A-LevelBiologyTransport in mammalsOct/Nov 2019Paper 2 Q414 Marks
In mammals, arteries branch to form smaller blood vessels called arterioles. Arterioles branch to form capillaries that supply blood to tissues. Fig. 4.1 shows transmission electron micrographs of cross-sections through an arteriole and a capillary. Fig. 4.2 shows a capillary network in a mammalian tissue. The arrows indicate the direction of flow of body fluids.
📋 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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