KIN 155 Lecture Notes - Lecture 8: Homeothermy, Acclimatization, Evaporation
18 Mar 2016
School
Department
Course
Professor
Document Summary
Body temperature regulation: we have mechanisms to control our internal temps (sweat to cool down, shiver to heat up) humans = homeothermic (refers to mechanisms), reptiles are not homeothermic/cold-blooded. Acclimation is short-term adaptation to environmental stresses, acclimatization is long term people acclimatize when climbing a mountain (make more red blood cells to make more oxygen) Body temp regulation: metabolic heat production atp breakdown is inefficient because energy is lost as heat. Heat moves from body core to the body shell via blood. We transport blood to the skin to get rid of heat by conduction, convection, radiation, evaporation. M = metabolic heat reduction, w = work, r = radiation, e = evaporation, k = convection, c = conduction. M w r c k e = 0 heat balance. M w r c k e < 0 heat loss. M w r c k e > 0 heat gain. Vapor pressure is low when air is dry.
