NURSING EXAM QUESTIONS
HUMAN ANATOMY PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Dilate to make the blood vessels smaller so blood can flow faster
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Constrict to make the blood vessels smaller so blood can stay close to core
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Either A or B
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None of the above
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Detailed explanation-1: -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.
Detailed explanation-2: -The skin’s immense blood supply helps regulate temperature: dilated vessels allow for heat loss, while constricted vessels retain heat. The skin regulates body temperature with its blood supply.
Detailed explanation-3: -The circulatory system helps in thermoregulation by vasoconstriction and vasodilation of blood vessels. Thermoregulation is the regulation of heat dissipation from the body. When the body is hot sweat is released from the skin, and when cold less sweat is released from the skin, so less heat energy is lost.