Results 141 to 150 of about 924 (173)

Topological analysis of the brain stem of the lungfish Lepidosiren paradoxa

Journal of Comparative Neurology, 1979
AbstractThe ventricular sulcal pattern and the cellular structure of the brain stem of the lungfish Lepidosiren paradoxa have been studied in transversely cut Nissl and Bodian stained sections. Five longitudinal sulci, the sulcus medianus inferior, the sulcus intermedius ventralis, the sulcus limitans, the sulcus intermedius dorsalis and the sulcus ...
F, Thors, R, Nieuwenhuys
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Histology and ultrastructure of the neurohypophysis of the south american lungfish, Lepidosiren paradoxa

Zeitschrift f�r Zellforschung und mikroskopische Anatomie, 1972
The neurohypophysis of the South American lungfish Lepidosiren paradoxa has been studied with light and electron microscopy, including the Falck-Hillarp technique for catecholamines. The pars nervosa hypophyseos is a well-marked, dorsally located subdivision of the pituitary gland composed of lobes or follicles, each one constituted of a central core ...
D, Zambrano, F C, Iturriza
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Testosterone-induced development of limb gills of the lungfish, Lepidosiren paradoxa

Comparative Biochemistry and Physiology Part A: Physiology, 1973
Abstract 1. 1. Parenteral administration of testosterone enanthate in the lungfish, Lepidosiren paradoxa , induces growth of pectoral and pelvic hindlimb vascular filaments. 2. 2. The filaments have the microstructure of primitive gills, and are comparable to the nuptial developments of the male in the Paraguayan Chaco described by ...
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Urea biosynthesis in the south american lungfish, Lepidosiren paradoxa: Relation to its ecology

Comparative Biochemistry and Physiology Part A: Physiology, 1972
Abstract 1. 1. Rates of hepatic urea biosynthesis, as measured by the incorporation of 14 C-bicarbonate into urea, and activities of the separate ornithineurea cycle enzymes in the South American lungfish, Lepidosiren , are intermediate between corresponding values previously determined in the African lungfish, Protopterus , and in the ...
D, Funkhouser, L, Goldstein, R P, Forster   +2 more
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On the cardiac control in the South American lungfish, Lepidosiren paradoxa

Comparative Biochemistry and Physiology Part A: Physiology, 1989
Abstract 1. 1. The mechanisms behind cardiac control were investigated in the South American lungfish, Lepidosiren paradoxa , using fish with chronically implanted cannulae and electromagnetic flow probes. In addition, a preliminary study was made of the cardiovascular events associated with air breathing. 2. 2.
Axelsson, Michael, Abe, Augusto Shinya, Eduardo, José, Bicudo, P. W., Nilsson, Stefan   +4 more
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VII.—Note on the Sympathetic Nervous System of Lepidosiren paradoxa

Proceedings of the Royal Society of Edinburgh, 1929
Up to the present time no sympathetic nervous system has been described in Lepidosiren paradoxa, and the following note is an attempt to fill this gap in our knowledge.
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Lepidosiren paradoxa : anatomisch untersucht und beschrieben

durch D.Th. Ludw.
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Histological and enzymatic studies on the nephron of the lungfish,Lepidosiren paradoxa

Japanese Journal of Ichthyology, 1986
Nephron of South American lungfish was examined historically and enzyme-histochemically. Cells of the first and second proximal segments exhibited poor interdigitation forming narrow intercellular spaces, whereas the distal segment consisted of deeply interdigitated cells with wide intercellular spaces. Activities of aerobic enzymes (malate, isocitrate,
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XXXII.—The Continuity of the Vertebrate Nervous System: Studies on Lepidosiren paradoxa

Transactions of the Royal Society of Edinburgh, 1925
As is well known, one of the chief problems relating to the vertebrate nervous system is the question of its continuity or discontinuity both in the adult and in the embryo. The upholders of the latter theory believe that the neurones of the adult are not in continuity but only come into close contact by means of the synapses, while in the embryo the ...
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NEUROHYPOPHYSIAL HORMONES OF THE SOUTH AMERICAN LUNGFISH LEPIDOSIREN PARADOXA

Journal of Endocrinology, 1966
B T, Pickering, S, McWatters
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