By William H. Dantzler
This moment variation bargains a finished evaluate of the physiological services of vertebrate kidneys from a comparative perspective, with specific emphasis on nonmammalian vertebrates. the subjects lined comprise renal constitution; glomerular ultrafiltration; tubular delivery of inorganic ions, natural components, and fluid; and urine dilution and focus. Mammalian renal functionality is just thought of for reasons of comparability with nonmammalian renal functionality and as a body of reference for a number of the discussions. the most important findings on nonmammalian renal functionality and the real unanswered questions raised via these findings are defined intimately. As such, the publication offers entire details on comparative renal functionality for organic scientists and complex scholars of biology with a few wisdom of body structure and a wish to understand extra approximately renal functionality in vertebrates, and for mammalian renal physiologists who desire to receive a broader view of renal function.
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EDITED by way of BENJAMIN KAMINER A TRIBUTE TO ALBERT SZENT GYORGYI 1977 educational PRESS
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Additional info for Comparative Physiology of the Vertebrate Kidney
D. Yokota (personal communication) Persson (1981) McVicar and Rankin (1985) Values are approximate means estimated from the references. 7 Mammals Laboratory rat 95 Rattus norvegicus (Munich-Wistar strain) Fishes River Lamprey Lampetra fluviatilis Freshwater 20 % Seawater Amphibians Congo eel Amphiuma means Reptiles Garter snake Thamnophis spp. 2 Filtration of Fluid by Glomeruli 41 42 3 Initial Process in Urine Formation 1978a, b, 1981) and on a widely studied strain of rat (Brenner et al. 1). As noted above, this observation indicates that the filtration rate is influenced by the plasma flow through the capillaries (Brenner et al.
2 Filtration of Fluid by Glomeruli 41 42 3 Initial Process in Urine Formation 1978a, b, 1981) and on a widely studied strain of rat (Brenner et al. 1). As noted above, this observation indicates that the filtration rate is influenced by the plasma flow through the capillaries (Brenner et al. 1972). In both amphibians and mammals, the sum of the colloid osmotic pressure at the efferent end of the capillaries and the hydrostatic pressure in Bowman’s space essentially equals the randomly measured hydrostatic pressure in the glomerular capillaries, suggesting that the latter pressure does, in fact, decrease little along the length of the capillary network (Brenner et al.
28 2 Renal Morphology Fig. 13 Drawings of the proximal tubule ultrastructure in mammalian kidneys. To demonstrate the cellular interdigitations, neighboring cells and their processes are covered by a stippled texture. (a) P1 segment. The cellular interdigitations are most extensive and extend to the apical ends of the cells. The brush border is dense and high. (b) P2 segment. The cellular interdigitations are decreased; apically, the cells have a smooth outline. The brush border is less dense and reduced in height.