HISTOLOGY
INTEGUMENTARY SYSTEM SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The blood vessels in your skin constrict, reducing blood flow to cool the body
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The blood vessels constrict to increase blood flow to cool the body
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The blood vessels dilate to increase blood flow to the skin
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The blood vessels dilate to decrease blood flow to the skin
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Detailed explanation-1: -Blush or turn red: Ever notice how your face feels hot when you turn red out of embarrassment? That’s because of vasodilation of the blood vessels right under the surface of your skin (called capillaries), which increases blood flow to your face.
Detailed explanation-2: -Vasodilation occurs naturally in your body in response to triggers such as low oxygen levels, a decrease in available nutrients, and increases in temperature. It causes the widening of your blood vessels, which in turn increases blood flow and lowers blood pressure.
Detailed explanation-3: -The blood vessels are dilated so more blood flows near and at the surface of your body to allow heat to be lost to the air. The smallest blood vessels, the capillaries, also dilate and this makes your skin feel warm to the touch. The blood vessels will narrow again when the body temperature is back to normal.
Detailed explanation-4: -When blood vessels dilate, the flow of blood is increased due to a decrease in vascular resistance and increase in cardiac output. Therefore, dilation of arterial blood vessels (mainly the arterioles) decreases blood pressure.