Exumbrellar neurons appear to run between batteries, suggesting a coordinating or modulating role in nematocyte
The nematocyst develops in a nematocyte
with a homogeneous nucleus.
discharge and "self-recognition" in Anthopleura elegantissima Brandt.
However, the correlation between larval behavior, development, and nematocyte
dynamics was not accurately described.
By the bilayer stage, however, a substantial fraction are differentiating, as measured in terms of the small interstitial cells, which are the dividing intermediates of the neuron and nematocyte
pathways (David and Gierer, 1974).
were studied among a limited number of species, they are found to be highly diverse.
This study bioassays the possible effects of three of these peptides (HYM 194, HYM 330 and HYM 346) on differentiation of specific cell types, nerve cells and nematocytes
, in Hydra vulgaris and Hydra magnipapillata.
The stained cells were distinct from nematocytes
, which were unstained.
Cnidocil apparatus: sensory receptor of Physalia nematocytes
Biochemical studies have also indicated the presence of a receptor in membrane fractions of hydra that binds to the NMDA channel blocker, MK-801 (Pierobon et al., 2004a), and immunocytochemical studies provided evidence that NMDA receptors exist on the surface of nerve cells, nematocytes
, myonemes of epitheliomuscular cells, and interstitial stem cells (Scappaticci et al., 2004).
The discharge mechanism of acontial nematocytes
involves the release of nitric oxide.
In agonistic interactions, existing stolons swell due to the recruitment of nematocytes
(cells bearing the nematocysts) and discharge of nematocysts (highly specialized stinging organelles) (Buss et al., 1984).