O-LevelBiologyTransport in Humans5090/12 · May/June 2015 · Q151 Mark

The diagram shows the liver and its blood supply. [Diagram] What is the name of blood vessel X, and which substance increases in concentration between vessel W and vessel X?

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Ahepatic artery, carbon dioxide

Bhepatic portal vein, carbon dioxide

Chepatic artery, oxygen

Dhepatic portal vein, oxygen

✓ Correct answer

B: hepatic portal vein, carbon dioxide

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2015 Paper 1 Variant 2, question 15.

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