A Levels Biology (9700)•9700/13/O/N/23

Explanation
Matching blood vessels to circulatory functions and damage effects
Steps:
- Identify vessel responsible for distributing blood to specific organs: muscular artery, via smooth muscle control.
- Identify vessel that absorbs blood surges from ventricular ejection: elastic artery, through elastic recoil.
- Identify vessel that helps maintain relatively constant blood pressure: muscular artery, by regulating peripheral resistance.
- Match sequence to options: muscular artery, elastic artery, muscular artery corresponds to D.
Why D is correct:
- Muscular arteries distribute blood and regulate pressure via vasoconstriction/dilation (Starling's law of capillaries ties to resistance control); elastic arteries dampen surges per their elastin content.
Why the others are wrong:
- A: Elastic artery first mismatches distribution role—elastic arteries conduct from heart, not target organs.
- B: Vein second mismatches surge handling—veins lack elasticity for pressure buffering.
- C: Vein second and muscular third swap surge and pressure roles—veins return blood passively, not regulate.
Final answer: D
Topic: The circulatory system
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