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WAEC Biology 2025 Question 36

Question 36

Nervous Coordination

The sympathetic nervous system causes

  1. A.increase in the secretion of saliva
  2. B.contraction of the bladder.
  3. C.constriction of the arteries.
  4. D.heartbeat to slow down.
Show the answer and explanation

Answer: C (constriction of the arteries.)

Explanation

The sympathetic system prepares the body for action: it narrows arteries to the skin and gut and speeds the heart. The other effects are parasympathetic.