with normal goblet cells and intestinal villi, marked with 3 and 4 respectively; (C) Positive drug group with microvilli shortening and membrane of goblet cells damaged, marked with 5 and 6 respectively; D and E were for CK group and TP group with integral microvilli, marked with 7 and 8, normal cell-cell junction and nuclear membrane, marked with 9 and 10, respectively.
Electron microscopic finding of degenerated cells in lumen of PCT and abnormal arrangement of microvilli in aged rats showed improvement after green tea administration.
this is particularly relevant for our intestinal villi and microvilli,
Biologists, clinicians, and other researchers from the US, Asia, and Europe address the basic molecular mechanisms of cell polarity, such as the roles of membrane lipids and proteins involved in membrane trafficking, including the exocyst and molecular trafficking machinery; specific modifications of the cell surface, such as cilia and microvilli, as well as laminins; the membrane trafficking of the transporters involved; and how epithelial cells are a barrier to interaction with the microbiome.
Visualization of mucosal layer of intestinal tract with SEM under higher magnification revealed that the microvilli were densely arranged on the surface of mucosal membrane of anterior intestine and abundant secretory gland cells were be mingled with columnar cells.
Like sabellids (Lawrence and Krasne, 1965; Ermak and Eakin, 1976), the cerebral ocellar photoreceptors of serpulids are rhabdomeric in nature, with the elaborated photoreceptive membranes being formed from microvilli that project into a pigment cup (Figs.
Acute exposures did not have much effect, but chronic exposure diminished the absorptive projections on the surface of intestinal cells called microvilli, showed the findings published in the journal NanoImpact.
The liver cells in turn are covered with microvilli - fingerlike protrusions that "massively enlarge" the cell surface area in contact with blood, said Dr Markus Heim, a liver researcher at the University of Basel.
In nasal septa that were only exposed to P multocida for two hours, the bacteria adhered to the microvilli and cilia of the corresponding cells.
SEM micrograph (Figure 1(b)) of the nontreated cells revealed a semi-flattened surface structure containing microvilli with extending lamellipodia known as membrane ruffles.