WAEC Biology 2025 Objective — Question 16
Question 16 of 50 from the West African Examinations Council (WAEC) Biology 2025 Objective paper, with the correct answer and a full explanation.
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The sympathetic nervous system causes
- A. Constriction of the arteriesCorrect
- B. Heartbeat to slow down
- C. Increase in the secretion of saliva
- D. Contraction of the bladder
Explanation
The sympathetic nervous system is responsible for the 'fight-or-flight' response, which prepares the body to react to stress or danger. One of its effects is vasoconstriction (constriction of blood vessels).
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