Transport in mammals: past paper questions
Real questions on transport in mammals
The newest 20 of 96 written questions, plus 150 multiple-choice. Open one to see it on the real paper.
- 9700/22 · October/November 2025 · Q6a[5]
Describe the sequence of events occurring in the heart that allows blood returning in the pulmonary circulation to then enter the systemic circulation. You should include in your description: • • the names of the relevant blood vessels of the pulmonary circulation and systemic circulation that are connected to the hear...
See it on the paper → - 9700/23 · October/November 2025 · Q6a[4]
A student studied the structure of a mammalian heart. The student took a photograph of the left side of a dissected heart as shown in Fig. 6.1. Fig. 6.1 Identify two features of the left side of the heart visible in Fig. 6.1 and explain how each feature is adapted to the function of the heart. feature explanation featu...
See it on the paper → - 9700/23 · October/November 2025 · Q6b[4]
Cardiac muscle is described as myogenic. This means the electrical activity controlling the rhythm of a regular heartbeat begins within the muscle tissue of the heart. Describe how electrical activity within the heart controls each heartbeat.
See it on the paper → - 9700/23 · October/November 2025 · Q6c(i)[2]
Describe two functions of tissue fluid.
See it on the paper → - 9700/23 · October/November 2025 · Q6c(ii)[3]
With reference to Fig. 6.2, describe how tissue fluid is formed.
See it on the paper → - 9700/42 · October/November 2025 · Q8c(i)[2]
Complete Table 8.1.
See it on the paper → - 9700/43 · October/November 2025 · Q9a[2]
Fig. 9.1 shows a longitudinal section of a human kidney. X Y Fig. 9.1 X Name the regions of the kidney labelled X and Y in Fig. 9.1.
See it on the paper → - 9700/21 · May/June 2025 · Q6b(v)[2]
Explain the advantage to the mammal of the effect you described in part (iii). The boundaries and names shown, the designations used and the presentation of material on any maps contained in this question paper/insert do not imply official endorsement or acceptance by Cambridge Assessment International Education concer...
See it on the paper → - 9700/23 · May/June 2025 · Q6c[3]
Coronary arteries supply oxygenated blood to the cells of the heart. The passage outlines the cardiac cycle of the heart and the structures in the heart that control the cycle. Complete the passage by using the most appropriate scientific terms. The sinoatrial node is located in the wall of the , one of four chambers o...
See it on the paper → - 9700/22 · February/March 2025 · Q3a(i)[1]
Name the valve labelled V on Fig. 3.1.
See it on the paper → - 9700/22 · February/March 2025 · Q3a(ii)[2]
With reference to the chambers of the heart and the main blood vessels, describe the flow of blood through the heart that occurs when the transverse section of the heart appears as shown in Fig. 3.1.
See it on the paper → - 9700/22 · February/March 2025 · Q3b[2]
Give a reason for your answer. stage of cardiac cycle reason (b) Identify the stage of the cardiac cycle shown in Fig. 3.2.
See it on the paper → - 9700/22 · February/March 2025 · Q3c[3]
The rate and rhythm of the heartbeat are controlled by an area of specialised muscle tissue in the wall of the right atrium, called the sinoatrial node. Describe the sequence of events that control contraction of the ventricles during the cardiac cycle.
See it on the paper → - 9700/21 · October/November 2024 · Q2c(i)[2]
Draw a line on Fig. 2.4 to suggest the position of the oxygen dissociation curve for penguin haemoglobin. (i) 100 90 70 60 percentage saturation of haemoglobin with oxygen 50 40 30 20 80 10 0 0 2 4 6 8 10 partial pressure of oxygen / kPa 12 14 Fig. 2.4
See it on the paper → - 9700/21 · October/November 2024 · Q2c(ii)[3]
Penguin haemoglobin is very sensitive to a decrease in pH caused by an increase in the carbon dioxide concentration in the blood. Explain how a decrease in pH affects penguin haemoglobin, and suggest how this helps the penguin to swim underwater for a long time.
See it on the paper → - 9700/21 · October/November 2024 · Q2d[1]
Heart rate is regulated by a group of specialised cells in the wall of the right atrium. The activity of these cells is modified by nerve impulses. Name the group of specialised cells in the wall of the right atrium that regulates heart rate. (d) The heart rate of a penguin decreases while it is swimming underwater.
See it on the paper → - 9700/23 · October/November 2024 · Q1b[5]
There is a regular and efficient supply of blood from the heart to the lungs. Describe the sequence of events that occurs in the heart to make sure that there is a regular and efficient supply of blood to the lungs. Question 2 starts on page 6
See it on the paper → - 9700/21 · May/June 2024 · Q2b(i)[1]
Complete Fig. 2.1 by naming P and Q. Write your answers on Fig. 2.1.
See it on the paper → - 9700/21 · May/June 2024 · Q2b(ii)[2]
Describe the functions of P and Q.
See it on the paper → - 9700/21 · May/June 2024 · Q2b(iii)[2]
Explain why the mammalian circulation is described as a closed, double circulation.
See it on the paper →
What examiners said
Many responses recognised that valve V was a semilunar valve or the aortic valve.
— Examiner report, February/March 2025, 9700/22 Q3(a)(i) (Cambridge)
The most effective responses were limited to descriptions of the flow of blood through the heart at the stage shown in Fig. 3.1. A proportion of responses included explanations of what was happening, rather than descriptions, which was not required. Some responses referred to the atrium and the ventricle, rather than atria and ventricles, which did not convey a complete understanding of the flow o...
— Examiner report, February/March 2025, 9700/22 Q3(a)(ii) (Cambridge)
Many candidates knew the stage of the cardiac cycle shown in Fig. 3.2 and went on to give a correct reason related either to the closed atrioventricular valves or the open semilunar valves.
— Examiner report, February/March 2025, 9700/22 Q3(b) (Cambridge)
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