So theres a questoin on AAMC 9 asking which of hte following is common to arteries, veins and capillaries.. The correct answer is that all of these vessels are lined with endothelial cells. that's fine, but just curious to know more about the answer choice that says ability to actively dilate or constrict regulating blood flow.. According to the explanation only arteries have thick muscular walls capable of vasodilation/vasoconstriction.. however wiki says "Vasodilation refers to the widening of blood vessels[1] resulting from relaxation of smooth muscle cells within the vessel walls, particularly in the large arteries, smaller arterioles and large veins"
So veins ARE or ARE NOT capable of vasodilation or vasoconstriction?!
Thanks!
So veins ARE or ARE NOT capable of vasodilation or vasoconstriction?!
Thanks!