BIOLOGY
HORMONES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the shortening of arterioles supplying skin surface capillaries
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the widening of arterioles supplying skin surface capillaries
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the narrowing of arterioles supplying skin surface capillaries
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All of the above
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Detailed explanation-1: -Vasoconstriction is a response to being too cold. The process involves the narrowing of blood vessels at the skin surface to reduce heat loss through the surface of the skin. Vasodilation is a response to being too hot.
Detailed explanation-2: -Vasoconstriction is the narrowing (constriction) of blood vessels by small muscles in their walls. When blood vessels constrict, blood flow is slowed or blocked.
Detailed explanation-3: -Arteries and arterioles (small arteries) have muscular walls. They’re the main blood vessels involved in vasoconstriction. Veins can also narrow. Capillaries are tiny, thin-walled blood vessels that can’t constrict.
Detailed explanation-4: -Normally, the vessels that supply blood to the skin constrict or narrow in response to cold temperatures. This reaction, called “vasoconstriction, ” decreases blood flow to the skin, which helps to minimize heat loss from the warm blood and therefore preserve a normal internal or “core” temperature.