Physiological Responses to Cold Environments
	• Homeostasis- Warm-blooded mammals maintain a relatively constant body temperature regardless of ambient conditions- humans 37oC • Homeostasis achieved by control mechanisms that regulate heat production and loss • Core body temperature drop of a few degrees reduces enzymatic activity, coma, death • Core body temperature increases of a few degrees may irreversibly damage the central nervous system • C Van Wie (1974) Physiological response to cold environments. Arctic & Alpine Enviornments