The stroke volume is the volume of blood pumped by each contraction of a ventricle. The ventricular end-diastolic volume is the volume of blood in the ventricle just before systole. Which graph shows the relationship between the stroke volume and the ventricular end-diastolic volume?
✓ Correct Answer
The correct answer is D: Graph showing stroke volume increasing with increasing ventricular end-diastolic volume, starting from 0 and curving upwards, then levelling off around 150 cm³.
📋 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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