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NCERT CLASS 11 | TOPIC : BREATHING AND EXCHANGE OF GASES | QB-01 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : BREATHING AND EXCHANGE OF GASES | QB-01 | NEET BIOLOGY ONLINE TEST

It contains 100 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : kalvisolai.net

1 ➤ 1. The process of exchange of O2 from the atmosphere with CO2 produced by the cell is called


2 ➤ 2. The harmful gas produced by catabolic reaction in our body is


3 ➤ 3. Oxygen (O2) is utilized by the organisms to __________ break down nutrient molecules like glucose and to derive energy for performing various activities.


4 ➤ 4. Mechanisms of breathing vary among diff erent groups of animals depending mainly on their ________ and _________.


5 ➤ 5. In which of the following, gaseous exchange between O2 and CO2 occurs through the entire body surface?


6 ➤ 6. Select the total number of organism from the following which respire through their body surface.
Sycon, Spongilla, Admsia, Taenia, Laccifer, Pila, Antedon, Gorgonia, Jelly fish


7 ➤ 7. In which of the following skin serves as an accessory organ of respiration?


8 ➤ 8. Match the following : Animals Respiratory Organs
A. Earthworms – 1. Lungs
B. Aquatic arthropods/Molluscs – 2. Tracheal tubes
C. Insects – 3. Gills
D. Birds/ Reptiles/Mammals – 4. Moist cuticle
E. Fishes


9 ➤ 9. Amphibians, e.g., frogs respire through


10 ➤ 10. The adult frog does not respire through


11 ➤ 11. Which is the correct sequence of the air passage in man?


12 ➤ 12. In mammals, voice is produced by


13 ➤ 13. Vocal cords occur in


14 ➤ 14. Trachea divides into right and left primary bronchi at _________ the thoracic vertebra.


15 ➤ 15. Opening of larynx into pharynx is guarded by


16 ➤ 16. Glottis is a passage for


17 ➤ 17. Glottis is an opening in the floor of


18 ➤ 18. The Lungs are protected with the help of?


19 ➤ 19. Which one has the smallest diameter?


20 ➤ 20. Lining of trachea is made of


21 ➤ 21. Each terminal bronchiole gives rise to a number of very thin, irregular walled and vascularized bag like structures called


22 ➤ 22. Epiglottis is made up of


23 ➤ 23. Covering of the lungs is called


24 ➤ 24. Read the following statements:
A. It is double layered and covers the lungs.
B. Outer layer is in contact with thoracic wall.
C. Fluid is present between these layers.
D. Inner layer is in contact with the lungs.
The above features refer to


25 ➤ 25. The part starting with the external nostrils up to the terminal bronchioles constitute the


26 ➤ 26. Respiratory or exchange part of the respiratory system consists of


27 ➤ 27. Sites of gaseous exchange in lungs are


28 ➤ 28. Pleura is a double membrane sac which envelops


29 ➤ 29. Which of the following are functions of conducting part of the respiratory system?


30 ➤ 30. ___________ is the site of actual diffusion of O2 and CO2 between blood and atmospheric air.


31 ➤ 31. Even when air being absent, the human trachea does not collapse due to the presence of


32 ➤ 32. The chambers formed dorsally by the vertebral column, ventrally by sternum, laterally by ribs and on the lower side by dome-shaped diaphragm is


33 ➤ 33. Select the incorrect statement from the following:


34 ➤ 34. During inspiration


35 ➤ 35. During inspiration, the diaphragm


36 ➤ 36. Expiration involves


37 ➤ 37. Which two of the following changes (a to d) usually tend to occur in plain dwellers when they move to higher altitudes (3500 m or more)
(i) Increase in red blood cell size
(ii) Increase in red blood cell production
(iii) Increase in breathing rate
(iv) Increase in thrombocyte count


38 ➤ 38. In alveolar air, the partial pressure of CO2 is


39 ➤ 39. Arrange the following steps of respiration properly:
1. Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.
2. Diffusion of gases (O2 and CO2) across alveolar membrane.
3. Transport of gases by the blood.
4. Diffusion of O2 and CO2 between blood and tissues.
5. Utilization of O2, by the cells for catabolic reactions and resultant release of CO2.


40 ➤ 40. Expiratory muscles contract at the time of


41 ➤ 41. Which of the following statements is correct?


42 ➤ 42. Gaseous exchange between blood and alveolar air across respiratory membrane occurs by


43 ➤ 43. On an average, a healthy human breathes how many times/minute


44 ➤ 44. We can increase the strength of inspiration and expiration by the help of additional muscle in


45 ➤ 45. Match the following:
1. Tidal volume – A. Tidal volume and inspiratory reserve volume and expiratory reserve volume.
2. Inspiratory reserve volume – B. Additional volume of air a person can inspire by a forcible inspiration.
3. Expiratory reserve volume – C. Volume of air remaining in the lungs even after a forcible expiration.
4. Residual volume – D. Tidal volume and inspiratory reserve volume.
5. Inspiratory reserve capacity – E. Volume of air inspirited or expired during a normal respiration.
6. Vital capacity – F. Vital capacity + residual volume
7. Total lung capacity – G. Additional volume of air a person can expire by a forcible expiration.


46 ➤ 46. Match the following:
1. Tidal Volume – A. 2500-3000 ml of air
2. Inspiratory reserve volume – B. 1000-1100 ml of air
3. Expiratory reserve volume – C. 500 ml of air
4. Residual volume – D. 3500-4600 ml of air
5. Vital capacity – E. 1100-1200 ml of air


47 ➤ 47. Total lung capacity is equal to


48 ➤ 48. Vital capacity is equal to


49 ➤ 49. EC (expiratory capacity) is equal to


50 ➤ 50. IC (Inspiratory capacity) is equal to


51 ➤ 51. Arrange the following in the order of increasing vlume
1. Tidal volume
2. Residual volume
3. Expiratory reserve volume
4. Inspiratory reserve volume


52 ➤ 52. The largest quantity of air that can be expired after a maximum inspiratory effort is


53 ➤ 53. The vital capacity of adult human lungs is equal to


54 ➤ 54. Functional residual capacity can be represented as


55 ➤ 55. The volume of air involved in breathing movements can be estimated by using a ________ which helps in clinical assessment of pulmonary functions


56 ➤ 56. A spirometer cannot be used to measure


57 ➤ 57. Inspiratory air in lungs ultimately reaches


58 ➤ 58. Which is not true?


59 ➤ 59. Which of the following factors affect the rate of diffusion of gases?


60 ➤ 60. Lung alveoli of mammals have a thin wall composed of


61 ➤ 61. The mode of respiration in rabbit is


62 ➤ 62. The respiratory diffusion membrane is majorly made of _______ layers


63 ➤ 63. The solubility of CO2 is _______ times higher than that of O2.


64 ➤ 64. What is the value of [PO2 (in deoxygenated blood) minus PcO2 (in deoxygenated blood)]?


65 ➤ 65. Select the incorrect statement from the following:


66 ➤ 66. The total thickness of respiratory diffusion membrane is


67 ➤ 67. Diffusion membrane is made up of


68 ➤ 68. Partial pressures (in mmHg) of O2 in atmospheric air, alveoli, deoxygenated blood, oxygenated blood and tissues are


69 ➤ 69. Partial pressure (in mmHg) of CO2 in atmospheric air, alveoli, deoxygenated blood, oxygenated blood and tissues are


70 ➤ 70. The total percentage of O2 transported by haemoglobin or RBC is


71 ➤ 71. Besides RBC blood plasma also carries O2 in dissolved state. The percentage is


72 ➤ 72. CO2 is transported


73 ➤ 73. Blood entering the lung is rich in


74 ➤ 74. The majority of CO2 is transported as


75 ➤ 75. Oxygen is transported in blood mainly by


76 ➤ 76. Blood transport of CO2 occurs in three forms. The correct percentages of CO2 in these forms are As Carbaminohaemoglobin in RBC As bicarbonates Dissolved form in plasma


77 ➤ 77. Each molecule of haemoglobin can carry at the maximum of _______ molecules of O2.


78 ➤ 78. Under a given oxygen concentration in blood, dissociation of oxyhaemoglobin will increase if


79 ➤ 79. The blood coming out of lungs is richer than that one entering into lungs in


80 ➤ 80. When partial pressure of CO2 (pCO2) rises, the oxygen dissociation curve of haemoglobin at 37°C will


81 ➤ 81. Dissociation curve is connected with


82 ➤ 82. A large proportion of oxygen is left unused in the human blood even after uptake by the body tissue. This oxygen


83 ➤ 83. Oxygen dissociation curve is


84 ➤ 84. Binding of oxygen with haemoglobin can be affected by


85 ➤ 85. The amount of O2 normally carried by 100 ml of pure blood is


86 ➤ 86. How much oxygen is delivered to tissue by 100 ml of oxygenated blood under normal physiological condition?


87 ➤ 87. How much carbon dioxide is delivered to alveoli by 100 ml of deoxygenated blood under normal physiological condition?


88 ➤ 88. Oxygen binding to haemoglobin is


89 ➤ 89. The most characteristic feature of haemoglobin is


90 ➤ 90. Factors at tissue level favours the dissociation of oxygen from oxyhaemoglobin


91 ➤ 91. CO2 dissociates from Carbaminohaemoglobin when


92 ➤ 92. Dissociation of oxyhaemoglobin can be promoted by


93 ➤ 93. The enzyme essential for transport of CO2 as bicarbonate in blood is


94 ➤ 94. What is correct about human respiration?


95 ➤ 95. Choose the right sequential phenomena during the passage of CO2 from blood to tissues: (P) Absorption of CO2 by blood. (Q) Reaction of CO2 with water forming H2CO3 inside RBCs and then HCO3 - and H+ ions. (R) Reaction of CO2 with water forming H2CO3 inside plasma followed by conversion into H+ and HCO3 - ions. (S) Combination of H+ with haeme part of HbO2 to release O2. (T) Combination of HCO3 with haeme part of HbO2 to form reduced haemoglobin and release of O2.


96 ➤ 96. The transport of CO2 by the blood is primarily dependent on the


97 ➤ 97. Pick the correct statement:


98 ➤ 98. Respiratory rhythm centre is present in which part of brain?


99 ➤ 99. Pneumotaxic centre is present in


100 ➤ 100. Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is done by


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