This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Incomplete cartilaginous rings support all of the following except- A) Trachea. B) Primary, secondary and tertiary bronchi. C) Respiratory bronchioles. D) Initial bronchioles. Show Answer Correct Answer: C) Respiratory bronchioles. 2. High percentage of CO2 and very low percentage of O2 may make a person unconscious due to ..... A) Eupnoea. B) Emphysema. C) Suffocation. D) Asphyxia. Show Answer Correct Answer: D) Asphyxia. 3. The rib cage expands. A) Inhalation. B) Exhalation. C) All the above. D) None of the above. Show Answer Correct Answer: A) Inhalation. 4. Chemosensitive area of respiratory centre in medulla is affected by A) Less CO2 and H+ ions. B) Less O2 and H+ions. C) Excess CO2 and H+ions. D) Excess O2 and H+ ions. Show Answer Correct Answer: C) Excess CO2 and H+ions. 5. Amphibia respire by A) Skin and book gills. B) Lungs and skin. C) Lungs and tracheal system. D) Lungs and flame cell. Show Answer Correct Answer: B) Lungs and skin. 6. Exchange of O2 and CO2 between blood and tissue cells occurs by ..... A) Cerebrospinal fluid. B) Coelomic fluid. C) Intercellular fluid. D) Lymph. Show Answer Correct Answer: C) Intercellular fluid. 7. A contraction of the diaphragm during inhalation causes it to flatten. What else does the contraction result in? A) An increase in the volume of the thoracic cavity. B) Increase in alveolar pressure. C) A decrease in lung volume. D) A decrease in the volume of the thoracic cavity. Show Answer Correct Answer: A) An increase in the volume of the thoracic cavity. 8. Skin is an accessory organ of respiration in ..... A) Humans. B) Frog. C) Rabbit. D) Lizard. Show Answer Correct Answer: B) Frog. 9. Although much CO2 is carried in blood yet blood does not become acidic, because A) CO2 absorbed by the leucocytes. B) Oxygen combines with haemoglobin to form oxyhaemoglobin. C) CO2 transport and blood buffers play an important role in it. D) It is continuously diffused through the tissues and is not allowed to accumulate. Show Answer Correct Answer: C) CO2 transport and blood buffers play an important role in it. 10. The blue baby syndrome results from A) Excess of dissolved oxygen. B) Excess of TDS. C) Excess of chloride. D) Methaemoglobin. Show Answer Correct Answer: D) Methaemoglobin. 11. The linings that separate air contained in lungs from venous blood A) Squamous epithelium and tunica media. B) Squamous epithelium and endothelium. C) Transitional epithelium and tunica externa. D) None of the above. Show Answer Correct Answer: B) Squamous epithelium and endothelium. 12. A chamber behind the nose and mouth that leads to the trachea A) Pharynx. B) Trachea. C) Epiglottis. D) Larynx. Show Answer Correct Answer: A) Pharynx. 13. Alveolar epidermis of lung is formed of ..... A) Non ciliated columnar. B) Non ciliated squamous. C) Ciliated columnar. D) Ciliated squamous. Show Answer Correct Answer: B) Non ciliated squamous. 14. In brain, respiratory control centre lies in(a) pons(b) medulla oblongata(c) hypothalamus(d) cerebrum A) A) pons. B) B) medulla oblongata. C) C) hypothalamus. D) (d) cerebrum. Show Answer Correct Answer: B) B) medulla oblongata. 15. The function of pneumotaxic centre is(a) regulate inspiration(b) regulate rhythm(c) increase heart rate(d) all of the above A) (a) regulate inspiration. B) (b) regulate rhythm. C) (c) increase heart rate. D) D) all of the above. Show Answer Correct Answer: A) (a) regulate inspiration. 16. Which of the following represents a larger volume of air than is normally found in the resting tidal volume of a human lung? A) Residual volume. B) Inspiratory reserve volume. C) Expiratory reserve volume. D) All. Show Answer Correct Answer: D) All. 17. Site of gaseous exchange in tadpole larva is A) Skin. B) Gills. C) Lungs. D) Buccapharyngeal cavity. Show Answer Correct Answer: B) Gills. 18. Which of the following is true about the haemoglobin of a human foetus? A) It has a higher affinity for oxygen than that of an adult. B) It has a lower affinity for oxygen than that of the adult. C) Its affinity for oxygen is the same as that of an adult. D) It has only 2 protein subunits instead of 4. Show Answer Correct Answer: A) It has a higher affinity for oxygen than that of an adult. 19. Book lungs are respiratory organs of- A) Scorpion. B) Pila. C) Spider. D) Both A and C. Show Answer Correct Answer: D) Both A and C. 20. In expiration, diaphragm becomes ..... A) Flattened. B) Relaxed. C) Straightened. D) Arched/ Dome-shaped. Show Answer Correct Answer: B) Relaxed. 21. The enzyme that increases the reaction rate between CO2 and H2O in red blood cells is A) Carbonic anhydrase. B) Adenylate cyclase. C) Carbonic synthetase. D) Alkaline phosphatase. Show Answer Correct Answer: A) Carbonic anhydrase. 22. Complete the following sentence by selecting the correct option.Receptors associated with aortic arch and carotid artery can recognise changes in (i) and (ii) concentration and send necessary signals to (iii) for remedial actions. A) (i) O2 (ii) CO2 (iii) pneumotaxic centre. B) (i) CO 2 (ii) H + (iii) rhythm centre. C) (i) CO 2 (ii) H + (iii) apneustic centre. D) (i) O2 (ii) H + (iii) pneumotaxic centre. Show Answer Correct Answer: B) (i) CO 2 (ii) H + (iii) rhythm centre. 23. Which is false? ..... a) Blood from right side of heart is carried to lungs by pulmonary arteryb) Pleura is double covering of kidney c) Pancreas is both exocrine and endocrine glandd) Scurvy is due to vitamin C deficiency A) Blood from right side of heart is carried to lungs by pulmonary artery. B) Pleura is double covering of kidney. C) Pancreas is both exocrine and endocrine gland. D) Scurvy is due to vitamin C deficiency. Show Answer Correct Answer: B) Pleura is double covering of kidney. 24. The small tree-like branches coming of the bronchi are the ..... A) Trachea. B) Branches. C) Bronchioles. D) Pharynx. Show Answer Correct Answer: C) Bronchioles. 25. What is the primary function of the epiglottis? A) To prevent food from entering the trachea. B) To produce sound. C) To filter air. D) To exchange gases. Show Answer Correct Answer: A) To prevent food from entering the trachea. ← 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