cnidocyte


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Related to cnidocyte: Colloblast

cnidocyte

[′knīd·ə‚sīt]
(invertebrate zoology)
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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.
These light sensitive neurons are found integrated into arsenals that include the stinging cnidocytes as well as desmoneme cnidocytes, used to grasp prey, and sticky isorhiza, which help the hydra to summersault at 10cm a day.
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).
Cnidocytes synthesize and deploy eversible secretory products termed cnidae.
Cnidocytes and adjacent supporting cells form receptor-effector complexes in anemone tentacles.
The basal location of this plexus is best exemplified by Porpita, where the long cytoplasmic extension at the basal end of each cnidocyte creates a considerable separation between the cyst and the FMRFamide IR neurons.
In Bunodosoma and other anemone species, the ectoderm of the tentacles is filled, almost uniformly, with cnidocytes and, unlike the representatives of the other classes examined, there are no discontinuities in cnidocyte coverage that could be mapped to interruptions or breaks in the underlying peptidergic nerve net.
The nematocyst is a secretory product of the cnidocyte (Slautterback, 1961; Skaer, 1973).
Cnidae are the eversible secretory products of specialized cells called cnidocytes.
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).
More divisions result in more and smaller cnidocytes, which produce smaller cnidae (Lehn, 1951).