level: homeostasis
Questions and Answers List
level questions: homeostasis
| Question | Answer |
|---|---|
| skin diagram (remember) | here |
| what is homeostasis | the constant maintenance of steady internal environment |
| what happens when we are too hot | vasodialtion (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 cold | hairs stand up - more insulating air trapped close to body, shiver - contraction of muscle releases heat and vasoconstriction (arterioles constrict) - less heat lost by radiation. |