Results 251 to 260 of about 11,588 (303)

Hypochord in the anurans

Experientia, 1964
L'hypocorde des Anoures est d'origine endodermique. Sa reaction a la phosphatase alcaline s'accroit graduellement jusqu'a l'apparition des vacuoles. Au cours de sa fusion avec le canal perichondral, une reaction a l'enzyme s'observe a la surface externe de la membrane cellulaire. L'hypocorde peut aussi contribuer a la formation des vertebres.
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Osteoderms in Anurans

Journal of Herpetology, 1984
Dermal ossifications-- osteoderms- are more common in anurans than has been gen- erally acknowledged. In the hylid Phyllomedusa bicolor osteoderms are located in the dermis, cover the dorsal surface of the head and body, and are scattered on the lateral and ventral surfaces and the limbs.
Rodolfo Ruibal, Vaughan Shoemaker
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Allometry in vestibular responses of anurans

Advances in Space Research, 1999
Frogs 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, T, Naitoh, A, Kashiwagi, Y, Kondo, R J, Wassersug   +4 more
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Gustatory sensitivity of an anuran to cantharidin

Experientia, 1990
Glossopharyngeal nerve stimulation of the bullfrog, Rana catesbeiana, revealed responsiveness to low levels of cantharidin (1.3 x 10(-6) M), providing a first demonstration of neural gustatory sensitivity of an animal to this defensive chemical from blister beetles (Meloidae).
S T, Kelling, B P, Halpern, T, Eisner
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ANURAN COMMUNICATION

Copeia, 2002
stri ...
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The Zoocartographic Approach to Anuran Ecology

Zoologica Africana, 1971
No ...
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Chemoarchitecture of the anuran auditory midbrain

Brain Research Reviews, 2000
The 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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Cellular differentiation in the anuran pronephros

The Anatomical Record, 1963
AbstractRibonucleic 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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Control of breathing in anuran amphibians

Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2007
The 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., Milsom, William K.   +1 more
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Anuran feeding after hypophysectomy

General and Comparative Endocrinology, 1971
Spontaneous 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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