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Comparison of the effect of anoxic anoxia and apnea on renal function in the harbor seal (Phoca vitulina, L.)

โœ Scribed by Lowrance, Preston B. ;Nickel, James F. ;Smythe, Cheves McC. ;Bradley, Stanley E.

Publisher
Wiley (John Wiley & Sons)
Year
1956
Tongue
English
Weight
735 KB
Volume
48
Category
Article
ISSN
0095-9898

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โœฆ Synopsis

The harbor seal (Phoca vitulina, L.) must tolerate repeated periods of asphyxia as a consequence of the apnea of diving. Irving, Scholander and Grinnell ( '42) have shown that the hemodynamic responses to diving involve the development of bradycardia and diminution of blood flow through the muscles of the back. The renal circulation participates actively in this vasoconstrictive response to asphyxia (Bradle? and Bing, '42). Sodium, potassium and water output decrease sharply in association with a fall in renal blood flow and glomerular filtration (Bradley, Riudge and Blake, '54). The mechanism of this response remains obscure. Anoxemia hecomes evident shortly after apnea is induced, and may possi1)ly play an important role in altering renal tubular function and urine for-'Aided by the Edward N. Gibbs Prize Fund, New York Academy of Medicine,

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Renal function in the harbor seal (Phoca Vitulina L.) during asphyxial ischemia and pyrogenic hyperemia
โœ Bradley, Stanley E. ;Bing, R. J. ๐Ÿ“‚ Article ๐Ÿ“… 1942 ๐Ÿ› Wiley (John Wiley & Sons) ๐ŸŒ English โš– 466 KB

and the Depnrtments of Medicine and Physiology, S c w Fork. University College of Medin'ne THREE FIGURES Irving aiicl his collaborators (Irving, '39 ; Irving, et al., '42) have demonstrated that the seal, like other diving mammals, can survive long periods of asphyxia during diving by a coordinated

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The adaptive response of the seal to diving appears composed of two changes, a reflex bradycardia with resultant decrease in cardiac output reported by Scholander ('40), and an arterial constrictor response with cessation of blood flow through muscle beds described by Irving, Scholander, and Grinnel