THE SOUTHERN BULLFROG, RANA GRYLIO STEJNEGER
نویسندگان
چکیده
منابع مشابه
Glomerular permeability in the bullfrog Rana catesbeiana
Filtration studies suggest similar size pores in the glomerular filters of mammals and amphibians. However, the glomerular wall in the bullfrog exhibits several structural features not found in mammals. The subendothelial space of the basement membrane is often greatly enlarged and infiltrated by cellular elements. The lamina densa of the basement membrane shows extensive variation in thickness...
متن کاملOlfactory bulb projections in the bullfrog Rana catesbeiana.
The projections of the accessory and main olfactory bulbs of the bullfrog are described as part of a long term analysis of the morphological differences in amphibian and reptilian telancephalons. Unilateral aspiration of the accessory olfactory bulb results in an ipsilateral projection to the pars lateralis of the amygdala via the accessory olfactory tract. Degenerating fibers from the accessor...
متن کاملOntogeny of heart rate regulation in the bullfrog, Rana catesbeiana.
Heart rate (fH) at 20-23 degrees C was recorded in six different developmental stages of the bullfrog, Rana catesbeiana (n = 104, body mass 40 mg to 90 g), at rest after normoxic acclimation, during acute changes in O2 availability, and after brief but intense activity. The effects of cholinergic blockade and combined cholinergic and beta-adrenergic blockade on the response to this experimental...
متن کاملPurification and cloning of cytotoxic ribonucleases from Rana catesbeiana (bullfrog).
Ribonucleases with antitumor activity are mainly found in the oocytes and embryos of frogs, but the role of these ribonucleases in frog development is not clear. Moreover, most frog ribonuclease genes have not been cloned and characterized. In the present study, a group of ribonucleases were isolated from Rana catesbeiana (bullfrog). These ribonucleases in mature oocytes, namely RC-RNase, RC-RN...
متن کاملVariation of total mercury concentrations in pig frogs (Rana grylio) across the Florida Everglades, USA.
The Pig Frog (Rana grylio) is an aquatic frog that is an abundant component of the Everglades ecosystem. South Floridians recreationally and commercially hunt pig frogs in marshes throughout Water Conservation Areas (WCA) and Big Cypress National Preserve (BCNP) in South Florida. Most of these areas are under fish consumption advisories because of high levels of methylmercury present in game fi...
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ژورنال
عنوان ژورنال: Science
سال: 1916
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.44.1128.205