| Thermal homeostasis in pregnant rats during heat stress. | |
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MedLine Citation:
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PMID: 479398 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Rats exposed to inescapable heat stress maintained a controlled hyperthermia while increasing heat loss by cutaneous vasodilatation and by grooming behavior. In nonpregnant rats, the evaporation of saliva groomed onto the body surfaces increased exponentially as a function of ambient temperature above 36 degrees C. This was associated with a decrease in the body temperature threshold for salivary secretion from the submaxillary gland, which then began at approximately the same body temperature as cutaneous vasodilatation. In addition, the pregnant rats maintained a lower level of controlled hyperthermia during heat stress than did nonpregnant rats. This appeared to result from a decreased production of metabolic heat, reduced insulation on the ventral surface, and an increased motivation to keep cool during heat stress. These changes met the increased need for thermolysis during pregnancy and provided for thermal homeostasis both in the pregnant rat and in the unborn fetuses. |
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Authors:
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N E Wilson; E M Stricker |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of comparative and physiological psychology Volume: 93 ISSN: 0021-9940 ISO Abbreviation: J Comp Physiol Psychol Publication Date: 1979 Jun |
Date Detail:
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Created Date: 1979-11-21 Completed Date: 1979-11-21 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0414612 Medline TA: J Comp Physiol Psychol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 585-94 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Body Temperature Regulation* Female Hot Temperature / adverse effects* Motor Activity Oxygen Consumption Pregnancy Pregnancy Complications* Rats Saliva / analysis Salivation Skin / blood supply Sodium / analysis Stress, Physiological / physiopathology* Vasodilation Water Loss, Insensible |
| Chemical | |
Reg. No./Substance:
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7440-23-5/Sodium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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