When the temperature of the surrounding environment rises, body responds by:

Explanation

If the surrounding temp is higher than normal then the body will want to lose heat and hence Vasodilation will occur so that more blood passes near the surface of the body allowing rapid exchange of heat allowing the body to cool.Vasodilation occurs due to Homeostasis which is the ability to maintain a stable internal environment despite changes in the external environment. The other scenario that is possible is that if the temperature of the environment decreases, then the body will want to conserve heat, so Vasoconstriction will occur preventing heat exchange at the surface of the body.The muscles will undergo involuntary contractions (shivering) so that the movements of the muscles causes heat to be produced. Piloerection will occur where muscles will contract at the base of each body hair making them stand on end trapping an insulating air layer.