Results 291 to 300 of about 24,078 (347)
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Cellular differentiation in the anuran pronephros
The Anatomical Record, 1963AbstractRibonucleic acid (RNA) is detectable histochemically by means of methyl green pyronin staining (controlled with ribonuclease) in the cytoplasm of the proximal tubules of the frog (Rana pipiens). This is seen at Shumway stage 23 when the proximal tubules become differentiated from the remainder of the tubular complex.
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Call acoustics reflect body size across four clades of anurans
Journal of Zoology, 2013Markus Boeckle
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Allometry in vestibular responses of anurans
Advances in Space Research, 1999Frogs and toads turn either their heads or bodies opposite to angular accelerations applied around the yaw axis. Thresholds exist for the minimum angular acceleration that induces this vestibulomotor response in individual frogs. These thresholds were recorded for several anuran species that cover a broad range of sizes and life styles.
M, Yamashita +4 more
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Chemoarchitecture of the anuran auditory midbrain
Brain Research Reviews, 2000The anuran torus semicircularis consists of several subnuclei that are part of the ascending auditory pathway as well as audiomotor interface structures. Additionally, recent anatomical studies suggest that the midbrain tegmentum is an integral part of the audiomotor network.
H, Endepols, W, Walkowiak, H, Luksch
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Control of breathing in anuran amphibians
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2007The primary role of the respiratory system is to ensure adequate tissue oxygenation, eliminate carbon dioxide and help to regulate acid-base status. To maintain this homeostasis, amphibians possess an array of receptors located at peripheral and central chemoreceptive sites that sense respiration-related variables in both internal and external ...
Gargaglioni, Luciane H. +1 more
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Dorsal striatopallidal system in anurans
Journal of Comparative Neurology, 2003AbstractThe dorsal striatopallidal system of tetrapods consists of the dorsal striatum (caudate‐putamen in mammals) and the dorsal pallidum. Although the existence of striatal and pallidal structures has been well documented in anuran amphibians, the exact boundaries of these structures have so far been a matter of debate.
Heike, Endepols +4 more
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The Zoocartographic Approach to Anuran Ecology
Zoologica Africana, 1971No ...
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Micron, 2007
The morphological characteristics of the leptodactylid integument of Proceratophrys and Odontophrynus genera were investigated by means of stereoscopic, low vacuum scanning electron and light microscopy. The integument surface of Proceratophrys boiei, Proceratophrys laticeps and Proceratophrys appendiculata exhibited several projections, while the ...
F A, Felsemburgh +2 more
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The morphological characteristics of the leptodactylid integument of Proceratophrys and Odontophrynus genera were investigated by means of stereoscopic, low vacuum scanning electron and light microscopy. The integument surface of Proceratophrys boiei, Proceratophrys laticeps and Proceratophrys appendiculata exhibited several projections, while the ...
F A, Felsemburgh +2 more
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Anuran feeding after hypophysectomy
General and Comparative Endocrinology, 1971Spontaneous feeding continued in toads (Bufo americanus) and frogs (Rana p. pipiens) for 8–30 days following removal of the pars distalis. The toads always died within a few days after cessation of feeding. It is concluded that the pars distalis is not as essentially involved in normal feeding mechanisms as recently postulated by Dierickx.
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