WAEC Biology 2015 Objective — Question 15
Question 15 of 50 from the West African Examinations Council (WAEC) Biology 2015 Objective paper, with the correct answer and a full explanation.
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Blood pressure is higher in the arteries as a result of
- A. stress
- B. contraction and relaxationCorrect
- C. blockage in the arteries
- D. pressure of valves
Explanation
The contraction and relaxation of the heart (and arterial walls) are responsible for the higher blood pressure found in the arteries.
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