WAEC Biology 2009 Objective — Question 13
Question 13 of 60 from the West African Examinations Council (WAEC) Biology 2009 Objective paper, with the correct answer and a full explanation.
Advertisement
A pulse is best described as A. contraction of arteries to allow blood into them B. constriction of veins to allow blood into them C. dilation of arteries to accommodate blood D. pumping action of the heart to move blood round the body
- A. A. contraction of arteries to allow blood into them
- B. B. constriction of veins to allow blood into them
- C. C. dilation of arteries to accommodate bloodCorrect
- D. D. pumping action of the heart to move blood round the body
Explanation
Since the heart pumps blood at high force, the arteries have to dilate sufficiently to accommodate the blood rushing through - the sound produced by this is known as the pulse.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.