MCAT Biology Question 105: Answer and Explanation
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Question: 105
15. Which vascular structure creates the most resistance to blood flow?
- A. Aorta
- B. Arterioles
- C. Capillaries
- D. Veins
Correct Answer: B
Explanation:
The greatest amount of resistance is provided by the arterioles, which also results in the greatest drop in blood pressure. Arterioles are highly muscular and have the ability to contract and dilate in order to affect blood pressure.