The diagram shows pressure changes in the aorta, left atrium and left ventricle during a cardiac cycle. [Figure 24] Which row explains the changes in the left ventricle at different times on the graph?
✓ Correct Answer
The correct answer is A: region of graph: between 1 and 2, muscles of ventricle wall: contract, volume of left ventricle: remains constant
📋 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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