(n.) A serpent or monster in the lake or marsh of Lerna, in the Peloponnesus, represented as having many heads, one of which, when cut off, was immediately succeeded by two others, unless the wound was cauterized. It was slain by Hercules. Hence, a terrible monster.
(n.) Hence: A multifarious evil, or an evil having many sources; not to be overcome by a single effort.
(n.) Any small fresh-water hydroid of the genus Hydra, usually found attached to sticks, stones, etc., by a basal sucker.
(n.) A southern constellation of great length lying southerly from Cancer, Leo, and Virgo.
Example Sentences:
(1) As an extension of the previous study which indicated that mesoglea is a primitive basement membrane which has retained some characteristics of interstitial extracellular matrix, the present study was undertaken to analyze the role of mesoglea components during head regeneration in Hydra vulgaris.
(2) Using serial-sectioning techniques for conventional transmission and high-voltage electron microscopy, we characterized the ultrastructural features and synaptic contacts of the sensory cell in tentacles of Hydra.
(3) The neuron differentiation pathway in hydra is usually assumed to be the following.
(4) The extent of the growth changes in maximal work output during 10 s (MWO10), 30 s (MWO30), and 90 s (MWO90) of maximal repetitive knee flexions and extensions assessed on a modified Hydra-Gym machine was investigated in 84 boys and 83 girls, 9-19 yr of age.
(5) Substance P-like immunoreactivity was found in Hydra attenuata mainly but not exclusively in the nerve and interstitial cells, localized in the cytoplasm and on the cell surface membranes.
(6) Hydrozoans such as Hydra vulgaris, as with all classes of Cnidaria, are characterized by having their body wall organized as an epithelial bilayer with an intervening acellular layer termed the mesoglea.
(7) These results are the first demonstration that the dense-cored vesicles of Hydra neurons contain a neuropeptide.
(8) Nematocyte differentiation from interstitial stem cells in hydra occurs in a highly position-dependent manner along the body axis.
(9) The presence of Arg-Phe-amide (RFamide)-like peptides in dense-cored vesicles in neurons of the peduncle of Hydra was demonstrated by immunogold electron microscopy.
(10) History will judge Syria’s descent into a hydra-headed war as a stain on the world’s conscience.
(11) The multiple manifestations of systemic lupus erythematosus recall the ancient Greek monster the Hydra.
(12) Hydra) has raised some interesting evolutionary questions as to the function of intragranular nucleotides.
(13) Captain America kicking open the door of what looks like a European mountain fortress suggests the Nazi offshoot Hydra might be rearing its many ugly heads once again.
(14) Intact hydra treated for 24 h with oligomycin gradually lose their head structures and the distal ends form feet.
(15) This substance is specific for the foot as evidenced by the following findings: (1) It is present in the animal as a steep gradient descending from foot to head, paralleling the foot-forming potential of the tissue (2) It does not accelerate head regeneration, nor do the head factors of hydra discovered by Schaller (1973) and Berking (1977) accelerate foot regeneration.
(16) This study concerns application of the Hydra attenuata assay to detect the developmental toxicity potential of various aqueous samples.
(17) Feeding behavior in hydra is initiated by the association of glutathione (GSH) with a putative external chemoreceptor.
(18) Because it is self-inflicted, hydra-headed and increasingly beyond our control, both politically and economically, at a time when Britain is losing friends fast by peeing on their chips.
(19) The tentacles in hydra have characteristics of both spacing patterns and number-regulating patterns in that their number under some circumstances changes with the size of the animal and under others does not.
(20) Every epithelial cell is continuously displaced with neurons toward either head or foot in an adult hydra.
Tentacle
Definition:
(n.) A more or less elongated process or organ, simple or branched, proceeding from the head or cephalic region of invertebrate animals, being either an organ of sense, prehension, or motion.
Example Sentences:
(1) Using serial-sectioning techniques for conventional transmission and high-voltage electron microscopy, we characterized the ultrastructural features and synaptic contacts of the sensory cell in tentacles of Hydra.
(2) Microtubules at the tip of a resting (non-feeding) tentacle are arranged helically in two concentric tube-shaped arrays.
(3) The sensory cells of the mantle tentacles are found to be ciliated, primary receptors with subepithelial nuclei.
(4) In studies involving nearly intact animal preparations, neurons were identified which control specific movements of the dorsal cerata, the oral veil tentacles, and the margins of the foot.
(5) Freed of the need to wave their tentacles around to hunt for food, the coral can devote more energy to secreting the mineral calcium carbonate, from which they form a stony exoskeleton.
(6) She said the tentacles, or oral arms, were about a metre long and covered in microscopic mouths.
(7) Each tentacle is reinforced by eight pairs of fibrils arranged concentrically just within its wall, and contains a single missile-like body (MLB).
(8) We decided to test Chrysaora hysoscella dermotoxicity on healthy volunteers by cutting a Chrysaora hysoscella tentacle and placing it on a gauze soaked in a solution of 3% NaCl and applying then to the volar side of the right wrist for one minute.
(9) The prime minister said waves of immigration had helped Australia flourish, “yet the tentacles of the death cult have extended even here as we discovered to our cost during the Martin Place siege last December”.
(10) The tentacles of the terrestrial snail Achatina fulica contain an epithelium at their tips which is specialized for olfaction.
(11) Contact with the tentacles of the jellyfish had produced characteristic whiplash-like weals on the skin.
(12) The tentacles in hydra have characteristics of both spacing patterns and number-regulating patterns in that their number under some circumstances changes with the size of the animal and under others does not.
(13) The chemoreceptors of the optic tentacle bulb, small and large neurons of tentacle ganglion and bipolar cells of olfactory nerve send their processes to the CNS of the mollusc.
(14) Through dexterous operation of the Shinkai6500's mechanical arms by pilot Sasaki-san, we quickly began collecting samples of rocks, the hot fluids from the vents, and the creatures thriving around them: speckled anemones with almost-translucent tentacles, and the orange-tinted shrimp scurrying among them.
(15) The role of micro-filaments and halothane-resistant dynein-like inter-row bridges in tentacle movement is discussed.
(16) Here lies our greatest risk, one insufficiently appreciated by those who so blithely accept the tentacles of corporation, press and state insinuating their way into the private sphere.
(17) Similarly, following decapitation as a new head regenerates, CP8 label appears covering a domed area at the apical end of the regenerate before tentacles evaginate delineating the head.
(18) Particularly, the proteinic fractions 7 and 8 are more concentrated in the extract of juveniles snails tentacles than in the extract of adults snails.
(19) Ninety-seven per cent of all nematocytes, including all 4 types, are mounted in the battery cells of the tentacles.
(20) The tentacles become attached to the cilia of the host, and serve for feeding upon the plasmatic contents of the cilia as well as for maintaining contact with the host.