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WAEC Biology 2001 Question 23

Question 23

Homeostasis

Which of the following processes occurs when the body temperature of a mammal rises above the normal?
I. The arterioles in the skin dilate. II. Sweat production is reduced. III. The erector muscles contract.

  1. A.I only
  2. B.II only
  3. C.I and III only
  4. D.II and III only
Show the answer and explanation

Answer: A (I only)

Explanation

When the body is too hot, skin arterioles dilate to lose heat; sweating increases (not reduces) and the erector muscles relax.