During strenuous physical activities, such as skiing (a) or running (c), the dermal blood vessels dilate and sweat secretion increases (b). These mechanisms prevent the body from overheating. In contrast, the dermal blood vessels constrict to minimize heat loss in response to low temperatures (b)
Cut Rita Zahara
“Thermoregulation,” Open Educational Resource (OER) - UNM, accessed February 29, 2020, http://oer.unm.ac.id/items/show/1019.