A-LevelBiologyTransport in mammals9700/12 · May/June 2012 · Q301 Mark
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?
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AGraph showing stroke volume constant at 100 cm³ regardless of ventricular end-diastolic volume.
BGraph showing stroke volume decreasing linearly from 200 cm³ to 0 cm³ as ventricular end-diastolic volume increases from 0 cm³ to 200 cm³.
CGraph showing stroke volume increasing linearly from 0 cm³ to 200 cm³ as ventricular end-diastolic volume increases from 0 cm³ to 200 cm³.
DGraph showing stroke volume increasing with increasing ventricular end-diastolic volume, starting from 0 and curving upwards, then levelling off around 150 cm³.
✓ Correct answer
D: Graph showing stroke volume increasing with increasing ventricular end-diastolic volume, starting from 0 and curving upwards, then levelling off around 150 cm³.
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