BIO120H1 Lecture Notes - Lecture 15: Woolly Mammoth, Volumetric Heat Capacity, Homeostasis

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Spencer C H Barrett

Document Summary

Metabolic heat, and heat exchange with the environment. Either escapes your body or moves in depending on the temperature. Convective cooling is enhanced with moisture (sweat or any other water that is evaporating off of your body) Size matters when it comes to heat balance. Bigger, higher heat content and thermal inertia since they have small surface area. Volume determines how much heat content is in your body. Two large classes of vertebrates: homeotherms follow birdman"s rule which says that homeotherms tend to be larger at higher latitudes e. g. bears. The specie is the same but owing to varying environments, the size fluctuates: poikilotherms not much physiological ability to balance body temperature; their temperatures fluctuate. Body weight declines with annual temperature based on birdman"s law. The african elephant is an exception to birdman"s law because allan"s rule which is concerned with appendages. Elephants have big ears for heat exchange, they help increase the surface area to volume ratio.