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John Ostrom
Started debate over hot blooded vs warm blooded dinosaurs. They had anatomy suggesting an active lifestyle
Metabolism
Chemical activity of cells that generates heat.
Metabolic rate
A measure of oxygen consumption
Endothermic
Endo = inside, thermic = temperature
Ectothermic
Ecto = outside thermic = temperature
Homeothermic
Homeo = same. Maintain a constant temperature
Poikilothermic
Fluctuating core temperature with the ambient temperature
Benefits of endothermy
Greater potential for constant activity, and ability to be fully active at night
Costs of endothermy
Must consume ten times the amount of food as a similar sized ectotherm.
Inertial homeothermy or gigantothermy
Body temperature is maintained by virtue of size rather than greater metabolic rates.
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