A-LevelBiologyTransport in mammals9700/23 · Oct/Nov 2017 · Q210 Marks
Fig. 2.1 shows the heart and blood vessels at three stages of the cardiac cycle. [Figure 2.1]
- (a)Explain why the wall of the left ventricle in the heart is thicker than the wall of the right ventricle.[2]
- (b)(i)Name the blood vessels labelled F and G. F G[2]
- (b)(ii)Name the stage of the cardiac cycle at K.[1]
- (c)Describe what happens in the heart between stages H and J as shown in Fig. 2.1.[5]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.
- [1] to generate a high(er) blood pressure (during systole) ; A force I withstands/AW, high blood pressure
- [1] to overcome high(er) resistance (in systemic circuit than in pulmonary circuit);
- [1] to transport blood a greater distance/greater distance in systemic circuit ;
- [1] ref. to right ventricle generating low pressure to avoid damaging (capillaries in the) lungs/AW;
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