A-LevelBiologyTransport in mammalsOct/Nov 2018Paper 1 Q291 Mark
What describes the role of the atrio-ventricular node of the heart?
AIt causes the muscles of the ventricles to contract from the apex upwards.
BIt delays the transmission of a wave of electrical activity from the sinoatrial node.
CIt initiates a new wave of electrical activity in the ventricles.
DIt provides a non-conducting barrier between the atria and the ventricles.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of transport in mammals within the Biologysyllabus. The examiner's mark scheme requires...
📋 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...
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