(a.) Destitute of a backbone; having no vertebrae; of or pertaining to the Invertebrata.
(n.) One of the Invertebrata.
Example Sentences:
(1) The results suggest that normal development of some invertebrate neural pathways may be more dependent on experience during ontogeny than has previously been assumed.
(2) This result is in contrast to most other animals (ranging from invertebrates to mammals), in which sperm are generally motile for at least several hours.
(3) This invertebrate precipitin, Tridacnin, may be used as a marker for nearly two thirds of all asialo serum glycoproteins; A number of different cross-reactions with various other polysaccharides and galactans subdivides those neuraminidase-treated glycoproteins into several subgroups, indicating that the uncovered carbohydrate structures are not always completely identical.
(4) We compared the molecular nature of the rat brain opiate receptor with that of the invertebrate leech, Haemopis marmorata, and the protozoan, Tetrahymena, in order to examine the issue of apparent receptor heterogeneity with respect to biochemical structure.
(5) The ruthenium red method was also used on a number of marine invertebrate embryos and larvae, representing different phyla, to facilitate comparisons between their surface coats.
(6) Using an SDS gel electrophoresis method, connectin, very high molecular weight (approximately 10(6) dalton) protein, was detected in an SDS extract of whole tissues of various types of muscles of vertebrates and invertebrates.
(7) Thirty-five antisera to 20 vertebrate regulatory peptides and 1 invertebrate peptide (FMRFamide) were used to screen the worm for neuropeptide IR.
(8) Purification procedures that appear to be generally applicable to invertebrate MTs have only recently been developed and are described here.
(9) The over-all response of duck erythrocytes is considered as an example of "isosmotic intracellular regulation," a term used to describe a form of volume regulation common to euryhaline invertebrates which is achieved by adjusting the number of effective intracellular osmotic particles.
(10) The body wall muscle and the blood vessel muscle are compared with other muscle types described in invertebrates.
(11) Although neither protein bound to heparin, gelatin, hexosamine, or uronic acid-Sepharose resins, their affinity for an invertebrate proteoglycan, their roles in sponge cell adhesion, and their peripheral membrane protein natures suggest that they may represent early invertebrate analogs of cell-associated vertebrate extracellular matrix adhesion proteins, such as fibronectin or vitronectin, or else an entirely novel set of cell adhesion molecules.
(12) In organisms as diverse as bacteria, plants, invertebrates, and vertebrates, synthesis of these proteins is directly correlated with the acquisition of thermotolerance.
(13) Invertebrate systems have proved to be quite useful for the development of an understanding of some processes in the central nervous system (CNS).
(14) The amino acid composition of the ABRM calmodulin closely resembled that of other invertebrate calmodulins.
(15) Current thinking on fixed behaviors in invertebrates holds that they are generated by specialized neural circuits in the brain.
(16) In view of reports that the nerve fibers of the sea prawn conduct impulses more rapidly than other invertebrate nerves and look like myelinated vertebrate nerves in the light microscope, prawn nerve fibers were studied with the electron microscope.
(17) To test the hypothesis that inositol trisphosphate (InsP3) mediates adaptation and excitation in invertebrate photoreceptors, we measured its formation on a rapid time scale in squid retinas.
(18) The cellular and circuit properties of individual identified neurons in invertebrates can be readily studied; hence it is possible to determine how the complex properties of nerve cells function in the generation of behavior.
(19) These processes may be conserved in a wide range of invertebrates and vertebrates.
(20) The action of ocular screening pigments of vertebrates (melanins) as well as those of invertebrates (ommochromes) on lipid peroxidation has been studied.
Statolith
Definition:
Example Sentences:
(1) On the whole, our observations indicate that the cell-extracellular matrix junction is a sine qua non for graviperception in statolith-free Chara internodal cells and we suggest that the gravireceptor is located in this region.
(2) The possibilities that other organelles function as statoliths are considered, and it is concluded not only that georeception is independent of starch grains, but further that it may not be due to statoliths at all in an ordinary sense.
(3) The occurrence of fluorite in mysid statoliths confirms the earlier interpretations based on insufficient documentation.
(4) The statolith usually occupies only a small part of the cavity of the statocyst, and it is situated in the anterior part of the statocyst.
(5) While recording from the statocyst nerve of Homarus americanus, we deflected the statolith hairs from the "rest" position they assumed after the lith was removed.
(6) The external surface of the statolith is macroscopically smooth.
(7) The statolith consists of a closely packed mass of these crystals, sometimes they are irregularly arranged, where in others they are stacked with their long axes parallel.
(8) The statolith is made up of crystalline subunits, the statoconia.
(9) Major findings from this investigation were the absence of rhopalia and statoliths in ephyrae at 150 and 200 Gy, a reduction in pulses per minute in the ephyrae at 100, 150, and 200 Gy, a reduction in ephyrae released at 150, 200, and 400 Gy, and the development of polyp monsters.
(10) X-ray diffraction patterns show that the statoliths of marine mysid crustaceans are composed of fluorite, and that this mineral is also a principal phase of the gizzard plates of some tectibranch gastropods.
(11) Larval Aplysia contain a single statolith within each statocyst; when the animals grow to a critical size, they begin producing multiple statoconia, a process that continues throughout life.
(12) Statoliths from large animals are marginally larger than those from smaller ones.
(13) The possibility that the Tullio phenomenon may be due to an abnormal excitation of the statolith organs is discussed.
(14) Morphology of the ephyrae, and statolith and rhopalia numbers were recorded using the light microscope.
(15) The single statolith has an amorphous internal structure whereas the multiple statoconia have calcification deposited on concentric layers of membrane or matrix protein.
(16) The statoliths of Sepia officinalits, Octopus vulgaris, Alloteuthis subulata and Taonius megalops have a smooth outline, but an irregular shape.
(17) The irregularity of the statolith of the lobster, Homarus americanus, probably causes a large and haphazard variation in the response of the individual statocyst receptors to body rotation.
(18) The size and outline of these large subunits do vary in different parts of the statolith.
(19) Experiments in defined media (seven basic salts mixed in deionized water) with seven species of cephalopods demonstrated clearly that there is 100% normal development of the aragonite statoliths when strontium levels were 8 mg l-1.
(20) Conversely, statoliths did not develop when strontium was absent.