Metabolic adjustment induced by exposure to elevated ambient temperature is impaired in rats bearingt lesions in the preoptic area
Braz. j. med. biol. res
;
23(9): 831-4, 1990. ilus, tab
Article
in English
| LILACS
| ID: lil-92405
RESUMO
Metabolic adjustment was studied in rats with bilateral electrolytic lesions in the preoptic area which were exposed to heat (34-C) anda to normal temperature (25-C) for 60 days. The metabolic rate measured at neutral temperature (29-C) in preoptic-lesioned rats living at 25- or 34-C was reduced to 80% the rate of sham-operated controls. The increase in metabolic rate induced by heat (30 min at 34- or 37-C) in preoptic-lesioned rats, living at 25-C, was markedly reduced to 10% the rate of sham-operated controls living at 25-C. In preoptic-lesioned rats, the increased metabolic rate induced by heat exposure (34- or 37-C) was impaired, regardless of the living ambient temperature (25- or 34-C) of the animal. These data demonstrate the participation of the preoptic area in heat-induced invreased oxygen consumption and provide additional evidence for its role in the integration of thermal imputs with energy-linked metabolic processes
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Index:
LILACS (Americas)
Main subject:
Preoptic Area
/
Temperature
/
Fatty Acids, Nonesterified
/
Hot Temperature
Limits:
Animals
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
1990
Type:
Article
/
Congress and conference
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