WorksheetsG10 Biology IGCSE
Total questions: 25
Worksheet time: 13mins
Which of the table below shows the correct chambers of the heart, from those with the thinnest walls to those with the thickest?
A
B
C
D
The diagram below shows a vertical section through a human heart. Which row of the following table has the correct names for the structures labeled in the diagram?
X-atrioventricular valve, Y-semilunar valve, Z- Septum
X-Semilunar valve, Y-Atrioventricular valve, Z- Septum
X- semilunar valve, Y-semilunar valve, Z- Atrioventricular valve
X-atrioventricular valve, Y-atrioventricular valve, Z- Septum
The image below shows a cross-section of a blood vessel taken from an arm. Which type of blood vessels is shown in the image, and in which direction will blood flow?
Capillary / flows from S to T / low oxygenated blood
Vein / flows from T to S / High oxygenated blood
Artery / flows from S to T / High oxygenated blood
Vein / flows from T to S / low oxygenated blood
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?
4-lymphocyte, 2-phagocyte, 3- platelets
2-lymphocyte, 4-phagocyte, 3- platelets
1-lymphocyte, 2-phagocyte, 1- platelets
2-lymphocyte, 4-phagocyte, 1- platelets
Four different stages in one heartbeat are shown in the diagram below. Which of the following depicts the correct order of stages?
W→X→Y→Z
X→Z→Y→W
W→Y→Z→X
X→W→Y→Z
Which of the following depicts the correct order of stages in the formation of a blood clot?
soluble fibrin → insoluble fibrinogen → blood clot
soluble fibrinogen → insoluble fibrin → blood clot
insoluble fibrin → soluble fibrinogen → blood clot
insoluble fibrinogen → soluble fibrin → blood clot
What makes the alveoli suitable as a gas exchange surface in mammals?
A
B
C
D
Some amphibians, such as frogs, can use their skin as a gas exchange surface. what are the most likely characteristics of the surface of the skin in these amphibians?
A
B
C
D
When the diaphragm relaxes and internal intercostal muscles contract, how does the volume and pressure inside the thorax change? points: 3
A
B
C
D
The diagram shows the composition of four samples of air (O2 = oxygen, CO2 = carbon dioxide, N2 = nitrogen). Which sample is inspired air and which sample is expired air?
inspired air- R,
expired air - S
inspired air- P,
expired air - R
inspired air- Q,
expired air - P
inspired air- S,
expired air - R
Which of the following correctly describes the actions of the intercostal muscles and the diaphragm when we breathe in?
A
B
C
D
The diagram shows part of the structure of a human lung. Where would the concentration of carbon dioxide be highest?
A
B
C
D
The diagram below illustrates the changes in air pressure taking place inside the lungs during a complete cycle of breathing. Atmospheric pressure is 101 kPa. At which point on the diagram does the process of inhalation start?
A
B
C
D
The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30 seconds. Which graph below shows the changes in the volume of air in the lungs for the same person immediately after they have done a few minutes of vigorous exercise?
The image below shows a simple reflex arc. Which of the following sequences correctly shows the order of cells that an impulse passes through during a reflex action?
Z → X → Y
X → Y
→ Z
Y → X → Z
Z → Y → X
The image below shows some of the structures in the eye. The circular and radial muscles can control the size of the pupil in the eye. How would they respond in the eye of a person walking from a brightly lit room into a dark one?
radial muscles- relaxes, circular muscles - contracts, pupil - constricts
radial muscles- relaxes, circular muscles - contracts, pupil - dilated
radial muscles- contracts, circular muscles - relaxes, pupil - dilated
radial muscles- contracts, circular muscles - relaxes, pupil - constricts
Which row of the following table correctly describes what happens in the body after a person consumes a can of sugary drink?
A
B
C
D
The image below shows a cell from the nervous system. The cell forms part of a reflex arc. An electric impulse moves along the neuron from Q to P. What structures would be found at P and Q?
A-Receptor
B-Relay Neurone
A-Relay Neurone
B-Receptor
A-Motor Neurone
B-Relay Neurone
A-Gland
B-Relay Neurone
The image below shows the structures involved in a simple reflex arc. Which of the following sequence correctly shows the order that an impulse passes through during a reflex action?
S → U → V → T
S → T
→ U → V
S → V
→ U
→ T
T
→ V
→ U
→ S
The image below shows some cells found in the trachea. What is the function of the part labeled K?
increasing surface area
gas exchange
pushing mucus
trapping bacteria
The diagram below shows a cross-section through an alveolus and a capillary. Why does oxygen move from P to Q?
There is an equal concentration of gases between point P and point Q
The concentration of oxygen in the blood is lower than in the air in the capillary
Oxygen must replace carbon dioxide.
The concentration of oxygen in the blood is lower than the air in the alveolus.
Which of the following list do all three blood vessels 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
Which blood vessel has a relatively low carbon dioxide concentration, high oxygen concentrations, and low blood pressure?
Pulmonary artery
Pulmonary veins
Aorta
Vena cava
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 into a coronary artery.
Coronary heart bypass surgery.
Angioplasty.
Controlled exercise.
Which of the following is a correct explanation as to why mammals have a double circulatory system?
To reduce pressure to 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 reactants for respiration.
To reduce pressure of blood sent to the lungs to supply the cells most efficiently with the products for respiration
