Exam code: 0654 & 0973
Which of the following is a method that a doctor would suggest to a patient to reduce their risk of developing coronary heart disease?
Inserting a stent.
Coronary heart bypass surgery.
Angioplasty.
Controlled exercise.
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Which row of the table below shows the correct chambers of the heart, from those with the thinnest walls to those with the thickest?
| thinnest → thickest | ||
A | left ventricle | right ventricle | left atrium |
B | left atrium | left ventricle | right ventricle |
C | right ventricle | left atrium | left ventricle |
D | left atrium | right ventricle | left ventricle |
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Which of the following statements would be incorrect for most of the veins in the human body?
They carry blood at low pressure.
They have valves.
They have a pulse.
They return blood to the heart.
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Extended Tier Only
The blood contains lymphocytes.
What is their purpose?
Transport of hormones
Phagocytosis
Antibody production
Blood clotting
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Extended Tier Only
Which of the following is a correct explanation as to why mammals have a double circulatory system?
To reduce pressure of blood returning from the lungs to supply cells of the body most efficiently with the reactants for respiration.
To increase the pressure of blood sent to the lungs to supply cells of the body most efficiently with the reactants for respiration.
To increase the pressure of blood returning from the lungs to supply cells of the body most efficiently with the reactants for respiration.
To reduce pressure of blood sent to the lungs to supply the cells most efficiently with the products for respiration.
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Extended Tier Only
The diagram below shows a vertical section through a human heart.
Which row of the following table has the correct names for the structures labelled in the diagram?
| X | Y | Z |
A | atrioventricular valve | semilunar valve | septum |
B | semilunar valve | atrioventricular valve | septum |
C | semilunar valve | semilunar valve | atrioventricular valve |
D | atrioventricular valve | atrioventricular valve | septum |
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Extended Tier Only
The diagram below shows the human heart and some of the blood vessels associated with it.
Before blood in P reaches Q, what must it do?
Pass through capillaries
Absorb glucose
Transfer heat to the skin
Travel to the head
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The image below shows a cross-section of a blood vessel taken from an arm.
Which type of blood vessel is shown in the image, and in which direction will blood flow?
| type of vessel | direction of flow | oxygenation of blood |
A | capillary | S to T | low |
B | vein | T to S | high |
C | artery | S to T | high |
D | vein | T to S | low |
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Extended Tier Only
Some components of the blood of a mammal are shown in the image below.
Which row of the table has the correct cells from the image above assigned to their names?
| lymphocyte | phagocyte | platelets |
A | 4 | 2 | 3 |
B | 2 | 4 | 3 |
C | 1 | 2 | 1 |
D | 2 | 4 | 1 |
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Which of the following would be found dissolved in the blood plasma of a human?
Glucose, urea and hormones
Oxygen, urea and starch
Carbon dioxide, hormones and haemoglobin
Carbon dioxide, oxygen and urea
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Extended Tier Only
Which blood vessel has a relatively low carbon dioxide concentration, a high oxygen concentration and a low blood pressure?
Pulmonary artery
Pulmonary vein
Aorta
Vena cava
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Higher Tier Only
Which of the following options lists three blood vessels that carry deoxygenated blood?
aorta, pulmonary vein, renal artery
vena cava, pulmonary vein, renal vein
vena cava, pulmonary artery, renal vein
aorta, pulmonary artery, renal artery
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Extended Tier Only
Four different stages in one heartbeat are shown in the diagram below.
Which of the following depicts a correct order of stages?
W→ X → Y → Z
X → Z → W → Y
W → Y → Z → X
X → W → Y → Z
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