NDLI: Effects of dehydration and rehydration on body temperatures in the black Bedouin goat

Content Provider	Springer Nature Link
Author	Jessen, C. Dmi’el, Razi Choshniak, Itzhak Ezra, David Kuhnen, Gert
Copyright Year	1998
Abstract	The temperatures of the arterial blood and the brain in black Bedouin goats were measured continuously by miniature data loggers. The animals were either euhydrated or dehydrated to 75–80% of the initial body mass by withholding water for 3–4 days during exposure to intense solar radiation. The daily blood temperature means and maxima of were significantly higher in dehydration than in euhydration, but 40°C was rarely exceeded even during the hot hours of the day. Selective brain cooling occurred in euhydration, but its extent was small when blood temperature was below 39.5°C. In dehydration, however, selective brain cooling was frequent and the standard response when blood temperature exceeded 39°C. We believe that selective brain cooling contributes to the inhibition of evaporative heat loss, which is the primary cause of the higher blood temperature in dehydration. Rapid rehydration with cold water induced long-lasting depression of blood temperature. No evidence was found for mechanisms attenuating the subsequent decrease of brain temperature which occurred a few minutes after the uptake of cold water.
Starting Page	659
Ending Page	666
Page Count	8
File Format	PDF
ISSN	00316768
Journal	Pflügers Archiv
Volume Number	436
Issue Number	5
e-ISSN	14322013
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-08-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical) Clinical Biochemistry

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