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O-LevelBiologyTransport in Humans5090/11 · May/June 2012 · Q141 Mark

Which row in the table describes the features of the pulmonary vein?

Ablood: deoxygenated, lumen: narrow, muscle layer: thin
Bblood: deoxygenated, lumen: wide, muscle layer: thick
Cblood: oxygenated, lumen: narrow, muscle layer: thick
Dblood: oxygenated, lumen: wide, muscle layer: thin

✓ Correct answer

D: blood: oxygenated, lumen: wide, muscle layer: thin

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About this question

Topic
Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2012 Paper 1 Variant 1, question 14.

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