SUKHOI ACADEMY

Candidate’s Name _____________________________________________________________

Class _______________________________ Section _________________________________
Date: - Topic: respiration By: Nitish Sir
a) Diaphragm b) Heart
1. What is the primary organ responsible for c) Stomach d) Liver
respiration in human beings?
11. What is the chemical equation for cellular
a) Heart b) Lungs
c) Stomach d) Brain respiration?
2. During inhalation, which gas is taken into the body?
a) Oxygen + Glucose → Water + Energy
a) Carbon dioxide b) Oxygen
c) Nitrogen d) Helium b) Carbon dioxide + Water → Oxygen + Energy
3. What is the waste gas exhaled during respiration? c) Glucose + Oxygen → Carbon dioxide + Water
a) Oxygen b) Hydrogen
c) Carbon dioxide d) Methane + Energy
4. What is the process of breaking down food to d) Water + Energy → Carbon dioxide + Glucose
release energy called? 12. What type of respiration occurs in the absence of
a) Photosynthesis b) Respiration oxygen?
c) Digestion d) Circulation a) Aerobic respiration b) Cellular respiration
5. Where does the exchange of gases take place in the c) Anaerobic respiration d) Photosynthesis
lungs? 13. Which structure carries oxygen-rich blood to all parts
a) Bronchi b) Alveoli of the body?
c) Trachea d) Diaphragm a) Arteries b) Veins
6. What is the role of hemoglobin in respiration? c) Nerves d) Capillaries
a) To carry nutrients 14. What happens to the ribs during inhalation?
b) To carry oxygen a) Move inward b) Move outward
c) To break down food c) Stay stationary d) Move downward
d) To pump blood 15. What substance is produced in muscles during
7. What separates the chest cavity from the abdominal vigorous exercise due to anaerobic respiration?
cavity? a) Alcohol b) Carbon dioxide
a) Lungs b) Ribs c) Lactic acid d) Oxygen
c) Diaphragm d) Spine 16. Which of the following is a characteristic of aerobic
8. Which part of the respiratory system is also known respiration?
as the windpipe? a) Takes place without oxygen
a) Esophagus b) Bronchi b) Produces a large amount of energy
c) Trachea d) Larynx c) Occurs in the stomach
9. What is the tiny hair-like structure in the nasal cavity d) Produces alcohol
called? 17. What is the purpose of the epiglottis?
a) Alveoli b) Cilia a) To produce sound
c) Bronchioles d) Diaphragm b) To filter air
10. Which muscle helps in breathing by contracting and c) To prevent food from entering the windpipe
relaxing? d) To exchange gases
18. Which part of the respiratory system divides into d) Nose → Alveoli → Bronchi → Trachea →
two bronchi?
a) Trachea b) Alveoli Bronchioles
c) Larynx d) Nasal cavity 27. What prevents the lungs from collapsing?
19. What surrounds the alveoli to allow gas exchange? a) Rib cage b) Pleural fluid
a) Capillaries b) Muscles c) Diaphragm d) Alveoli
c) Bronchi d) Cartilage 28. How does oxygen enter the blood from the alveoli?
20. What is the normal breathing rate of an adult at a) Diffusion b) Osmosis
rest? c) Filtration d) Active transport
a) 10-15 breaths per minute 29. What is the main function of the respiratory system?
b) 12-20 breaths per minute a) To digest food
c) 20-30 breaths per minute b) To circulate blood
d) 30-40 breaths per minute c) To transport oxygen and remove carbon dioxide
21. Which gas is essential for breaking down glucose to d) To regulate body temperature
produce energy? 30. Which organ filters and humidifies the air we
a) Nitrogen b) Oxygen breathe?
c) Hydrogen d) Carbon dioxide a) Lungs b) Trachea
22. What happens to the diaphragm during exhalation? c) Nasal cavity d) Bronchi
a) Contracts and moves downward 31. Which type of blood vessel surrounds the alveoli for
b) Relaxes and moves upward gas exchange?
c) Expands and stays flat a) Arteries b) Veins
d) Becomes rigid c) Capillaries d) Bronchioles
23. Which organ system works closely with the 32. What happens to the amount of carbon dioxide in
respiratory system to transport oxygen? the blood during heavy exercise?
a) Digestive system b) Circulatory system a) It decreases b) It remains the same
c) Nervous system d) Skeletal system c) It increases d) It stops completely
24. What is the term for the tiny air sacs in the lungs? 33. What is the term for the amount of air taken in or
a) Bronchioles b) Trachea released in a single breath?
c) Alveoli d) Capillaries a) Residual volume b) Tidal volume
25. What is the first step in the process of respiration? c) Vital capacity d) Total lung capacity
a) Exchange of gases in the alveoli 34. Which of the following increases during inhalation?
b) Inhalation of oxygen a) Lung volume
c) Transport of oxygen by blood b) Carbon dioxide levels
d) Release of energy in cells c) Air pressure in the lungs
d) Diaphragm thickness
26. Which of the following is the correct pathway of
35. What controls the rate of breathing in humans?
air during inhalation? a) Heart b) Brainstem
a) Nose → Trachea → Alveoli → Bronchi → Lungs c) Spinal cord d) Lungs
36. What is the primary function of cilia in the
b) Nose → Trachea → Bronchi → Bronchioles → respiratory system?
Alveoli a) To trap and remove dust particles
b) To increase the surface area for gas exchange
c) Nose → Bronchi → Bronchioles → Trachea →
c) To produce mucus
Alveoli d) To carry oxygen
37. Why is the inner surface of the alveoli moist? a) The heart b) The rib cage
a) To dissolve gases for easier diffusion c) The stomach d) The diaphragm
b) To prevent the lungs from drying out 46. What role does mucus play in the respiratory system?
c) To increase lung capacity a) To filter oxygen
d) To produce energy b) To trap dust and microbes
38. What happens to oxygen after it diffuses into the c) To strengthen the lungs
blood? d) To absorb carbon dioxide
a) It forms water molecules 47. What is the term for the exchange of gases between
the blood and the cells?
b) It binds with hemoglobin in red blood cells
a) External respiration b) Cellular respiration
c) It is converted into carbon dioxide
c) Internal respiration d) Aerobic respiration
d) It is stored in the lungs
48. What happens if the diaphragm is paralyzed?
39. Which of these activities is an example of aerobic
a) Breathing becomes difficult
respiration?
b) Heart rate increases
a) Running a marathon
c) Lungs collapse
b) Holding your breath
d) Blood circulation stops
c) Fermentation in yeast
49. Which component of the respiratory system prevents
d) Vigorous exercise producing lactic acid
food from entering the windpipe?
40. Which gas contributes to the "breathlessness" feeling
a) Trachea b) Epiglottis
after exercise?
c) Larynx d) Bronchi
a) Oxygen b) Nitrogen
50. Which of these best describes respiration?
c) Carbon dioxide d) Helium
a) Intake of food and water
41. What causes the lungs to expand during inhalation?
b) Exchange of gases to release energy
a) Increase in chest cavity volume
c) Removal of waste from the body
b) Decrease in diaphragm activity
d) Circulation of blood in the body
c) Increase in alveoli size
51. What happens to carbon dioxide in the blood during
d) Contraction of lung muscles
exhalation?
42. What happens to the oxygen carried by blood when it
reaches the cells? a) It is converted into oxygen
a) It is exhaled b) It is transported to the lungs for removal
b) It combines with glucose to release energy c) It remains in the blood
c) It forms proteins d) It is stored in the muscles
d) It converts into water 52. What structure in the respiratory system is responsible
43. Which of the following is not a part of the human for producing sound?
respiratory system? a) Trachea b) Larynx
a) Trachea b) Bronchi c) Bronchi d) Alveoli
c) Esophagus d) Larynx 53. Which process involves the release of energy by
44. Why does breathing rate increase during physical breaking down glucose?
activity? a) Exhalation b) Inhalation
a) To cool the body down c) Respiration d) Digestion
b) To supply more oxygen to the muscles 54. What is the name of the tiny openings in the nasal
c) To remove nitrogen from the blood cavity?
d) To stop the production of lactic acid a) Alveoli b) Bronchioles
45. What protects the lungs from damage during c) Nostrils d) Capillaries
breathing? 55. What is the primary difference between inhaled and
exhaled air?
 a) Inhaled air contains more carbon dioxide b) It is broken down to release energy
b) Exhaled air contains more oxygen c) It is converted into proteins
c) Inhaled air contains more oxygen d) It is exhaled from the body
d) Exhaled air contains less nitrogen 67. Which part of the respiratory system is also involved in
56. What prevents the trachea from collapsing? the digestive system?
a) Cartilage rings b) Diaphragm a) Trachea b) Esophagus
c) Muscles d) Pleural fluid c) Pharynx d) Alveoli
57. What is the approximate percentage of oxygen in the 68. What is the main function of oxygen in the body?
air we breathe? a) To break down proteins
a) 50% b) 21% c) 10% d) 78% b) To produce energy
58. What is the role of the bronchial tubes? c) To form blood cells
a) To store oxygen d) To digest food
b) To carry air into the lungs 69. What is the condition in which the alveoli are
c) To filter blood damaged, causing breathing difficulties?
d) To absorb carbon dioxide a) Bronchitis b) Emphysema
59. What triggers the breathing process in the brain? c) Pneumonia d) Tuberculosis
a) Decrease in nitrogen levels 70. What happens to the pressure in the chest cavity
b) Increase in oxygen levels during exhalation?
c) Increase in carbon dioxide levels a) It increases b) It decreases
d) Decrease in energy levels c) It remains constant d) It fluctuates rapidly
60. What happens to the intercostal muscles during 71. Which process releases carbon dioxide into the
inhalation? atmosphere?
a) They relax b) They contract a) Photosynthesis b) Cellular respiration
c) They stop functioning d) They remain unchanged c) Filtration d) Absorption
61. What is the name of the fluid that prevents the alveoli 72. What is the primary purpose of breathing through the
from sticking together? nose instead of the mouth?
a) Pleural fluid b) Surfactant a) To produce more energy
c) Hemoglobin d) Mucus b) To filter and warm the air
62. Which part of the respiratory system contains vocal c) To increase oxygen levels in the blood
cords? d) To reduce the breathing rate
a) Pharynx b) Larynx 73. Which of the following can negatively affect the
c) Trachea d) Bronchioles respiratory system?
63. Which organ is responsible for filtering dust and a) Regular exercise b) Breathing fresh air
foreign particles from inhaled air? c) Smoking d) Eating healthy food
a) Lungs b) Nasal cavity 74. What is the role of the pleural membrane in the lungs?
c) Trachea d) Esophagus a) To store oxygen
64. What happens to the rate of respiration when a person b) To reduce friction during breathing
is sleeping? c) To produce energy
a) It increases b) It decreases d) To transport gases
c) It stops temporarily d) It remains constant 75. What happens to the lungs in a person suffering from
65. Which respiratory disease is caused by the pneumonia?
inflammation of the airways? a) The alveoli are filled with fluid
b) The bronchioles are damaged
a) Asthma b) Diabetes
c) The diaphragm becomes rigid
c) Anemia d) Arthritis
d) The lungs expand excessively
66. What happens to glucose during cellular respiration?
a) It is stored as fat