This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli. A) HighpO2, lowpCO2, less H+, lower temperature. B) LowpO2, highpCO2, more H+, higher temperature. C) HighpO2, highpCO2, less H+, higher temperature. D) LowpO2, lowpCO2, more H+, higher temperature. Show Answer Correct Answer: A) HighpO2, lowpCO2, less H+, lower temperature. 2. When P50 value in blood rises, the affinity of respiratorypigment to combine with O2 will- A) Remain same. B) Rise. C) Fall. D) First rise and then fall. Show Answer Correct Answer: C) Fall. 3. Dissociation of oxyhaemoglobin in blood increases when there is A) Increase in pH and decrease in CO$_{2}$ concentration. B) Decrease in temperature and increase in O$_{2}$ concentration. C) Increase in CO$_{2}$ concentration. D) Decrease in pH and increase in CO$_{2}$ concentration. Show Answer Correct Answer: D) Decrease in pH and increase in CO$_{2}$ concentration. 4. At rest cardiac output is 5L / min, how much CO$_{2}$ is delivered to the lungs to be exhaled each minute? A) 4 ml / min. B) 200 ml / min. C) 5 ml / min. D) 1.34 ml / min. Show Answer Correct Answer: B) 200 ml / min. 5. It is known that exposure to carbon monoxide is harmful to animals 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. 6. Branchial respiration is present in: A) Amphibians. B) Fishes. C) Reptiles. D) Aves. Show Answer Correct Answer: B) Fishes. 7. What is the approximate normal composition of alveolar air? A) 14% oxygen, 6% carbon dioxide, 80% nitrogen. B) 21% oxygen, 2% carbon dioxide, 77% nitrogen. C) 16% oxygen, 3% carbon dioxide, 81% nitrogen. D) 10% oxygen, 8% carbon dioxide, 82% nitrogen. Show Answer Correct Answer: A) 14% oxygen, 6% carbon dioxide, 80% nitrogen. 8. C shaped cartilagenous rings are absent in: A) Initial bronchioles. B) Respiratory bronchioles. C) Terminal bronchioles. D) Both b and c. Show Answer Correct Answer: D) Both b and c. 9. Rate of breathing is controlled by A) The amount of freely available oxygen. B) Amount of carbon dioxide. C) Muscular function of the body. D) Stress. Show Answer Correct Answer: B) Amount of carbon dioxide. 10. Lungs are comprised by- A) Only alveoli. B) Pleura. C) Different types of bronchi. D) Network of bronchi, bronchioles and alveoli. Show Answer Correct Answer: D) Network of bronchi, bronchioles and alveoli. 11. Which one of the following is called inspiratory muscle in mammals? A) Internal interchondral muscle. B) Pleural muscle. C) Radial muscle. D) External intercostal muscle. Show Answer Correct Answer: D) External intercostal muscle. 12. Amphibians e.g. frogs respire- A) A, Through moist skin. B) B. Lungs. C) Both a and b. D) Only b. Show Answer Correct Answer: C) Both a and b. 13. During transport of carbon dioxide why blood does not become acidic? A) Due to neutralization of H2CO3 by Na2CO3. B) Due to absorption of leukocytes. C) Due to presence of blood buffer. D) None of the above. Show Answer Correct Answer: C) Due to presence of blood buffer. 14. The carbon dioxide is transported via blood to lungs as A) Dissolved in blood plasma. B) In the form of carbonic acid only. C) In combination with haemo globin only. D) Carbamino haemoglobin and as carbonic acid. Show Answer Correct Answer: D) Carbamino haemoglobin and as carbonic acid. 15. Contraction and relaxation of diaphragm is sequentially connected with which process? A) Exhalation-Inhalation. B) Inhalation-Inhalation. C) Inhalation-Exhalation. D) Exhalation-Exhalation. Show Answer Correct Answer: C) Inhalation-Exhalation. 16. Gas exchange in animals always involves- A) Anaerobic cellular respiration. B) Diffusion across membranes. C) Active transport of gases. D) None. Show Answer Correct Answer: B) Diffusion across membranes. 17. Primary trachea further showing braching A) 5. B) 4. C) 3. D) 2. Show Answer Correct Answer: A) 5. 18. Lungs are madeup of air filled sacs, the alveoli. they donot collapse even after foreful expiration, because of ..... ? A) RV. B) IRV. C) TV. D) ERV. Show Answer Correct Answer: A) RV. 19. What is the maximum amount of air the lungs can hold called? A) Vital Capacity. B) Residual Volume. C) Total Lung Capacity. D) Inspiratory Capacity. Show Answer Correct Answer: C) Total Lung Capacity. 20. The urge to inhale in humans results from A) Rising pCO2. B) Rising pO2. C) Falling pCO2. D) Falling pO2. Show Answer Correct Answer: A) Rising pCO2. 21. Total volume of air, normaly inhalation and forcefully taken is ..... A) ERV. B) IRV. C) RV. D) IC. Show Answer Correct Answer: D) IC. 22. Fetal haemoglobin has X affinity for oxygen than that of mother's haemoglobin during gastation. X is A) Same. B) Higher. C) Lower. D) Lower affinity earlier but higher later. Show Answer Correct Answer: B) Higher. 23. Asthma is caused by- A) Infections of lungs. B) Infections of trachea. C) Spasm in bronchial muscles. D) Infection in nose. Show Answer Correct Answer: C) Spasm in bronchial muscles. 24. Every 100 ml of oxygenated blood delivers following amount of O$_{2}$ to the tissues under normal physiological condition A) 5 ml. B) 25 ml. C) 50 ml. D) More the 50 ml. Show Answer Correct Answer: A) 5 ml. 25. Which controls the volume of pulmonary cavity: A) Thoracic cavity. B) Abdominal cavity. C) Diaphragm. D) Muscles. Show Answer Correct Answer: A) Thoracic cavity. ← 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 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