As blood flows from an artery to a vein, the thickness of the walls of the vessels changes. Which bar chart shows these changes correctly? [Figure 34.1]
✓ Correct Answer
The correct answer is D: Graph D: Arterial wall thickness is highest for artery, then vein, then arteriole, then venule, with capillary being thinnest
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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