O-LevelBiologyTransport in Humans5090/21 · May/June 2018 · Q410 Marks

The diagram shows a human heart and associated blood vessels. F A E D B C

(a)Complete the table to show which of the parts A to F contain oxygenated blood and which contain deoxygenated blood. Write each of the letters A to F in either the right or the left side of the table. contain oxygenated blood contain deoxygenated blood[2]
(b)(i)Complete the table below to show which of A to F are involved in the circulation of blood to or from each of the following locations: • the lungs, • the body tissues. Write each of the letters A to F in either the right or the left side of the table. blood to or from the lungs blood to or from the body tissues[4]
(b)(ii)Compare the pressure of blood in the circulation to the body tissues and the pressure of blood in the circulation to the lungs.[1]
(b)(iii)Explain how the structure of the heart produces this difference in blood pressure.[3]

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 (May/June 2018). The mark or mark type is shown in brackets.

[2] contain oxygenated blood A + B + C; contain deoxygenated blood D + E + F; A one or two correct letters in both boxes for 1 mark in total
[4] blood to or from the lungs any two of F + B + C ; three correct F + B + C ;; blood to or from the body tissues any two of A + D + E; three correct A + D + E ;;
[1] higher (to the body tissues) AW ;
[3] left ventricle; thicker AW; muscle; greater + contraction / force (applied to blood) AW ; ORA for right ventricle for all points

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