The effect of ambient temperature upon post-natal changes in oxygen consumption of the guinea-pig.
1. The effect of thermal environment and administration of progesterone upon minimal oxygen consumption and thermal stability of the new-born guinea-pig has been investigated.2. It was found that the ambient temperature at which the new-born is reared does not influence minimal oxygen consumption although it modifies the response to cold.3. Thermal stability was decreased in animals raised in a warm environment.4. Minimal oxygen consumption per unit body weight during the neonatal period increased 25%, most of the increase taking place within 16 hr after birth.5. Decrease in the relative mass of brown adipose tissue was least in new-borns maintained at a high ambient temperature.6. Administration of progesterone did not affect oxygen consumption, body temperature and thermal stability of the new-born.
D000273:Adipose Tissue / Q000378:metabolism; D002001:Adipose Tissue, Brown / Q000378:metabolism; D000311:Adrenal Glands; D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D001833:Body Temperature Regulation; D001835:Body Weight; D003080:Cold Temperature; D006168:Guinea Pigs; D009929:Organ Size; D010101:Oxygen Consumption; D011374:Progesterone / Q000494:pharmacology*; D013696:Temperature; D013961:Thyroid Gland
D011374:Progesterone