I don't want to sound like an idiot, but this is what I can recall/think of from lecture and reading. (This is a final exam self-review that I am working on) Increased thermogenesis: increase in basal metabolism, muscle activity (shivering, exercise, etc), an increase in thyroxine and epi levels and an increase in temperature Decreased thermogenesis: decrease in basal metabolism, physical inactivity, radiation, conduction, convection, evaporation, decrease in temperature, decrease in thyroxine and epi levels