Which of the following statements about temperature regulation and skin is accurate?
A) Since the skin is avascular, it is the subcutaneous layer that primarily is responsible for temperature control.
B) Arteriovenous anastomoses between an artery and a vein within the skin layer are important for temperature regulation.
C) It is primarily the arteries that bring blood from the heart that keeps the body temperature within a normal range.
D) The lymphatic system of the skin is primarily responsible for heating and cooling the skin.
Ans: B
Feedback:
The skin is richly supplied with arteriovenous anastomoses in which blood flows directly between an artery and a vein, bypassing the capillary circulation. These anastomoses are important for temperature regulation. The lymphatic system of the skin, which aids in combating certain skin infections, also is limited to the dermis.
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