Heart — Paper 2 · IGCSE Biology (9-1) 0970

17 The diagram shows a circulatory system. 2 3 capillaries of capillaries of the the lungs heart rest of the body 1 4 Which vessels carry oxygenated blood? A 1 and 2 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2018

18 What happens to the heart valves when the ventricles contract? atrioventricular semilunar valves valves A valves close valves close B valves close valves open C valves open valves close D valves open valves open

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2018

17 Which factor increases the risk of developing coronary heart disease? A low fat diet B regular exercise C relaxation D smoking

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2019

18 The diagram shows a section through the heart and its blood vessels. X Which row gives the vessel name and the direction of blood flow in vessel X? vessel name direction of blood flow A aorta towards the lungs B pulmonary artery towards the lungs C pulmonary artery away from the lungs D vena cava away from the lungs

1 marks

Answer: B

This question in 0970/21 May/June 2020

17 The diagrams show the single circulation of a fish and the double circulation of a mammal. gill capillaries lung capillaries X R Y S ventricle atria atrium ventricles T Z body capillaries body capillaries fish circulation mammal circulation Which letters represent areas of oxygenated blood? A R and X B S and Y C T and Y D T and Z

1 marks

Answer: B

This question in 0970/22 May/June 2020

18 The diagram shows the human heart and main blood vessels. lungs X rest of body What is the blood vessel labelled X? A aorta B pulmonary artery C pulmonary vein D vena cava

1 marks

Answer: C

This question in 0970/22 May/June 2020

17 What ensures that blood flows in one direction in the human circulatory system? A diffusion of carbon dioxide B diffusion of oxygen C thick walled arteries D valves

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2020

19 How does blood enter the heart? A through arteries into the atria B through arteries into the ventricles C through veins into the atria D through veins into the ventricles

1 marks

Answer: C

This question in 0970/22 May/June 2021

17 The diagram shows the circulatory system of a fish. X gills heart Y body Z Where in the circulatory system is the oxygen concentration lowest? A X only B X and Y C Y only D Y and Z

1 marks

Answer: A

This question in 0970/21 May/June 2022

17 People are sometimes born with a ‘hole in the heart’. This is caused by a gap in the septum, as shown. key direction of blood flow If the gap in the septum is not repaired, it causes the person to become breathless more quickly. What is a possible explanation for this? A Deoxygenated blood in the left atrium mixes with oxygenated blood from the right atrium. B Deoxygenated blood in the right atrium mixes with oxygenated blood from the left atrium. C Oxygenated blood in the left ventricle mixes with deoxygenated blood from the right ventricle. D Oxygenated blood in the right ventricle mixes with deoxygenated blood from the left ventricle.

1 marks

Answer: C

This question in 0970/22 May/June 2022

24 Which effects does adrenaline have on blood glucose concentration and pulse rate? blood glucose pulse rate concentration A increases reduces B increases increases C reduces reduces D reduces increases

1 marks

Answer: B

This question in 0970/22 May/June 2022

17 The diagram shows the outside of a human heart. Which structure is a coronary artery? B A C D

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2022

17 Which statements describe how the structures in the circulatory system function? 1 a muscular pump to push blood into vessels 2 valves to ensure one-way blood flow 3 veins to take blood away from the heart 4 vessels to return blood to the heart A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4

1 marks

Answer: B

This question in 0970/21 May/June 2023

18 The diagram shows a section through the heart. Which part is the septum? B C A D

1 marks

Answer: C

This question in 0970/21 May/June 2023

17 The diagram shows the human heart. Which label shows the left ventricle? D A B C

1 marks

Answer: B

This question in 0970/22 May/June 2023

20 The diagram shows the external structure of the human heart. Which part is blocked in coronary heart disease? D A B C

1 marks

Answer: B

This question in 0970/21 May/June 2024

18 The diagram shows the circulatory system of a fish. X key oxygenated blood deoxygenated blood direction of blood flow What is the structure labelled X? A aorta B gills C heart D vena cava

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2024

19 Which factors increase the risk of developing coronary heart disease? 1 increased age 2 regular exercise 3 smoking 4 stress A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2024

23 The diagram shows the positions of two endocrine glands in the human body. endocrine glands kidneys What is a response of the body to the hormone released from these glands? A a decrease in heart rate B a decrease in blood glucose concentration C an increase in pupil diameter D the development of secondary sexual characteristics

1 marks

Answer: C

This question in 0970/21 May/June 2025

16 What is an advantage of a double circulatory system? A It allows the mixing of oxygenated and deoxygenated blood. B It can keep blood pressure high in the lungs. C Less carbon dioxide is removed from the body cells. D Oxygen is supplied to body cells by blood at high pressure.

1 marks

Answer: D

This question in 0970/22 May/June 2025

17 Which structure in the heart separates oxygenated and deoxygenated blood? A atrioventricular valve B muscle wall of left atrium C semilunar valve D septum

1 marks

Answer: D

This question in 0970/22 May/June 2025

20 Which effect does adrenaline have on blood glucose concentration and pulse rate? blood glucose pulse rate concentration A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2025