Thermoregulation in homoiothermic and poikilothermic animals Flashcards
What is homoiothermic?
warm blooded –> produces enough heat to compensate for heat loss.
What is poikilothermic?
cold blooded –> body temperature varies with that of the environment. Neuroendocrine regulatory mechanisms are non operative/inadequate under cold conditions.
What happens to the metabolic processes of homoiothermic organisms in cold environment?
It increases to compensate for higher heat losses. Body temperature remains constant.
Are homoiothermic animals dependant on thermal environment?
No but they need more food for higher metabolic activity in the cold.
What happens to the metabolic processes of poikilothermic animals in cold temperature?
reduce body temperature and metabolic rate declines. Activity and contact with environment decrease –> lethargy.
Are poikilothermic animals dependent on a higher energy supply in cold temperatures?
No they are dependant on external heat sources, no insulation.
