Objective Questions
Each question has four choices of answers, A, B, C and D. Choose the best
answer.
MSC TUITION CENTRE 1. The trachea is kept open at all times by…
A the presence of air in it
B the presence of blood capillaries
SCIENCE FORM 3 C rings of cartilage lining its wall
D the contraction of the tracheal muscles
EARLY YEAR EXAM 2. The function of the human respiratory system is to…
A obtain carbon dioxide from the surrounding air
B transport oxygen to all part of the body
CHAPTER 1, 2 & 3 C produce new red blood cells for the body
D provide the body with oxygen for cellular respiration
3. What are the products of respiration?
A Carbon dioxide and water vapour only
B Oxygen and water vapour only
Exam questions prepared by:
Ms Alpha Manik Maling C Carbon dioxide, water vapour and energy
Bachelor In Management (Hons) (UNITAR, Malaysia) & Master In Science Human D Oxygen, water vapour and energy
Resource Development (UNIMAS, Malaysia)
February, 2010
4. During exhalation… 8. Oxygen moves from the alveoli to the capillaries through…
A the internal intercostals muscles contract A respiration C inhalation
B the diaphragm contracts and flattens B osmosis D diffusion
C the thoracic cavity is enlarged
D the pressure in the lungs is reduced 9. What is deoxygenated blood?
A Blood without oxygen
5. What is the main function of the alveoli in the lungs? B Blood rich with oxygen
A To make the lungs elastic C Blood with carbon dioxide
B To provide a large surface area for gaseous exchange D Blood rich with haemoglobin
C To supply mucus
D To ensure that the lungs do not collapse 10. Which of the following diseases is not related to the respiratory
system?
A Lung Cancer C Asthma
6. Which of the following processes take place during inhalation?
B Anemia D Emphysema
A Diaphragm flattens
B Rib cage moves upwards and inwards
11. Based on the experience of the effects of smoking on the lungs.
C Pressure in thoracic cavity increases Why is the hydrogen carbonate indicator used in this investigation?
D Volume in thoracic cavity decreases
A To purify the cigarette smoke
B To test for the presence of tar
7. Oxygen is carried by…
C To show that cigarette smoke is acidic
A red blood cells C platelets D To test for the presence of nicotine
B white blood cells D plasma
12. The harmful chemical in cigarette smoke which blackens the teeth 16. Which of the following blood vessels carries oxygenated blood into
is... the left atrium?
A nicotine C sulphur dioxide A Aorta C Pulmonary artery
B tar D carbon monoxide B Pulmonary vein D Vena cava
13. Which is the largest artery in the body? 17. What is the function of the valves in the veins and the heart?
A Pulmonary artery C Aorta A To stop substances from entering the blood
B Hepatic artery D Adrenal artery B To increase the pressure of the blood
C To prevent the backflow of blood
14. Which vein in the body is the only vein that carries oxygenated D To push the blood to the cells
blood?
A Pulmonary vein C Hepatic vein
18. A person with blood group O can receive blood from a person with
B Adrenal vein D Jagular vein blood group…
A AB C B
15. Which of the following activities increases a person’s heartbeat rate B A D O
most?
A Running up a hill
19. Which of the following components of blood is responsible for the
B Watching a horror movie clothing of blood?
C Jogging around a park A Red blood cells C White blood cells
D Stretching body muscles B Plasma D Blood platelets
20. Which part of the blood carries waste products from body tissues? 23. What is the function of the xylem?
A Red blood cells C White blood cells A To transport water from the root to the leaves
B Plasma D Blood platelets B To transport glucose from the root to the leaves
C To transport minerals from the leaves to the root
21. Why must the donor’s blood and the recipient’s blood be D To transport carbon dioxide from the leaves to the root
compatible?
A The recipient’s blood will agglutinate if not compatible
24. What is the function of the phloem?
B The blood will be diluted if not compatible
A To transport food (glucose) from leaves to all parts of the
C Red blood cells cannot carry enough oxygen if not plant
compatible
B It cools the plant
D The blood will be saturated if not compatible
C It absords water vapour
D To transport minerals from the leaves to the root
22. Which of the following conditions is not likely to affect the rate of
transpiration of a plant?
A Temperature of the surrounding air 25. Excretion is the removal of …
B Wind blowing on the plant A harmful waste products of metabolism
C Humidity of the air B unwanted products of respiration
D Colour of a plant’s leaves C undigested materials from the intestines
D urea and excress water from the kidneys
26. Which organ is not part of the excretory system?
A Heart C Lungs
B Kidneys D Skin
30. Which of the following is true about the human kidney?
27. Urea is formed in the liver from excess of… A Maintains the pH level in the body
A water C amino acids B Bread down excessive glucose
B mineral salts D glucose C Biconcave disc-shaped
D Every human has one kidney only
28. The following list shows the human excretory organs.
(i) Lungs (ii) Skin (iii) Kidney 31. The following information describes a structure of the kidney.
Which of the following excretory products is removed by these (i) Makes up about one third of the kidney
organs?
(ii) An outer and darker part of the kidney
A Urea C Water
The structure described is the…
B Carbon dioxide D Mineral salts
A pelvis C medulla
B capsule D cortex
29. The following list shows some excretory products.
(i) Urea (ii) Minerals salts (iii) Water
32. Which of the following persons will produce the most concentrated
These excretory products are removed by the… urine?
A kidneys only C kidneys and lungs A Siva drinking a bottle of alcohol
B lungs and skin D skin and kidneys B Aminah eating food high in salt content
C Ahmad drinking plenty of plain water
D Ah Meng consuming a lot of carbohydrate
33. The kidney removes wastes by… 37. Which of the following is true about the dialysis treatment?
A filtering the blood that passes through it A Blood form the vein will flow through a tube that is
immersed in a salt solution
B absorbing impurities from water
B Blood is filtered many times to ensure that waste are
C diluting the waste substances with water removed
D dissolving mineral salts in water C Water diffuses into artificial membrane and leaves the
waste products in the blood
34. Sweat does not contain… D Dialysis is a technique of dissolving same size of particles
into the salt solution
A urea C fatty acids
B water D sodium chloride
38. What are the excretory products of plants during respiration?
A Oxygen and water
35. Which of the following statements is true about the urethra?
B Carbon dioxide and water
A It carries blood for the kidney
C Oxygen and mineral salts
B It begins from the pelvis of the kidney
D Carbon dioxide only
C It is a short tube that removes urine
D It ends at the urinary bladder
39. Which plant waste product is used to make coca cola?
A Tannin C Cocaine
36. Which is the correct sequence of the flow of urine in the body?
B Quinine D Nicotine
A Kidneys, urethra, ureter, bladder
B Kidneys, ureter, bladder, urethra
40. Which plant waste product is used produce anti malaria medicine?
C Urethra, ureter, bladder, kidneys
A Tannin C Quinine
D Ureter, bladder, urethra, kidneys
B Opium D Latex
Subjective Questions
Write your answer in the spaces provided. (e) The human lungs are protected by
1. (a) Differentiate between breathing and respiration. _________________________________________________
_________________________________________________ (1 mark)
_________________________________________________ (f) State three characteristics of the alveolus to allow efficient
exchange of gases to take place.
_________________________________________________
(i) __________________________________________
_________________________________________________
__________________________________________
(2 marks)
(ii) __________________________________________
(b) What happens when a person breathes in?
__________________________________________
_________________________________________________
(iii) __________________________________________
_________________________________________________
__________________________________________
_________________________________________________
(3 marks)
_________________________________________________
(2 marks)
2. (a) State three sources of haze.
(c) What is form combines of oxygen and haemoglobin?
(i) __________________________________________
_________________________________________________
(ii) __________________________________________
(1 mark)
(2 marks)
(d) The transport the oxygen in the human body is carried out
by the… (b) State two effect of haze to human.
(i) System : (i) __________________________________________
__________________________________________ (ii) __________________________________________
(1 mark) (2 marks)
(c) Based on the experiment of the effects of cigarette smoke. (b) List the function below.
State the observation for each of the following (i) Artery
(i) Thermometer reading after the experiment __________________________________________
__________________________________________ (ii) Vein
(ii) Cotton wool before the experiment __________________________________________
__________________________________________ (iii) Capillary
(iii) Color of universal indicator after the experiment __________________________________________
__________________________________________ (3 marks)
(3 marks)
(d) Name the chemical found in cigarette smoke which (c) Name at least two blood cells that you know.
(i) reduces the amount of oxygen in the blood (i) __________________________________________
__________________________________________ (ii) __________________________________________
(ii) causes lung cancer (2 marks)
__________________________________________
(iii) causes addiction to smoking (d) State one function of the blood cells that you choose.
__________________________________________ Name of the blood cell : _____________________________
(3 marks) Function : ________________________________________
_________________________________________________
3. (a) What is the function of the heart? (2 marks)
_________________________________________________
(1 mark)
(e) Name the suitable blood group for the following recipient. (b) Name the process of water lost from the plant’s surface
during transpiration.
(i) Recipient’s blood group A
_________________________________________________
__________________________________________
_________________________________________________
(ii) Recipient’s blood group AB
(1 mark)
__________________________________________
(c) State four factors which affect the rate of transpiration.
(iii) Recipient’s blood group O
(i) _______________________________________________
__________________________________________
(ii) ______________________________________________
(iv) Recipient’s blood group B
(iii) ______________________________________________
__________________________________________
(iv)______________________________________________
(4 marks)
(4 marks)
4. (a) Define transpiration.
5. (a) What is excretion?
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________
(2 marks)
(2 marks)
(b) List down each of the excretory products removed by these (d) Explain the condition of the urine if the body has too much
organs. water.
(i) Lungs : _________________________________________________
__________________________________________ _________________________________________________
__________________________________________ (1 mark)
(ii) Skin: (e) What is the function of bladder?
__________________________________________ _________________________________________________
__________________________________________ (1 marks)
(iii) Kidneys : (f) What is the function of urethra?
__________________________________________ _________________________________________________
__________________________________________ (1 mark)
(3 marks) (g) What is the shape of the kidneys?
(c) Why excretion so important? _________________________________________________
(i) __________________________________________ (1 mark)
__________________________________________ (h) What treatment is given if a person suffers from kidney
failure?
(ii) __________________________________________
(i) __________________________________________
__________________________________________
(2 marks) (ii) __________________________________________
(2 marks)
(i) Suggest two ways to maintain healthy kidneys.
(i) __________________________________________
__________________________________________
(ii) __________________________________________
__________________________________________
(2 marks)
~ GOOD LUCK ~
6. (a) Name two gases excreted by plants.
(i) __________________________________________
(ii) __________________________________________
(2 marks)
(b) Name two processes which excrete these gases.
(i) __________________________________________
(ii) __________________________________________
(2 marks)
(c) Identify three plant excretory products which are
harmful especially when misused.
(i) __________________________________________
(ii) __________________________________________
(iii) __________________________________________
(3 marks)