Respiratory gaseous exchange in the Zucker rat.
Measurements were made of the oxygen consumption and carbon dioxide production of lean and obese Zucker rats ranging from 4 to 400 days of age. As expected, O2 consumption per animal increased with age and was higher in obese than in lean rats. However, O2 consumption was lower in obese animals when expressed per unit of metabolic body mass. Age per se did not influence the respiratory quotient (R), but obese animals had consistently higher Rs than lean animals. These results confirm and extend previous findings described in the literature.
Refinetti
R
R
Institute of Environmental Stress, University of California, Santa Barbara 93106.
Carlisle
H J
HJ
Horvath
S M
SM
D000375:Aging / Q000502:physiology; D000818:Animals; D001833:Body Temperature Regulation / Q000502:physiology; D005260:Female; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D010641:Phenotype; D011659:Pulmonary Gas Exchange / Q000502:physiology*; D051381:Rats; D011924:Rats, Zucker