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GCE Biology 1990 Question 24

Question 24

Homeostasis

The increase in width of blood vessels in the mammalian skin at high temperatures is known as

  1. A.vasolidation
  2. B.sweating
  3. C.vasoconstriction
  4. D.shivering
  5. E.evaporation
Show the answer and explanation

Answer: A (vasolidation)

Explanation

Widening of skin blood vessels (vasodilation) brings blood to the surface to lose heat.