This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. During exhalation, the ribs become depressed as the intercostal muscles relax-Thus the lung volume decreases which increases the alveolar pressure. What does this cause? A) Air flows from the area of lower pressure in the alveoli to the area of higher pressure in the atmosphere. B) Air flows from the area of higher pressure in the alveoli to the area of lower pressure in the atmosphere. C) All the above. D) None of the above. Show Answer Correct Answer: B) Air flows from the area of higher pressure in the alveoli to the area of lower pressure in the atmosphere. 2. If there is inflammation of pleural membranes ..... What will happen? A) No effect. B) Increased friction between between 2 pleura. C) Decreased friction between 2 pleura. D) No pain. Show Answer Correct Answer: B) Increased friction between between 2 pleura. 3. What is the process of breaking down food using oxygen called? A) Fermentation. B) Digestion. C) Oxidation. D) Respiration. Show Answer Correct Answer: C) Oxidation. 4. It is known that exposure to carbon monoxide is harmful to animal because A) It reduces CO$_{2}$ transport. B) It reduces O$_{2}$ transport. C) It increases CO$_{2}$ transport. D) It increases O$_{2}$ transport. Show Answer Correct Answer: B) It reduces O$_{2}$ transport. 5. Which of the following statements is true about Trachea in a respiratory system? (a) It functions as passages of air to each alveolus (b) It functions for sound production (c) It Acts as passage of air to bronchi (d) It Lowers the surface tension A) It functions as passages of air to each alveolus. B) It functions for sound production. C) It Acts as passage of air to bronchi. D) It Lowers the surface tension. Show Answer Correct Answer: C) It Acts as passage of air to bronchi. 6. Arrange the following components of pulmonary volume in the order of their increasing values. (I) Tidal volume (II) Residual volume (III)Expiratory reserve volume (IV)Vital capacity. Choose the correct option: A) I < II < III < IV. B) I < IV < III < II. C) I < III < II < IV. D) I < IV < II < III. Show Answer Correct Answer: C) I < III < II < IV. 7. Which animal breathe through lungs? A) Dragonfly. B) Jellyfish. C) Turtle. D) Crab. Show Answer Correct Answer: C) Turtle. 8. Trachea is lined with incomplete rings of: A) Fibrous cartilage. B) Calcified cartilage. C) Elastic cartilage. D) Hyaline cartilage. Show Answer Correct Answer: D) Hyaline cartilage. 9. Which is not true . A) PCO2 of deoxygenated blood is 95 mm Hg. B) PCO2 of alveolar air is 40 mm Hg. C) PO2 alveolar air is 104 mm Hg. D) PO2 of oxygenated blood is 95 mm Hg. Show Answer Correct Answer: A) PCO2 of deoxygenated blood is 95 mm Hg. 10. Select the correct events that occur during inspiration. I. Contraction of diaphragm. II. Contraction of external inter-costal muscles. III. Pulmonary volume decreases. IV. Intra pulmonary pressure increases. A) III and IV. B) I, II and IV. C) Only IV. D) I and II. Show Answer Correct Answer: D) I and II. 11. Each lung is covered by a double-layered protective covering called A) Pleural fluid. B) Pleural membrane. C) Pulmonary membrane. D) Ribs. Show Answer Correct Answer: B) Pleural membrane. 12. Oxygen diffuses from A) Trachea to lung. B) Alveolus to blood capillary. C) Blood capillary to alveolus. D) Lung to trachea. Show Answer Correct Answer: B) Alveolus to blood capillary. 13. What is the main function of the respiratory system? A) To provide oxygen and remove carbon dioxide from the body. B) To bring oxygen to the body. C) To break down food and absorb nutrients. D) To remove oxygen from the body and deliver carbon dioxide. Show Answer Correct Answer: A) To provide oxygen and remove carbon dioxide from the body. 14. Sites of gaseous exchange in lungs are- A) Alveoli. B) Tracheoles. C) Bronchioles. D) Pleura. Show Answer Correct Answer: A) Alveoli. 15. What pressure gradient is exhalation triggered by? A) The pressure in the lungs is less than the pressure of the atmosphere. B) The pressure in the lungs is greater than the pressure of the atmosphere. C) All the above. D) None of the above. Show Answer Correct Answer: B) The pressure in the lungs is greater than the pressure of the atmosphere. 16. Partial pressure of oxygen in alveolar air is ..... A) 45 mmHg. B) 125 mm Hg. C) 100 mmHg. D) 104 mmHg. Show Answer Correct Answer: D) 104 mmHg. 17. What is the red coloured iron containing pigment present in RBCs? A) Myoglobin. B) Chlorophyll. C) Haemoglobin. D) Melanin. Show Answer Correct Answer: C) Haemoglobin. 18. Which diseases do not occur due to infection of bacteria or virus? A) Pneumonia. B) Asbestosis. C) Bronchitis. D) All of the above. Show Answer Correct Answer: B) Asbestosis. 19. Number of lobes present in human lungs: A) 3 in right lung and 2 in left lung. B) 2 in right lungs and 3 in left lung. C) 2 in right lungs and 2 in left lung. D) 3 in right lung and 1 in left lung. Show Answer Correct Answer: A) 3 in right lung and 2 in left lung. 20. Chemical receptors checks amount of ..... in blood. A) CO2, O2. B) CO2, O2 and pH. C) CO2. D) O2. Show Answer Correct Answer: B) CO2, O2 and pH. 21. Tidal volume and respiratory reserve volume of an athlete 500 ml and 1000 ml respectively what will be his respiratory capacity if the residual volume is 1200 ml? A) 2700 ml. B) 1500 ml. C) 1700 ml. D) 2200 ml. Show Answer Correct Answer: B) 1500 ml. 22. A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O2 A) Acts as a reserve during muscular exercise. B) Raises the pCO2 of blood to 75 mm of Hg. C) Is enough to keep oxyhaemoglobin saturation at 96%. D) Helps in releasing more O2 to the epithelial tissues. Show Answer Correct Answer: A) Acts as a reserve during muscular exercise. 23. Alveoli have a ..... A) Moist lining for dissolving gases. B) Dry lining for dissolving gases. C) Moist lining for dissolving glucose. D) Dry lining for dissolving glucose. Show Answer Correct Answer: A) Moist lining for dissolving gases. 24. What happens when the intercostals contract during inhalation? A) The diaphragm relaxes. B) The ribs are elevated. C) Pressure in the lungs increases. D) The size of the thoracic cavity decreases. Show Answer Correct Answer: B) The ribs are elevated. 25. Maximum amount of oxygen is lost from the blood in the A) Capillaries surrounding the tissue cells. B) Arteries of the body. C) Capillaries surrounding the alveoli. D) Left auricle of the heart. Show Answer Correct Answer: C) Capillaries surrounding the alveoli. ← PreviousNext →Related QuizzesClass 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 1Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 2Class 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 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books