(1) While in the brains of adult homeothermic vertebrates (with thermo-regulation: mammals, birds) the di-sialoganglioside GD1a predominates, in the brain of poikilotherms (without thermo-regulation: e.g.
(2) Thus, whereas a change in central MSH sensitivity may contribute to reduced fever in aged homeotherms, a reduction in central pyrogen receptors appears to be the most parsimonious explanation.
(3) The relationship between body size and basal metabolic rate (BMR) in homeotherms has been treated in the literature primarily by comparison between species of mammals or birds.
(4) Some homeothermic animals can survive adverse conditions by hibernation, i.e., by reducing their body temperature in accordance with ambient temperature, thus reducing metabolism and vital functions.
(5) By extension these findings implicate the Na+ pump as a heat source in the evolution of the homeotherms.
(6) On the 15th day after hatching, chinstrap chicks were completely, and gentoo chicks almost completely, homeothermic.
(7) These results may indicate that the homeothermic metabolic response in late embryos is O2-conductance-limited and power-limited as previously suggested.
(8) For mild cooling (32 degrees C), the Q10 in 18-day-old embryos was about 1.5, while 12- and 16-day-old embryos had a Q10 value of about 2, indicating that a feeble homeothermic metabolic response to cooling appears in late prenatal embryos.
(9) R-band exons in homeotherms but not G-band exons have directionally acquired GC-rich wobble bases and the corresponding codon usage: CpG islands in mammals are specific to R-band exons, exons not facultatively heterochromatinized, and are independent of the tissue expression pattern of the gene.
(10) The carp muscle enzyme was less sensitive to AMP inhibition than the muscle enzyme from a homeothermic mammal.
(11) This observation, when coupled with the experimental results, suggests that the effect of low [K]o on membrane permeability in homeothermic preparations of cardac muscle should be reevaluated.
(12) The hibernation season in the arctic ground squirrel (Citellus undulatus) is broken into 8- to 18- day cycles by short homeothermal periods during which the carboydrate reserves depleted during hibernation are replenished.
(13) The relative susceptibility of rabbit (homeothermic) kidney to mercury intoxication was compared to that of Coho salmon (poikilothermic) kidney to mercury intoxication was compared to that of Coho salmon (poikilothermic) kidney over temperature ranges consistent with the habitat of each of the two species.
(14) We have compared changes in axon numbers in the developing optic nerves of eight homeotherms (seven mammals and one bird) using data from the available literature and our own material.
(15) Phylogenetic data indicate that the complete psysiological and behavioral manifestations of sleep are unique to homeotherms; furthermore "ontogeny recapitulates phylogeny" in the parallel development of slow wave sleep and thermoregulation as exemplified in the opossum.
(16) The adult tapeworm lives in the intestine of a homeothermic host and has a pattern of very active and never ending growth.
(17) Color-coded liquid plastic was injected intraparenchymally (not into the blood vessels) into more than 300 hearts of homeotherms--including dog, cat, sheep, beef, horse, mammalian dolphins, chickens, turkeys, etc.
(18) Increased host resistance to viral and bacterial infections has also been noted in homeotherms whose body temperature has been elevated by manipulation of ambient temperature.
(19) However, the effect of ambient temperature on intestinal transit in homeothermic neonates such as pigs, calves, and humans may be different from that in mice because neonatal mice are poikilothermic.
(20) The spadix of Symplocarpus foetidus L. maintains an internal temperature 15 degrees to 35 degrees C above ambient air temperatures of -15 degrees to +15 degrees C. For at least 14 days it consumes oxygen at a rate comparable to that of homeothermic animals of equivalent size.
Poikilothermic
Definition:
(a.) Having a varying body temperature. See Homoiothermal.
Example Sentences:
(1) These results from a non-mammalian poikilothermic vertebrate provide additional evidence in favour of the cross-linkage theory of ageing and suggest a common pattern of collagen ageing in vertebrates.
(2) A possible role of the pineal of poikilotherms in the transduction of several environmental factors, via the daily pattern of melatonin secretion, is hypothesized.
(3) Of 26 non-O1 isolates selected for cytotoxin and enterotoxin production, 23 showed a wide spectrum of cytotoxic effects on cell lines of poikilothermic and homoiothermic species, but they were weakly enterotoxigenic in the infant mouse test.
(4) It is concluded that the hepatoma observed in poikilothermic animals (rainbow trout) is similar to the liver tumors found in birds and mammals.
(5) While in the brains of adult homeothermic vertebrates (with thermo-regulation: mammals, birds) the di-sialoganglioside GD1a predominates, in the brain of poikilotherms (without thermo-regulation: e.g.
(6) beta NA1 Val, beta EF6 Lys and beta H21 His are identical with 2,3-bisphosphoglycerate-(DPG)binding sites in mammalian hemoglobins, whereby rhinoceros hemoglobin resembles both ATP-sensitive poikilotherm hemoglobin and DPG-sensitive mammalian hemoglobin.
(7) As visual sensitivity limited by thermal events should rise when the temperature falls, poikilothermous vertebrates living at low temperatures should then reach light sensitivities unattainable by mammals and birds with optical factors equal.
(8) The influence of temperature on the senescence of poikilotherms is briefly examined.
(9) Rates of autoxidation may be intimately related to hemoglobin function thus providing a means for studying hemoglobin adaptation in poikilothermic vertebrates, especially among cold-adapted species.
(10) The role of homeoviscous adaptation in the compensation of the rates of membrane processes during thermal acclimation, and upon the resistance adaptation of poikilotherms to extreme temperatures is discussed.
(11) The rainbow trout lens was used as the poikilothermal lens and the rat lens as the homothermal lens.
(12) The relative susceptibility of rabbit (homeothermic) kidney to mercury intoxication was compared to that of Coho salmon (poikilothermic) kidney to mercury intoxication was compared to that of Coho salmon (poikilothermic) kidney over temperature ranges consistent with the habitat of each of the two species.
(13) It was shown that the effect of low temperatures on a certain part of a body of a poikilothermic animal has induced both a response of the whole organism and a much more acute response of the cooled tissues.
(14) The viral susceptibility range of a poikilothermic cell line derived from the fathead minnow (Pimephales promelas) (FHM) to infection by a number of homoiothermic viruses representing most of the presently recognized viral groups and a member of the psittacosis-lymphogranuloma-trachoma group of agents was studied.
(15) Analysis of particular tests demonstrated disturbed thermometry mostly in poikilothermics.
(16) The sequences show a 53-65% identity with non-Antarctic poikilotherm fish species; on the other hand, a very high degree of similarity (83-88%) has been found between Hb 1 and the major component of another Antarctic species of a different family.
(17) However, the effect of ambient temperature on intestinal transit in homeothermic neonates such as pigs, calves, and humans may be different from that in mice because neonatal mice are poikilothermic.
(18) The thermal independence of transmitter release may be an important mechanism in allowing poikilothermic animals to maintain physiological function over a wide range of body temperatures.
(19) The rate and form of growth of Histoplasma capsulatum within histiocytes derived from homothermic and poikilothermic animals, and incubated at 25, 30, and 37 C, are described.
(20) These results can be interpreted by the existence of particular selective pressures operating in poikilothermic species as it was already suggested by Du Pasquier.