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The development of the ultimo-branchial body in the frog Pseudacris nigrita triseriata

, : The development of the ultimo-branchial body in the frog Pseudacris nigrita triseriata. Trans Amer Micros Cop Soc 83(3): 330-337

The ultimobranchial bodies of 67 specimens of the frog, Pseudacris nigrita triseriata in various stages of development were examined histologically and histo-chemically. These structures arose from the pharyngeal floor at the level of the 6th pouch at Shumway stage 24 and possessed cells which contained basophilic cytoplasm and glycoproteins during the period of differentiation. Increase in size of the structure was generally confined to the post-metamorphic phase. During incipient metamorphosis, the follicular epithelium became slightly pseudostratified and occasional extruded nuclei were found within the lumen. Secretory products were not found in these ductless bodies until climactic metamorphorsis, at which time mucoproteins and acid mucopolysaccharides were detectable. Adult structures also contained neutral mucopolysaccharides. Parafollicular cells were present only during climactic metamorphosis and appeared to contribute to the formation of the follicular epithelia. Extruded nuclei and secretions similar to those of goblet cells indicated a holocrine activity. The epithelia of the ultimobranchial bodies acquired basement membranes, became pseudostratified and vascularization was pronounced during climactic metamorphosis, indicating a possible unknown endocrine activity. The presence of paired, actively secreting ultimobranchial bodies during climactic metamorphosis suggests its role in this phase, since urodeles, which possess a single gland of reduced activity, do not complete metamorphosis.

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Accession: 025727039

DOI: 10.2307/3224743

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Molokov V.A.; Ziganshin R.A., 1982: Characteristics of the water protection and soil protection role of mountain dark coniferous taiga in the khamar daban russian sfsr ussr. The water-guarding and soil-protective role of dark coniferous taiga in the Khamar-Daban was studied. There is a high quality of river water in the mountain region, fast absorption of water by soil under forests and weak resistance of soil structu...

Masy, Eric; Adriaenssens, Eric; Montpellier, Claire; Crepieux, Pascale; Mougel, Alexandra; Quatannens, Brigitte; Goormachtigh, Gautier; Faumont, Nathalie; Meggetto, Fabienne; Auriault, Claude; Groux, Herve; Coll, Jean, 2002: Human monocytic cell lines transformed in vitro by Epstein-Barr virus display a type II latency and LMP-1-dependent proliferation. Epstein-Barr virus (EBV) classically infects and transforms B lymphocytes in vitro, yielding lymphoblastoid cell lines (LCLs). In contrast to other herpesviruses, EBV is not described as an infectious agent for monocytes. However, recent papers de...

Coleridge, Hazel M.; Coleridge, J. C. G.; Luck, J. C., 1965: Pulmonary afferent fibres of small diameter stimulated by capsaicin and by hyperinflation of the lungs. Experiments were carried out to determine whether injection of capsaicin (known to evoke reflex hypotension, bradycardia and apnea) stimulates afferent endings in the lung. In anesthetized dogs with open chest, impulses were recorded from afferent...

Cachier H.; Bremond M P.; Buat Menard P., 1989: Determination of atmospheric soot carbon with a simple thermal method. The dark component of carbonaceous aerosols is often referred to as "soot carbon". Soot consists of pure elemental carbon along with highly polymerized organic matter. An accurate discrimination between the soot carbon and the other comp...

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Loewenstein M.S., 1972: Epidemiology of clostridium perfringens food poisoning. New England Journal of Medicine 286(19): 1026-1028

Zhu, C; Yamamura, S; Koiwa, H; Nishihara, M; Sandmann, G., 2002: CDNA cloning and expression of carotenogenic genes during flower development in Gentiana lutea. All cDNAs involved in carotenoid biosynthesis leading to lycopene in yellow petals of Gentiana lutea have been cloned from a cDNA library. They encode a geranylgeranyl pyrophosphate synthase, a phytoene synthase, a phytoene desaturase and a zeta-c...

Olenev S.N.; Suslov V.E.; Danilov A.A.; Baburin V.E.; Balashov V.L., 1986: Increasing the accuracy of measurements and the automatization of the processing of data obtained with the use of a double wavelength method on a microspectrocytophotometer mcfv 1 leningrad optical instrument association. Arkhiv Anatomii Gistologii i Embriologii 91(8): 83-86

Levine, E. G.; Arthur, D. C.; Gajl-Peczalska, K. J.; Lebien, T. W.; Peterson, B. A.; Hurd, D. D.; Bloomfield, C. D., 1986: Correlations between immunological phenotype and karyotype in malignant lymphoma. We have correlated immunological characteristics and karyotypic abnormalities from lymphomas in 118 patients. T-lymphomas differed significantly from B- and non-B-, non-T-lymphomas in having more normal metaphases, trisomy 19, and breaks at 1q21,...

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