IB Biology SL B3.2.2 Artery and Vein Structure Questions

Explore how artery and vein wall layers, lumen size, elastic tissue and valves support high-pressure output and low-pressure venous return in IB Biology SL B3.2.2.

Exam points

Distinguish arteries from veins using visible wall thickness, lumen size, elastic or muscle layers and valves.
Explain how artery walls withstand high pressure with thicker muscle, elastic tissue, collagen and smaller lumens, whereas veins return blood at lower pressure through wider lumens and thinner walls.
Use vessel diagrams, micrographs or pressure data to relate valves and wall structure to one-way venous flow and arterial pressure maintenance.

Learn this topic

Study B3.2.2—Artery and vein structure conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

[Maximum number: 1]

The diagram shows a cross section through an artery and a vein.

Figure for Question IB Biology SL B3.2.2 Artery and Vein Structure Questions question 1 — IB Biology SL

Identify which of the two labelled blood vessels is the artery, giving a reason for your answer.

All question bank results loaded

a	X as it has muscular/thicker walls;
b	X as it has a smaller lumen (than Y);

Learn this topic

IB Biology SL B3.2.2 Artery and Vein Structure Questions question 1