WAEC Biology 2009 Objective — Question 16
Question 16 of 60 from the West African Examinations Council (WAEC) Biology 2009 Objective paper, with the correct answer and a full explanation.
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The organ that receives reduced flow of blood during vigorous exercise except
- A. A. the brainCorrect
- B. B. heart
- C. C. lung
- D. D. limb
Explanation
During exercise, the heart rate increases, which increases the flow of blood to the brain. The brain is the one organ whose blood flow cannot be reduced, since there must be a constant supply of blood to it to provide sufficient oxygen; blood flow to the limbs, lungs and skin is adjusted to support increased muscular activity.
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