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level: homeostasis

Questions and Answers List

level questions: homeostasis

QuestionAnswer
skin diagram (remember)here
what is homeostasisthe constant maintenance of steady internal environment
what happens when we are too hotvasodialtion (arterioles dilate) - more heat lost by radiation, sweat evaporates and cools the body, hair lies flat - less insulating air trapped close to the body
what happens when we are too coldhairs stand up - more insulating air trapped close to body, shiver - contraction of muscle releases heat and vasoconstriction (arterioles constrict) - less heat lost by radiation.