(n.) Any protoplasmic filament or irregular process projecting from any unicellular organism, or from any animal or plant call.
(n.) A rhizopod.
Example Sentences:
(1) Under conditions of chemotaxis with activated serum beneath the filter, the neutrophil population oriented at the filter surface with nuclei located away from the stimulus, centrioles and associated radial array of microtubules beneath the nuclei, and microfilament-rich pseudopods penetrating the filter pores.
(2) In the latter case, the movement of lectin-receptor complexes occurs from membrane overlying peripheral microtubules into filament-rich pseudopods that exclude microtubules.
(3) The morphology of human leukocytes, the biochemistry of actin polymerization, and the theory of continuum mechanics are used to model the pseudopod protrusion process of leukocytes.
(4) In an activated serum gradient, colchicines, but not lumicolchicine, decreased the orientation of nuclei and centrioles, and caused a decrease in centriole-associated microtubules in concentrations as low as 10(-8) to 10(-7) M. These colchicines effects were associated with the rounding of cells and impairment of pseudopod formation.
(5) In the electron microscope administration of TSH was seen to induce well-known signs of endocytosis, such as formation of pseudopods and colloid droplets.
(6) In addition, some lymphocytes with pseudopods were detected both in alveolar lumen and in the interstitium.
(7) Sections at this region of high membrane turnover reveal a band of densely packed smooth vesicles with round and tubular profiles, some of which are associated with the pseudopod plasma membrane.
(8) The F-actin assembled by 60 sec is localized in these new pseudopods.
(9) The presence of the multivesicular body in the pseudopod or in the vicinity of the pseudopod of the lymphocyte may contribute to the migration.
(10) The ultrastructural studies suggest that the major Tg-induced changes (pseudopod formation and granule centralization) are consistent with a primary role for Tg to mobilize calcium; DPPE had very little effect on these ultrastructural changes.
(11) The secretion of thyroid hormones under the influence of pituitary thyrotrophin (TSH) from stores in the luminal colloid is initiated by elongation of microvilli and formation of pseudopods.
(12) The second stage of actin assembly, which peaks at 60 sec following an upshift in cAMP concentration, is temporally correlated with the growth of new pseudopods.
(13) (8) The development of platelet constriction, platelet pseudopods and the intracellular microfilaments are delayed in colchicinized clots, corresponding to the retardation of retraction.
(14) Bound CGP-ABY was cleared first from the tips of the projections and subsequently from the entire pseudopod surface.
(15) The actin-binding protein ABP-120 has been proposed to play a role in cross-linking F-actin filaments during pseudopod formation in motile Dictyostelium amebas.
(16) The formation of pseudopods is impaired and no microtubules are found in platelets in the presence of colchicine.
(17) When motility was compared between sublines, membrane ruffling and cellular translation were relatively unaffected by substrate, whereas pseudopodal extension was altered significantly by different substrates.
(18) After correcting for effects of pseudopods and platelet size on platelet diffusion and sedimentation, it still appeared that the small number of long pseudopods formed on human platelets could largely explain the unusually large alpha B values.
(19) No such changes were observed in non-sensitized M. In contrast, when immunosuppressants or immunomodulators were used, increases of pseudopod movement and pinocytosis, and excitation of cytoplasmic movement, were observed in both sensitized and non-sensitized M if compounds were cytotoxic.
(20) From the enlarged apical plasma membrane, pseudopods are formed.
Pseudopodium
Definition:
(n.) Same as Pseudopod.
Example Sentences:
(1) Both signals may be part of a normal pseudopodium autoactivation and inhibition system responsible for amoeboid morphology and motility.
(2) 3) The tip of the pseudopodium swelled and the main body of the PGC flowed into the swelling portion, leaving a slender cytoplasmic tail.
(3) Structural differences between frontal caps, depending on the degree of their development, indicate that the growing cap gradually fills up the whole tip of an advancing pseudopodium, and at the front it reduces the cortical layer in the interstice between the MLE and the outer cell membrane, up to its eventual disrupture.
(4) The contracting fibers, attached at the tip and running continuously back toward the amoeba cell body, pull the fluid constituent of the cytoplasm forward and ultimately crosslink to form the outer gel tube of the advancing pseudopodium.
(5) Mammalian-cell damage occurred only when the organisms recovered pseudopodium function and began to migrate over the monolayers as they overcame the inhibitory effects of the antiserum.
(6) Amoeboid movement of spheroid or ovoid immature or mature macrogamonts within cultured Madin-Darby bovine cells usually began with the formation of a pseudopodium-like protrusion at the margin of the gamont.
(7) Besides the epithelial cells, there were cells characterized by pseudopodium-like cytoplasmic projections, a few membranous structures, an irregular nucleus, and cytoplasm containing a few dense bodies, in the basal portions of the epithelial cells, or between the basal lamina and the epithelial cells.
(8) With the thin collagen layer as a substrate, the sequence of the PGC locomotion was as follows: 1) The PGC produced a small pseudopodium.
(9) The large amoeba-like bodies sometimes showed both outer and inner double-layered membranes, especially in pseudopodium-like cellular extensions.
(10) One of the most rapid of these responses is the polymerization of actin associated with the cytoskeleton, an event correlated with pseudopodium formation, which occurs within 3-5 s of chemotactic receptor stimulation.
(11) The surface of the cells often sends out pseudopodium-like processes.
(12) Thus, extension of a pseudopodium followed by nucleokinesis in the same direction and retraction of the cell body behind the nucleus is a normal motile sequence in translocating bipolar cells.
(13) Scanning electron microscopy revealed a striking decrease of pseudopodium formation in alpha-tocopherol-enriched platelets.
(14) A continuum theory is proposed for the chemically controlled cytoplasmic streaming observed in pseudopodium extension in Chaos Carolinensis.
(15) The locomotion of the PGC on the thick collagen layer as a three-dimensional substrate was as follows: 1) The PGC protruded a pseudopodium in the direction of the GR.
(16) A "trigger chemical", produced at the pseudopodium tip, moves by diffusion in, and convection by, the viscous fluid, and causes the contractile fibers to contract in their own length.
(17) Occasionally a pseudopodium was projected into the cytoplasm of disintegrated epithelial cells.
(18) The subsequent chain of signal transduction events brings about the polymerization of cytoskeletal actin (associated with pseudopodium formation) within five seconds and the formation of a peak of cyclic GMP within 10 s. Evidence from streamer F mutants indicates that the cyclic GMP regulates the association of myosin with the cytoskeleton that occurs at 25-50 s and that this phenomenon is concerned with elongation of the amoebae during chemotactic movement.
(19) The excess of hydrostatic pressure above ambient built up at the tip provides the force to roll out the advancing pseudopodium tip.
(20) According to this theory, in the region behind the advancing pseudopodium tip, the contractile fiber rods move forward toward the tip faster than the fluid constituent.