Respuesta :
Arteries can constrict or dilate as needed because of the smooth muscle found in the tunica intima.
The vascular smooth muscle extends in response to an increase in perfusion, which narrows the artery. Vasodilation is the widening or expansion of the blood vessels.
If there is a decrease in pressure to the arteriole, then there is decreased stretching of the smooth muscle, leading to the relaxation of the smooth muscles and dilation of the arteriole. When the smooth muscles in the blood vessel walls contract, it occurs. The blood vessels that carry blood to the skin typically contract or narrow in reaction to cold temperatures, which reduces the blood vessel opening.
Vasoconstriction, a result of this reaction, reduces blood flow to the skin, minimizing heat loss from the heated blood and maintaining a normal internal or "core" temperature.
Learn more about Vasoconstriction here brainly.com/question/9823850
#SPJ4.
