This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Air is breathed through- A) Trachea-lungs-larynx-pharynx-alveoli. B) Nose-larynx-pharynx-bronchus-alveoli-bronchioles. C) Nostrils-pharynx-larynx-trachea-bronchi-bronchioles-alveoli. D) Nose-mouth-lungs. Show Answer Correct Answer: C) Nostrils-pharynx-larynx-trachea-bronchi-bronchioles-alveoli. 2. The ion found in the haem group is what A) Mg$^{2+}$. B) O$^{2-}$. C) Fe$^{2+}$. D) Fe$^{3+}$. Show Answer Correct Answer: C) Fe$^{2+}$. 3. Treachea divides into two right and left primary bronchi at the level of ..... ? A) 7th cervial vartebrae. B) 3rd thoracic vertebrae. C) 5th thoracic vertebrae. D) 7th thoracic vertebrae. Show Answer Correct Answer: C) 5th thoracic vertebrae. 4. Total volume of air accommodated in the lungs at the end of a forced inspiration is called A) VC. B) IRV. C) RV. D) TLC. Show Answer Correct Answer: D) TLC. 5. Part of pharynx which open in the nasal cavity: A) Internal nares. B) Nasopharynx. C) Oropharynx. D) None. Show Answer Correct Answer: B) Nasopharynx. 6. 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. Show Answer Correct Answer: D) Cessation of breathing. 7. Structures in cockroach that are similar to nostrils of human? A) Trachea. B) Spiracles. C) Tracheole. D) Lungs. Show Answer Correct Answer: B) Spiracles. 8. What is the role of the nasal cavity in the respiratory system? A) To regulate blood flow. B) To facilitate gas exchange. C) To filter and humidify air. D) To produce mucus. Show Answer Correct Answer: C) To filter and humidify air. 9. The trachea is lined with ..... ? A) Ciliated simple sqamous epithelium. B) Stratified squamous epithelium. C) Pseudostratified ciliated columnar epithelium. D) Pseudostratified squamous epithelium. Show Answer Correct Answer: C) Pseudostratified ciliated columnar epithelium. 10. Air enters the lungs. A) Inhalation. B) Exhalation. C) All the above. D) None of the above. Show Answer Correct Answer: A) Inhalation. 11. Which of the following is true of a normal adult hemoglobin oxygen dissociation curve?I. it is sigmoidalII. it is easier for the last O$_{2}$ to bind than the second and third III. at lower partial pressures of oxygen, hemoglobin has a lower affinity for oxygen A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and III only. 12. Bulk of carbon dioxide is transported by ..... A) Nitrogen. B) Oxygen. C) Bicarbonate ion (HCO3-). D) Water vapor. Show Answer Correct Answer: C) Bicarbonate ion (HCO3-). 13. What is true about RBCs in humans? A) They transport about 80% oxygen only and the rest 20% of it is transported in the dissolved state in blood plasma. B) They transport 99.5% of O$_{2}$. C) They carry about 20-25% of CO$_{2}$. D) They do not carry CO$_{2 }$at all. Show Answer Correct Answer: C) They carry about 20-25% of CO$_{2}$. 14. Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place? A) Diaphragm relaxes and moves upward, intercostal muscles relax and move inward. B) Diaphragm contracts and moves upward, intercostal muscles relax and move inward. C) Diaphragm relaxes and moves downward, intercostal muscles relax and move outward. D) Diaphragm contracts and moves downward, intercostal muscles contract and move outward. Show Answer Correct Answer: A) Diaphragm relaxes and moves upward, intercostal muscles relax and move inward. 15. Alveoli have very thick walls to maximise the distance that gases have to move. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. In which of the following gaseous exchange between O$_{2}$ and CO$_{2}$ occurs through general body surface? A) Sponges. B) Coelenterates. C) Flatworms. D) All. Show Answer Correct Answer: D) All. 17. What are the main muscles of inhalation? A) The diaphragm and intercostal muscles. B) The external and internal intercostals. C) The diaphram and abdominal muscles. D) The diaphragm and internal intercostals. Show Answer Correct Answer: A) The diaphragm and intercostal muscles. 18. What is the favorable condition for the formation of oxyhaemoglobin in the alveoli? A) High oxygen concentration. B) Low carbon dioxide concentration. C) Thin walls for easy diffusion. D) Presence of haemoglobin in red blood cells. Show Answer Correct Answer: B) Low carbon dioxide concentration. 19. I. On an average a healthy human breathes12-16 times/minute. II. The volume of air involved in the breathing movements can be estimated by spirometer. III. Diaphragm is very useful in both inspiration and expiration Which of the above statements are incorrect? Choose the correct option. A) I and II. B) II and III. C) I and III. D) None of these. Show Answer Correct Answer: D) None of these. 20. Whichofthefollowingisan occupational respiratory disorder? (a) (b) (c) Ans. (b) (d) A) Botulism. B) Silicosis. C) Anthracis. D) Emphysema. Show Answer Correct Answer: B) Silicosis. 21. Select the correct option A) Nasal cavity, larynx, pharynx, trachea, bronchus. B) Nasal cavity, pharynx, larynx, bronchus, trachea. C) Nasal cavity, pharynx, larynx, trachea, bronchus,. D) Nasal cavity, larynx, pharynx, bronchus, trachea,. Show Answer Correct Answer: C) Nasal cavity, pharynx, larynx, trachea, bronchus,. 22. Respiration involves following steps:A. Diffusion of gases O2 and CO2 across alveolar membrane. B. Transport of gases by blood. C. Utilization of O2 by cell for catabolic reaction and resultant release of O2. D. Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich air is released out. E. Diffusion of O2 and CO2 between blood and tissue. A) DBAEC. B) DABCE. C) BADCE. D) DABEC. Show Answer Correct Answer: D) DABEC. 23. 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. Show Answer Correct Answer: B) The alveolar walls are found damaged. 24. After air moves through the pharynx it continues downward. The ..... , or windpipe, directs the air into 2 separate branches or tubes. A) Bronchus. B) Trachea. C) Larynx. D) Bronchiole. Show Answer Correct Answer: B) Trachea. 25. Trachea divides at A) 5th thoracic vertebra into right and left secondarybronchi. B) 7th thoracic vertebra into secondary bronchi. C) 5th thoracic vertebra into right and left primarybronchi. D) 7th thoracic vertebra into primary bronchi. Show Answer Correct Answer: C) 5th thoracic vertebra into right and left primarybronchi. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 1Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 3Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 4Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 5Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 6Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 7Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 8Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 9Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 10Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books