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Biology for IGCSE & O level - Transport In Animals (Section 3)

1
Which of the following chemicals is found in plasma?
Answer
(C)
Glucose
2
Which of the following substances is NOT transported by blood?
Answer
(D)
DNA
3
What type of blood cell makes antibodies?
Answer
(C)
Lymphocytes
4
What is the primary function of red blood cells?
Answer
(C)
Transporting oxygen
5
What is the function of 'fibrin' in the blood?
Answer
(B)
Helping the blood to clot
6
Which lifestyle choices can help reduce the risk of coronary heart disease (CHD)?
Answer
A
B
D
7
Which type of blood vessel carries blood at the highest pressure?
Answer
(A)
Arteries
8
What are the consequences of a thrombosis in a coronary artery?
Answer
A
B
D
9
Which of the following is a characteristic of white blood cells?
Answer
(C)
They have a nucleus.
10
What is the function of lymphocytes?
Answer
(C)
To produce antibodies
11
What is formed when oxygen combines with hemoglobin?
Answer
(B)
Oxyhaemoglobin
12
What is the function of the right ventricle?
Answer
(C)
Pumping deoxygenated blood to the lungs.
13
What is the main function of the systemic circulation?
Answer
B
C
14
What is the role of the pulmonary valve?
Answer
(B)
To prevent backflow from the pulmonary artery to the right ventricle.
15
Which of the following are the key elements of a complete ECG wave?
Answer
A
B
C
16
What is the main function of platelets?
Answer
(C)
To help in blood clotting.
17
What are some of the potential benefits of regular exercise for heart health?
Answer
A
B
C
18
In the mammalian circulatory system, the blood flows through the heart _______.
Answer
(B)
twice during a complete circulation
19
What is the role of enzymes in a food vacuole during phagocytosis?
Answer
(C)
To digest the pathogen
20
What lifestyle choice has a significant impact on the development of CHD?
Answer
(B)
Smoking
21
Which of the following is NOT a risk factor for coronary heart disease (CHD)?
Answer
(D)
Regular exercise
22
What is the relationship between exercise and the risk of CHD?
Answer
(C)
Exercise decreases the risk of CHD.
23
What is the name of the process where a white blood cell surrounds a pathogen?
Answer
(C)
Phagocytosis
24
Which of the following is a component of plasma?
Answer
C
D
25
Which part of the ECG represents ventricular depolarization?
Answer
(B)
QRS complex
26
What is the effect of smoking on the cardiovascular system?
Answer
(C)
Damages blood vessel walls
27
What are the functions of blood vessels?
Answer
A
B
C
28
What does immunity involve in terms of the body's response to a disease?
Answer
(B)
Attacking pathogens
29
Which component in the blood is responsible for the body's immune response?
Answer
(C)
White blood cells
30
What is the role of the atria in the heart?
Answer
(B)
To receive blood from the veins
31
Which component in the blood is a liquid?
Answer
(B)
Plasma
32
What is the role of the enzyme in phagocytosis?
Answer
(C)
To digest the pathogen
33
What is the purpose of the inferior vena cava?
Answer
(B)
To carry deoxygenated blood from the lower body to the heart.
34
Which part of the heart is responsible for receiving blood from the lungs?
Answer
(C)
Left atrium
35
Which structure prevents the backflow of blood from the ventricles to the atria?
Answer
(B)
Tricuspid and bicuspid valves
36
What is the name of the pigment in red blood cells that carries oxygen?
Answer
(C)
Hemoglobin
37
What is the function of the sinoatrial (SA) node?
Answer
(B)
Initiating the heart beat
38
What is the typical pulse rate range for a healthy adult at rest?
Answer
(B)
60-100 bpm
39
What is the role of the atria during the cardiac cycle?
Answer
(B)
Receiving blood from the body and lungs.
40
What happens when a pathogen enters the body and the lymphocytes recognise it?
Answer
(A)
Lymphocytes produce antibodies
41
Which blood vessel carries blood from the lungs to the heart?
Answer
(B)
Pulmonary vein
42
Which type of blood vessel has the thinnest wall?
Answer
(C)
Capillary
43
What is the main function of 'phagocytes'?
Answer
(C)
To ingest pathogens
44
Which statements are true about red blood cells?
Answer
A
C
45
Where does gas exchange occur in the lungs?
Answer
(B)
Alveoli
46
Which of the following are functions of blood?
Answer
A
B
C
47
What is the primary role of platelets?
Answer
(B)
Forming blood clots
48
What is the function of hemoglobin?
Answer
(C)
Transporting oxygen
49
What is the function of the atrioventricular valves during ventricular systole?
Answer
(B)
They close to prevent blood from flowing back into the atria.
50
What are some potential long-term health effects of untreated high blood pressure?
Answer
A
B
C