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Control of arterial pressure in aquatic sea snakes

Control of arterial pressure in aquatic sea snakes aquatic F. HARVEY POUGH Department of Physiology Cell Biology, University of Kansas, Lawrence, Kansas 66045; Section of Ecology Systematics, Langmuir Laboratory, Rerch Park, Cornell University, Ithaca, New York 14853 LILLYWHITE, HARVEY B., F. HARVEY POUG ControZ of arterial pressure aquatic . Am. J. Physiol. 244 (Regulatory tegrative Comp. Physiol. 13): R66-73, 1983.Cardiovascular responses to head-up tilt, acutely graded hemorrhage, pharmacologic stimulation by prcipal autonomic drugs were studied four species of mare , prcipally Aipysurus Zaeuis (family Hydrophiidae). Arterial pressure varied versely with tilt angle blood volume deficit conscious outside of water, dicatg that physiological regulation was poor or lackg. Calculated arterial at head level typically dimished to zero A. Zaeuis tilted to angles 230 O. Arterial pressure (corrected for external water pressure) did not change when these were tilted water. Changes of arterial pressure duced by tilt, blood loss, or autonomic drugs elicited reflex adjustments heart activity, but the magnitude of these responses was less than that observed terrestrial species of snake. It is concluded that baroreflexes are present but comparatively effective . tolerated large losses of blood volume, extravascular fluids were absorbed to the circulation durg hemorrhage; both hemorrhage estimated hemodilution volumes exceeded 100% of the itial http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png AJP - Regulatory, Integrative and Comparative Physiology The American Physiological Society

Control of arterial pressure in aquatic sea snakes

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Publisher
The American Physiological Society
Copyright
Copyright © 1983 the American Physiological Society
ISSN
0363-6119
eISSN
1522-1490
Publisher site
See Article on Publisher Site

Abstract

aquatic F. HARVEY POUGH Department of Physiology Cell Biology, University of Kansas, Lawrence, Kansas 66045; Section of Ecology Systematics, Langmuir Laboratory, Rerch Park, Cornell University, Ithaca, New York 14853 LILLYWHITE, HARVEY B., F. HARVEY POUG ControZ of arterial pressure aquatic . Am. J. Physiol. 244 (Regulatory tegrative Comp. Physiol. 13): R66-73, 1983.Cardiovascular responses to head-up tilt, acutely graded hemorrhage, pharmacologic stimulation by prcipal autonomic drugs were studied four species of mare , prcipally Aipysurus Zaeuis (family Hydrophiidae). Arterial pressure varied versely with tilt angle blood volume deficit conscious outside of water, dicatg that physiological regulation was poor or lackg. Calculated arterial at head level typically dimished to zero A. Zaeuis tilted to angles 230 O. Arterial pressure (corrected for external water pressure) did not change when these were tilted water. Changes of arterial pressure duced by tilt, blood loss, or autonomic drugs elicited reflex adjustments heart activity, but the magnitude of these responses was less than that observed terrestrial species of snake. It is concluded that baroreflexes are present but comparatively effective . tolerated large losses of blood volume, extravascular fluids were absorbed to the circulation durg hemorrhage; both hemorrhage estimated hemodilution volumes exceeded 100% of the itial

Journal

AJP - Regulatory, Integrative and Comparative PhysiologyThe American Physiological Society

Published: Jan 1, 1983

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