cnidocyte


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Related to cnidocyte: Colloblast

cnidocyte

[′knīd·ə‚sīt]
(invertebrate zoology)
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References in periodicals archive ?
Hydra tentacles contain barbed, poison containing cnidocytes that they use to stun animals like the water flea, Daphnia, before eating them alive, and to protect themselves from attack by other animals.
Researchers from the University of California lead by Dr David Plachetzki have discovered that the light sensitive protein opsin found in sensory cells is able to regulate the firing of harpoon-like cnidocytes.
Here, the cellular location of Pp[Ca.sub.V][beta] was determined using standard immunolocalization techniques with both isolated cnidocytes and cnidocytes in situ to determine if it is involved in the exocytotic events that underlie cnidocyte discharge, synaptic transmission to elements of the animal's nervous system, or both.
Small aliquots of the cnidocyte suspension were placed directly onto gelatin-coated microscope slides or charged slides (Fisher Scientific).
Feeding tentacles are muscular appendages armed with stinging cells, called cnidocytes. The cnidocytes mediate the killing, capture, and transport of prey to the centrally located mouth.
Cnidocytes synthesize and deploy eversible secretory products termed cnidae.
The nematocyst is a secretory product of the cnidocyte (Slautterback, 1961; Skaer, 1973).
Cnidae are the eversible secretory products of specialized cells called cnidocytes. The three known classes of cnidae are nematocysts, spirocysts, and ptychocysts (Mariscal, 1974).
Three measures of cnidocyte responsiveness were used: (i) measurement of adhesive force; (ii) enumeration of discharged mastigophores by microscopic examination; and (iii) enumeration of discharged spirocysts by enzyme-linked lectin sorbent assay (ELLSA).
Afferent mechanisms of cnidae influence detection and selection of prey and regulate the selective discharge of cnidae under a hierarchy of interactions: (i) between prey and predator (Thorington and Hessinger, 1988b); (ii) between CSCCs of the same and different tentacles (Hessinger et al., 1992; Watson and Hessinger, 1994a); (iii) between remote sensory cells and the CSCCs (Mire-Thibodeaux and Watson, 1993); (iv) between the sensory supporting cells and the effector cnidocyte within the same CSCC (Watson and Hessinger, 1989); and (v) between chemo- and mechanoreceptor systems located on the same supporting cells (Watson and Hessinger, 1991).
More divisions result in more and smaller cnidocytes, which produce smaller cnidae (Lehn, 1951).
A variety of ultrastructural (for review, see Westfall, 2004) and histological (Anderson et al., 1992; Golz, 1994) studies have reported on the association between nerves and cnidocytes, and it is now clear that cnidocytes are innervated by both sensory neurons and interneurons (Westfall, 2004).