The distinctive pattern of expression of [beta]80868 by large cells in the epidermis in the oral region and in large cells scattered throughout the mesenteries does not correspond to any particular class of neuron or
cnidocyte, nor to any particular kind of mini-collagen, the intracellular matrix that reinforces the walls of the cnidocyst (Marlow et al., 2009; Zenkert et al., 2011).
"We were also able to demonstrate that
cnidocyte firing itself is effected by the light environment and that these effects are reversed when components of the phototransduction cascade are turned off," Dr Plachetzki added.
Neural control of
cnidocyte discharge is also present in a more global context inasmuch as the threshold for discharge is greatly elevated in Hydra fed to repletion (Smith et al., 1974; Thurm et al., 1998b), a response that is absent in nerve-free Hydra.
Sensory supporting cells within the tentacle epidermis surround each
cnidocyte (Watson and Hessinger, 1988; Hessinger and Ford, 1988).
Cnidocyte mechanoreceptors are tuned to the movements of swimming prey by chemoreceptors.
The cnidarian
cnidocyte, a high-tech cellular weaponry.
In anemone tentacles, each
cnidocyte is surrounded by two or more supporting cells.
These mechanisms control the discharge of cnidae through the interplay of both local receptors associated with the
cnidocytes that trigger discharge (Watson and Hessinger, 1988, 1991) and remote receptors that modulate
cnidocyte responsiveness (as reviewed in Thorington and Hessinger, 1988b).
Some of the jellyfish's skin cells are stinging cells called
cnidocytes. These specialized cells have special parts called nematocysts that contain venom.
Jellyfish sting using nematocysts, which are located in special cells called
cnidocytes on the tentacles.
One explanation for this pattern involves
cnidocytes. Neverita duplicata must manipulate the bivalve into the appropriate position for drilling, which may take several hours or days to complete.
Known only by its species name, Chrysaora achlyos (kris-AH-oh-rah ACK-lee-us), the creature sported 9-meter (30-foot)-long tentacles riddled with stinging cells called
cnidocytes (NYE-doh-sites).