NCERT CLASS 11 | TOPIC : BREATHING AND EXCHANGE OF GASES | QB-02 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : BREATHING AND EXCHANGE OF GASES | QB-02 | NEET BIOLOGY ONLINE TEST

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It contains 76 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : kalvisolai.net

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1 ➤ 101. A _____(1) ____ sensitive area is situated adjacent to the rhythm centre which is highly sensitive to _____ (2) _____and _____ (3) _____ ions.

(a) (1)–thermo, (2)–CO2, (3)–hydroxide (b) (1)–chemo, (2)–O2, (3)–hydroxide (c) (1)–thigmo, (2)–O2, (3)–hydrogen (d) (1)–chemo, (2)–CO2, (3)–hydrogen

2 ➤ 102. All of the following factors play an important role in the regulation of respiratory rhythm except

(a) CO2 (b) H+ conc (c) O2 (d) None of these

3 ➤ 103. Select the incorrect statement from the following:

(a) Neural signal from pneumotaxic centre can reduce the duration of inspiration. (b) The role of oxygen in the regulation of respiratory rhythm is quite significant. (c) RBCs contain a very high concentration of the enzyme, carbonic anhydrase and minute quantities of the same is present in the plasma too. (d) CO2 is carried by haemoglobin as carbamino-haemoglobin (about 20–25 per cent).

4 ➤ 104. Receptors associated with aortic and carotid artery can recognize changes in ______ and _____ concentration and send necessary signal to _____ for remedial action.

(a) O2, CO2, pneumotaxic (b) CO2, H+, rhythm centre (c) CO2, H+, apneustic centre (d) O2, H+, pneumotaxic

5 ➤ 105. Carbonic anhydrase is found in high concentration in

(a) Leucocytes (b) Blood plasma (c) Erythrocytes (d) Lymphocytes

6 ➤ 106. The controlling centre of normal breathing in mammals lies in

(a) Cerebrum (b) Cerebellum (c) Midbrain (d) Medulla oblongata

7 ➤ 107. Number of RBCs per unit volume of blood is likely to be higher in a person living at high altitudes, because

(a) Air is clean and unpolluted (b) More sunshine is available (c) Air is less dense (d) Vegetation gives out more O2 Disorder of Respiratory System

8 ➤ 108. Wheezing sound is produced in

(a) Asthma (b) Emphysema (c) Silicosis (d) Pneumonia

9 ➤ 109. Major cause of emphysema is

(a) Cigarette smoking (b) Allergy (c) Wine consumption (d) Viral infection

10 ➤ 110. Match the column: Column A Column B

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1. Asthma – A. Inflammation of bronchi and bronchioles.

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2. Emphysema – B. Chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased.

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3. Occupational Respiratory Disorders – C. Long exposure of chemicals can give rise to inflammation leading to fibrosis (proliferation of fibrous tissues).

(a) 1-A, 2-B, 3-C (b) 1-B, 2-A, 3-C (c) 1-C, 2-A, 3-B (d) 1-C, 2-B, 3-A

11 ➤ 111. Emphysema is a

(a) Cardiovascular disease (b) Pulmonary disease (c) Renal disease (d) Pain in lungs

12 ➤ 112. Which of the following is incorrect about occupational respiratory disorder?

(a) It occur in some industries, especially those involving grinding or stone-breaking. (b) Long exposure in such industries leading to fibrosis (proliferation of fibrous tissues). (c) Workers in such industries can be protected from these disorders by wearing protective masks. (d) It is an allergic disease always.

13 ➤ 113. Respiratory control centre lies in

(a) Pons (b) Medulla oblongata (c) Both (a) and (b) (d) Cerebellum

14 ➤ 114. Two friends are eating together in a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to the improper movement of

(a) Tongue (b) Epiglottis (c) Diaphragm (d) Neck

15 ➤ 115. Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

(a) One can breathe out air totally without oxygen. (b) One can breathe out air through Eustachian tubes by closing both the nose and the mouth. (c) One can consciously breathe out by moving the diaphragm alone without moving the ribs at all. (d) The lungs can be made fully empty by forcefully breathing out all air from them.

16 ➤ 116. Cartilaginous rings in respiratory passage are present in

(a) Trachea only (b) Trachea and initial bronchioles only (c) Trachea, bronchi and initial bronchioles (d) None of these

17 ➤ 117. Which of the following represents a larger volume of air than that is normally found in the resting tidal volume or a human lung?

(a) Residual volume (b) Inspiratory reserve volume (c) Expiratory reserve volume (d) All the above

18 ➤ 118. Mark the correct statement from the following:

(a) Tracheal rings are of hyaline cartilage. (b) Dorsal side of thoracic chamber is formed by sternum. (c) Expiration occurs when there is negative pressure in lungs. (d) All the above

19 ➤ 119. 6000-8000 ml of air is the

(a) Vital capacity of lungs b) Volume of normal expiration per minute (c) Sum of IRV + ERV (d) Inspiratory capacity of lungs

20 ➤ 120. The volume of air that remains in the lungs after normal expiration is

(a) Residual volume (b) Vital capacity (c) Expiratory capacity (d) Functional residual capacity

21 ➤ 121. A large prportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This O2

(a) Helps in releasing more O2 to the epithelium tissues. (b) Acts as a reserve during muscular exercise. (c) Raises the pCO2 of blood to 75 mm of Hg. (d) Is enough to keep oxyhaemoglobin saturation at 96%.

22 ➤ 122. Bulk of carbon dioxide (CO2) released from body tissues into blood is present as

(a) Bicarbonate in blood plasma and RBCs (b) Free CO2 in blood plasma. (c) 70 per cent carbaminohaemoglobin and 30 per cent as bicarbonate. (d) Carbaminohaemoglobin in RBCs.

23 ➤ 123. Name the blood vessel A to D.

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(a) A–Pulmonary vein, B–Systemic vein, C–Pulmonary artery, D–Systemic artery (b) A–Systemic vein, B–Systemic artery, C–Pulmonary vein, D–Pulmonary artery (c) A–Systemic artery, B–Pulmonary artery, C–Systemic vein, D–Systemic artery (d) A–Pulmonary artery, B–Systemic vein, C–Systemic artery, D–Pulmonary vein

24 ➤ 124. Study the accompanying figure.

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Identify A to C from the above figure.

(a) A–Basement substance, B–RBC, C–Alveolar wall (b) A–Alveolar wall, B–Basement substance, C–RBC (c) A–RBC, B–Basement substance, C–Alveolar wall (d) A–RBC, B–Alveolar wall, C–Basement substance

25 ➤ 125. How O2 and CO2 gets transported through blood?

(a) With the help of RBCs and blood plasma (b) With the help of RBCs and WBCs (c) With the help of WBCs and blood serum ( d) With the help of platelets and corpuscles

26 ➤ 126. During oxygen transport the oxyhaemoglobin at the tissue level liberates oxygen to the cells because in tissue

(a) O2 concentration is high and CO2 is low. (b) O2 concentration is low and CO2 is also low. (c) O2 tension is high and CO2 tension is low. (d) O2 tension is low and CO2 tension is high.

27 ➤ 127. The blood leaving the lungs has all its haemoglobin oxygenated and gives up oxygen to the tissues because

(a) The tissue can absorb O2 from oxyhaemoglobin. (b) O2 concentration in tissues is lower and CO2 concentration is higher as compared to lungs. (c) O2 concentration inculatory system, is issues is higher and CO2 concentration is lower as compared to lungs. (d) Oxyhaemoglobin undergoes reduction.

28 ➤ 128. During one circuit of blood from lungs to the tissues and back through circulatory system the percentage of haemoglobin giving up its oxygen to tissues is

(a) 25% (b) 50% (c) 75% (d) 100%

29 ➤ 129. Assertion: Fishes use tracheal tubes for respiration.

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Reason: Fishes are amphibian.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

30 ➤ 130. Assertion: Humans can directly alter the pulmonary volume without change in the volume of thoracic cavity.

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Reason: Our lungs are inelastic.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

31 ➤ 131. Assertion: We have the ability to increase the strength of inspiration and expiration.

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Reason: We have some vestigeal abdominal muscles.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

32 ➤ 132. Assertion: During inspiration, pressure of air falls in the thorax.

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Reason: There is a rise in volume of thorax during inspiration.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

33 ➤ 133. Assertion: During inspiration, the volume of thorax increases.

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Reason: This happens due to the relaxation of diaphragm and inspiratory muscles.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

34 ➤ 134. Assertion: Forceful expiration occurs through expiratory muscles.

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Reason: Expiratory muscles expires quickly.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

35 ➤ 135. Assertion: Vital capacity is higher in athletes than non-athletes.

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Reason: Vital capacity is about 3.5–4.5 litres in a normal adult person.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

36 ➤ 136. Assertion: 70 per cent of CO2 is carried as bicarbonate ion in plasma.

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Reason: If it is transported directly then pH of blood becomes acidic.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

37 ➤ 137. Assertion: In mammals, complex respiratory system has developed.

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Reason: Mammalian skin is impermeable to gases.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

38 ➤ 138. Assertion: Emphysema is a chronic disorder.

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Reason: One of the major cause of emphysema is cigarette smoking. Assertion and Reason Questions

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

39 ➤ 139. Assertion: Respiratory rhythm is maintained by the respiratory centre in medulla region of brain.

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Reason: A chemosensitive area in the medulla can alter the respiratory mechanism.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

40 ➤ 140. Assertion: The maximum amount of CO2 is converted into bicarbonate ion in RBCs.

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Reason: RBCs contain a very high concentration of the enzyme, carbonic anhydrase.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

41 ➤ 141. Assertion: Blood of insects is colourless.

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Reason: The blood of insect does not play any role in transport of oxygen.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

42 ➤ 142. Assertion: In mollusca, the circulatory system is of closed type.

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Reason: The blood of mollusca contains haemoglobin.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

43 ➤ 143. Assertion: The amount of CO2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher when compared to that of O2.

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Reason: The solubility of CO2 is 20 to 25 times higher than that of O2.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

44 ➤ 144. Assertion: Trachea, primary, secondary and tertiary bronchi and terminal bronchioles are non-collapsible.

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Reason: They all are supported by incomplete cartilaginous ring

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

45 ➤ 145. Assertion: Human breathing is negative pressure breathing.

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Reason: Air drawn in lungs because of pressure less than atmospheric pressure in lungs during inspiration

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

46 ➤ 146. Assertion: Functional residual capacity is equal to ERV+RV

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Reason: Expiratory capacity is equal to TV+IRV

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

47 ➤ 147. Assertion: Oxygen dissociation curve is sigmoid.

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Reason: Affinity of oxygen for Hb increases with addition of each molecule of oxygen one after another.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

48 ➤ 148. Assertion: Pneumotaxic centre can alter the respiratory rate.

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Reason: Neural signal from pneumotaxic centre can reduce the duration of inspiration.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

49 ➤ 149. Assertion: Every 100 ml of oxygenated blood can deliver around 5 ml of O2 to the tissues.

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Reason: Every 100 ml of deoxygenated blood delivers approx 4 ml of CO2 to the alveoli.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

50 ➤ 150. Assertion: Oxygen is transported mainly as oxyhaemoglobin in human.

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Reason: CO2 is transported mainly as carbamino - haemoglobin in human.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

51 ➤ 151. Assertion: CO2 produced by cells have to be released out of animal body. Reason: CO2 is harmful gas.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

52 ➤ 152. Assertion: Gills are highly vascularised

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Reason: Gills are used for respiration

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

53 ➤ 153. Assertion: Fishes respire through lungs

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Reason: Amphibians respire through gills

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

54 ➤ 154. Assertion: During swallowing food can’t enter in larynx.

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Reason: During swallowing open of larynx glottis is covered by epiglottis

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

55 ➤ 155. Assertion: Larynx is called sound box.

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Reason: Larynx helps in production of sound

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

56 ➤ 156. Assertion: Alveoli and their duct form respiratory part of respiratory tract.

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Reason: This part is actual site of exchange of O2 and CO2 between blood and atmospheric air.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

57 ➤ 157. Assertion: External nostril to terminal bronchioles constitutes conducting as well as respiratory part of respiratory tract.

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Reason: It help in conduction of atmospheric air to the alveoli as well as diffusion of O2 and CO2 between blood and atmospheric air.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

58 ➤ 158. Assertion: Inspiration during which alveolar air is released out.

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Reason: Expiration by which atmospheric air is drawn in.

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

59 ➤ 159. Assertion: We can increase strength of inspiration and expiration.

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Reason: We can use additional muscle of thoracic and abdominal region

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

60 ➤ 160. Assertion: About 97% of O2 is transported by RBCs

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Reason: RBCs has haemoglobin. previous year questions

(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false.

61 ➤ 1. Respiration in insects is called direct because

(a) The tissues exchanges O2/CO2 directly with the air in the tubes. (b) The tissues exchange O2/CO2 directly with coelomic fluid. (c) The tissues exchange O2/CO2 directly with the air outside through body surface. (d) Tracheal tubes exchange O2/CO2 directly with the haemocoel which then exchanges with tissues.

62 ➤ 2. Regarding the functions of our respiratory system, mark the wrong entry.

(a) Humidifies the air (b) Warms up the air (c) Diffusion of gases (d) Cleans up the air

63 ➤ 3. A person suffers punctures in his chest cavity in an accident, without any damage to the lungs. Its effect could be

(a) Reduced breathing rate (b) Rapid increase in breathing rate (c) No change in respiration (d) Cessation of breathing

64 ➤ 4. It is known that exposure to carbon monoxide is harmful to animals because

(a) It reduces CO2 transport (b) It reduces O2 transport (c) It increases CO2 transport (d) It destroys haemoglobin

65 ➤ 5. Mark the true statement among the following with reference to normal breathing

(a) Inspiration is a passive process whereas expiration is active (b) Inspiration is an active process where as expiration is passive (c) Inspiration and expiration are active processes (d) Inspiration and expiration are passive processes.

66 ➤ 6. A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is

(a) Total lung capacity (b) Tidal volume (c) Vital capacity (d) Inspiratory capacity

67 ➤ 7. Mark the incorrect statement in context to O2 binding to Hb

(a) Higher pH (b) Higher temperature (c) Lower pCO2 (d) Higher pO2.

68 ➤ 8. Mark the correct pair of muscles involved in the normal breathing in humans

(a) External and internal intercostal muscles (b) Diaphragm and abdominal muscles (c) Diaphragm and external intercostal muscles (d) Diaphragm and internal intercostal muscles.

69 ➤ 9. Incidence of Emphysema, a respiratory disorder is high in cigarette smokers. In such cases

(a) The bronchioles are found damaged. (b) The alveolar walls are found damaged. (c) The plasma membrane is found damaged. (d) The respiratory muscles are found damaged.

70 ➤ 10. Respiratory process is regulated by certain specialized centres in the brain. Which of the following listed centres can reduce the inspiratory duration upon stimulation?

(a) Medullary inspiratory centre (b) Pneumotaxic centre (c) Apneustic centre (d) Chemosensitive centre

71 ➤ 11. CO2 dissociates from carbaminohemoglobin when

(a) pCO2 is high and pO2 is low (b) pO2 is high and pCO2 is low (c) pCO2 and pO2 are equal (d) None of these

72 ➤ 12. In breathing movements, air volume can be estimated by

(a) Stethoscope (b) Hygrometer (c) Sphygmomanometer (d) Spirometer.

73 ➤ 13. From the following relationships, between respiratory volumes and capacities, mark the correct option.

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(i) Inspiratory capacity (IC) = Tidal Volume + Residual Volume

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(ii) Vital Capacity (VC) = Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV)

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(iii) Residual Volume (RV) = Vital Capacity (VC) – Inspiratory Reserve Volume (IRV)

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(iv) Tidal Volume (TV) = Inspiratory Capacity (IC) – Inspiratory Reserve Volume (IRV)

(a) (i) Incorrect, (ii) Incorrect, (iii) Incorrect (iv) Correct (b) (i) Incorrect, (ii) Correct, (iii) Incorrect, (iv) Correct (c) (i) Correct, (ii) Correct, (iii) Incorrect, (iv) Correct (d) (i) Correct, (ii) Incorrect, (iii) Correct, (iv) Incorrect

74 ➤ 14. The oxygen–haemoglobin dissociation curve will, show a right shift in case of

(a) High pCO2 (b) High pO2 (c) Low pCO2 (d) Less H+ concentration

75 ➤ 15. Match the following and mark the correct options. Animal / Respiratory Organ

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(A) Earthworm - (i) Moist cuticle

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(B) Aquatic Arthropods - (ii) Gills

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(C) Fishes - (iii) Lungs

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(D) Birds/Reptiles - (iv) Trachea

(a) (A)–(ii), (B)–(i), (C)–(iv), (D)–(iii) (b) (A)–(ii), (B)–(iv), (C)–(i), (D)–(iii) (c) (A)–(i), (B)–(iii), (C)–(ii), (D)–(iv) (d) (A)–(i), (B)–(ii), (C)–(iv), (D)–(iii)

76 ➤ 3. Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of [AIPMT PRE 2011]

(a) Diaphragm (b) Neck (c) Tongue (d) Epiglottis

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