Class: XI (NEET) Respiratory System Class Test
Date: 17/10/25 Max. Marks: 440
1. Given below are two statements:
Statement I: Mechanisms of breathing vary among different groups of animals depending mainly on
their habitats and level of organisation.
Statement II: The process of exchange of O2 from the atmosphere with CO2 produced by the cells is
called breathing.
In the light of the above statements, choose the most appropriate answer from the options given
below:
(1) Both statement I and II are incorrect.
(2) Statement I is correct, but statement II is incorrect.
(3) Statement I is incorrect, and statement II is correct.
(4) Both statement I and II are correct.
2. What is the reason behind calling respiration direct in insects?
(1) The tissues exchange O2 / CO 2 directly with the air outside through body surface
(2) Tracheal tubes exchange O2 / CO2 directly with the haemocoel which then exchange with tissues
(3) The cell exchange O2 / CO2 directly with the air in the tubes
(4) The tissues exchange O2 / CO2 directly with coelomic fluid
3. Which of the following is the correct pathway of air in the respiratory system?
(1) External nostril nasal chamber → larynx → pharynx nasal passage trachea primary bronchi initial
→ secondary bronchi→ tertiary bronchi bronchioles terminal bronchioles → duct of alveoli → alveoli
(2) External nostril → nasal passage → nasal chamber pharynx → larynx → trachea→ initial
bronchioles terminal bronchioles primary bronchi → secondary bronchi→ tertiary bronchi→ duct of
alveoli alveoli
(3) External nostril nasal chamber → nasal passage larynx → pharynx → trachea→ initial bronchioles
terminal bronchioles primary bronchi→ secondary bronchi→ tertiary bronchi→ duct of alveoli alveoli
(4) External nostril nasal passage nasal chamber pharynx larynx → trachea→ primary bronchi →
secondary bronchi tertiary bronchi initial bronchioles alveoli terminal bronchioles duct of alveoli
4. The lower invertebrates like sponges perform (1. Among vertebrates, fish use (ii), whereas reptiles,
birds and mammals use (iii).
Fill in the blanks with the correct option:
(i) (ii) (iii)
(1) Osmosis Book lungs Lungs
(2) Simple diffusion Gills Lungs
(3) Simple diffusion Lungs Gills
(4) Osmosis Lungs Gills
5. Which of the following is correct w.r.t. trachea?
(1) Trachea is a straight tube.
(2) Trachea divides into a pair of primary bronchi at the level of 5th thoracic vertebra.
(3) Cartilaginous rings in trachea are incomplete.
(4) All of the above
6. Which of the following part of the respiratory tract does not have cartilaginous rings in its wall?
(1) Trachea
(2) Primary bronchi
(3) Secondary bronchi
(4) Alveoli
7. Match the following columns and choose the correct option.
Column I Column II
1. Coelenterates a. Lungs
2. Branchial respiration b. Entire body surface
,3. Insects C. Gills
4. Pulmonary respiration d. Tracheal tubes
(1) 1 - c, 2 - d, 3 - b, 4 - a
(2) 1 - b, 2 - c, 3 - d, 4 - a
(3) 1 - b, 2 - d, 3 - a, 4 - c
(4) 1 - b ,2 – c, 3 – a, 4 – d
8. Read the following statements and choose the correct option.
i. Lungs are used for the exchange of gases in terrestrial arthropods.
ii. Amphibians like frogs can respire through their moist skin.
iii. Epiglottis prevents the entry of food into the larynx.
iv. Air passes from nasal chambers to pharynx through nasal passage.
How many statements are correct?
(1) One
(2) Three
(3) Two
(4) Four
9. All of the following form conducting part of the respiratory tract, except
(1) Trachea
(2) Secondary bronchi
(3) Alveoli
(4) Terminal bronchiole
10. Read the following statements. Which of the following are correct?
(i) Lungs are covered with double-layered membrane called pleura.
(ii) Cardiac notch is present in right lung
. (iⅲ) The alveolar ducts and alveoli constitute the exchange part of the respiratory tract.
(iv) Left lung has three lobes, while the right lung has two.
(1) (i) and (ii)
(2) (i) and (iii)
(3) (ii) and (iv)
(4) (iii) and (iv)
11. is a flap of cartilage behind the root of tongue, which is depressed during swallowing to cover the
opening of larynx.
(1) Glottis
(3) Cricoid
(2) Epiglottis
(4) Trachea
12. Which of the following is the correct sequence of respiration in our body?
(i) Exchange of gases between deoxygenated blood and alveoli.
(ii) Utilization of oxygen by the cells.
(iii) Exchange of gases between oxygenated blood and tissue.
(iv) Inhalation of air.
(1) (i), (iii), (ii), (iv)
(3) (iv), (iii), (ii), (i)
(2) (iv), (i), (iii), (ii)
(4) (iv), (ii), (iii), (i)
13. The thoracic chamber is formed dorsally by the (i) ventrally by the (ii), laterally by the (iii), and on
lower side by the (iv).
Fill in the blanks with the correct option.
1 (i) (ii) (iii) (iv)
(1) Ribs Sternum Diaphragm Vertebral column
(2) Vertebral column Sternum Ribs Diaphragm
, (3) Sternum Ribs Vertebral column Diaphragm
(4) Sternum Vertebral columnRibs Diaphragm
14. Which of the following is incorrect w.r.t. human respiratory system?
(1) Larynx is the sound box in humans.
(2) The nasal chambers open into larynx, the common passage for food and air.
(3) We have a pair of external nostrils opening out above the upper lips.
(4) Inner surface of bronchi and bronchioles is lined by ciliated epithelium.
15. Match the columns:
Column I(Animal) Column II (Respiratory organ)
A. Fishes i. Lungs
B. Aquatic arthropods ii. Gills
C. Birds/Reptiles iii. Trachea
D. Earthworm iv. Moist cuticle
(1) Aii, Biv, C-iii, D - i
(2) Ai, Bii, Civ, D-iii
(3) Aiii, Biv, C-i, d-ii
(4) A - ii B - ii C - i D - iv
16. Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason (R).
Assertion (A): Exchange part of the lungs is the site of actual diffusion of O_{2} and C*O_{2} between
blood and atmospheric air.
Reason (R): Pulmonary ventilation is the process by which atmospheric air is drawn in and C*O_{2}
rich alveolar air is released out.
In the light of the above statements, choose the correct answer from the options given below:
(1) Both assertion and reason are true, and reason is the correct explanation of the assertion
(2) Both assertion and reason are true, but reason is not the correct explanation of the assertion
(3) Assertion is true, but reason is false
(4) Both assertion and reason are false
17. Which of the following statements is incorrect regarding respiratory system?
(1) Each terminal bronchiole give rise to a network of bronchi.
(2) The alveoli are highly vascularised.
(3) The lungs are covered by a double-layered membrane.
(4) The pleural fluid reduces friction on the lung surface.
18. Which of the following is the function of pleural fluid?
(1) Helps in exchange of gases
(2) Expands the volume of thoracic cavity
(3) Reduces friction on the lung-surface
(4) Provide protection to the alveoli
19. Read the following functions of conducting part of the lungs.
i. Transports of atmospheric air to the alveoli.
ii. Humidifies and brings the air to body temperature.
iii. Clears atmospheric air from foreign particles.
iv. Exchange of gases between alveoli and blood.
Choose the correct option.
(1) i and ii
(2) ii and iii
(3) iii and iv
(4) i, ii and iii
20. Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason (R).
Date: 17/10/25 Max. Marks: 440
1. Given below are two statements:
Statement I: Mechanisms of breathing vary among different groups of animals depending mainly on
their habitats and level of organisation.
Statement II: The process of exchange of O2 from the atmosphere with CO2 produced by the cells is
called breathing.
In the light of the above statements, choose the most appropriate answer from the options given
below:
(1) Both statement I and II are incorrect.
(2) Statement I is correct, but statement II is incorrect.
(3) Statement I is incorrect, and statement II is correct.
(4) Both statement I and II are correct.
2. What is the reason behind calling respiration direct in insects?
(1) The tissues exchange O2 / CO 2 directly with the air outside through body surface
(2) Tracheal tubes exchange O2 / CO2 directly with the haemocoel which then exchange with tissues
(3) The cell exchange O2 / CO2 directly with the air in the tubes
(4) The tissues exchange O2 / CO2 directly with coelomic fluid
3. Which of the following is the correct pathway of air in the respiratory system?
(1) External nostril nasal chamber → larynx → pharynx nasal passage trachea primary bronchi initial
→ secondary bronchi→ tertiary bronchi bronchioles terminal bronchioles → duct of alveoli → alveoli
(2) External nostril → nasal passage → nasal chamber pharynx → larynx → trachea→ initial
bronchioles terminal bronchioles primary bronchi → secondary bronchi→ tertiary bronchi→ duct of
alveoli alveoli
(3) External nostril nasal chamber → nasal passage larynx → pharynx → trachea→ initial bronchioles
terminal bronchioles primary bronchi→ secondary bronchi→ tertiary bronchi→ duct of alveoli alveoli
(4) External nostril nasal passage nasal chamber pharynx larynx → trachea→ primary bronchi →
secondary bronchi tertiary bronchi initial bronchioles alveoli terminal bronchioles duct of alveoli
4. The lower invertebrates like sponges perform (1. Among vertebrates, fish use (ii), whereas reptiles,
birds and mammals use (iii).
Fill in the blanks with the correct option:
(i) (ii) (iii)
(1) Osmosis Book lungs Lungs
(2) Simple diffusion Gills Lungs
(3) Simple diffusion Lungs Gills
(4) Osmosis Lungs Gills
5. Which of the following is correct w.r.t. trachea?
(1) Trachea is a straight tube.
(2) Trachea divides into a pair of primary bronchi at the level of 5th thoracic vertebra.
(3) Cartilaginous rings in trachea are incomplete.
(4) All of the above
6. Which of the following part of the respiratory tract does not have cartilaginous rings in its wall?
(1) Trachea
(2) Primary bronchi
(3) Secondary bronchi
(4) Alveoli
7. Match the following columns and choose the correct option.
Column I Column II
1. Coelenterates a. Lungs
2. Branchial respiration b. Entire body surface
,3. Insects C. Gills
4. Pulmonary respiration d. Tracheal tubes
(1) 1 - c, 2 - d, 3 - b, 4 - a
(2) 1 - b, 2 - c, 3 - d, 4 - a
(3) 1 - b, 2 - d, 3 - a, 4 - c
(4) 1 - b ,2 – c, 3 – a, 4 – d
8. Read the following statements and choose the correct option.
i. Lungs are used for the exchange of gases in terrestrial arthropods.
ii. Amphibians like frogs can respire through their moist skin.
iii. Epiglottis prevents the entry of food into the larynx.
iv. Air passes from nasal chambers to pharynx through nasal passage.
How many statements are correct?
(1) One
(2) Three
(3) Two
(4) Four
9. All of the following form conducting part of the respiratory tract, except
(1) Trachea
(2) Secondary bronchi
(3) Alveoli
(4) Terminal bronchiole
10. Read the following statements. Which of the following are correct?
(i) Lungs are covered with double-layered membrane called pleura.
(ii) Cardiac notch is present in right lung
. (iⅲ) The alveolar ducts and alveoli constitute the exchange part of the respiratory tract.
(iv) Left lung has three lobes, while the right lung has two.
(1) (i) and (ii)
(2) (i) and (iii)
(3) (ii) and (iv)
(4) (iii) and (iv)
11. is a flap of cartilage behind the root of tongue, which is depressed during swallowing to cover the
opening of larynx.
(1) Glottis
(3) Cricoid
(2) Epiglottis
(4) Trachea
12. Which of the following is the correct sequence of respiration in our body?
(i) Exchange of gases between deoxygenated blood and alveoli.
(ii) Utilization of oxygen by the cells.
(iii) Exchange of gases between oxygenated blood and tissue.
(iv) Inhalation of air.
(1) (i), (iii), (ii), (iv)
(3) (iv), (iii), (ii), (i)
(2) (iv), (i), (iii), (ii)
(4) (iv), (ii), (iii), (i)
13. The thoracic chamber is formed dorsally by the (i) ventrally by the (ii), laterally by the (iii), and on
lower side by the (iv).
Fill in the blanks with the correct option.
1 (i) (ii) (iii) (iv)
(1) Ribs Sternum Diaphragm Vertebral column
(2) Vertebral column Sternum Ribs Diaphragm
, (3) Sternum Ribs Vertebral column Diaphragm
(4) Sternum Vertebral columnRibs Diaphragm
14. Which of the following is incorrect w.r.t. human respiratory system?
(1) Larynx is the sound box in humans.
(2) The nasal chambers open into larynx, the common passage for food and air.
(3) We have a pair of external nostrils opening out above the upper lips.
(4) Inner surface of bronchi and bronchioles is lined by ciliated epithelium.
15. Match the columns:
Column I(Animal) Column II (Respiratory organ)
A. Fishes i. Lungs
B. Aquatic arthropods ii. Gills
C. Birds/Reptiles iii. Trachea
D. Earthworm iv. Moist cuticle
(1) Aii, Biv, C-iii, D - i
(2) Ai, Bii, Civ, D-iii
(3) Aiii, Biv, C-i, d-ii
(4) A - ii B - ii C - i D - iv
16. Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason (R).
Assertion (A): Exchange part of the lungs is the site of actual diffusion of O_{2} and C*O_{2} between
blood and atmospheric air.
Reason (R): Pulmonary ventilation is the process by which atmospheric air is drawn in and C*O_{2}
rich alveolar air is released out.
In the light of the above statements, choose the correct answer from the options given below:
(1) Both assertion and reason are true, and reason is the correct explanation of the assertion
(2) Both assertion and reason are true, but reason is not the correct explanation of the assertion
(3) Assertion is true, but reason is false
(4) Both assertion and reason are false
17. Which of the following statements is incorrect regarding respiratory system?
(1) Each terminal bronchiole give rise to a network of bronchi.
(2) The alveoli are highly vascularised.
(3) The lungs are covered by a double-layered membrane.
(4) The pleural fluid reduces friction on the lung surface.
18. Which of the following is the function of pleural fluid?
(1) Helps in exchange of gases
(2) Expands the volume of thoracic cavity
(3) Reduces friction on the lung-surface
(4) Provide protection to the alveoli
19. Read the following functions of conducting part of the lungs.
i. Transports of atmospheric air to the alveoli.
ii. Humidifies and brings the air to body temperature.
iii. Clears atmospheric air from foreign particles.
iv. Exchange of gases between alveoli and blood.
Choose the correct option.
(1) i and ii
(2) ii and iii
(3) iii and iv
(4) i, ii and iii
20. Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason (R).
