This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Rate of breathing is controlled mainly by A) CO2 level in blood. B) PH in blood. C) O2 level in blood. D) O2 level and pH in blood. Show Answer Correct Answer: A) CO2 level in blood. 2. The maximum volume of air a person can breathe in after a forced expiration is known as: A) Total Lung Capacity. B) Expiratory Capacity. C) Vital Capacity. D) Inspiratory Capacity. Show Answer Correct Answer: C) Vital Capacity. 3. A section of an alveolus with a pulmonary capillary indicates the presence of major layers constituting diffusion membrane- A) 3. B) 2. C) 6. D) 10. Show Answer Correct Answer: A) 3. 4. The maximum volume of air you can forcefully exhale after taking the deepest possible breath is called A) Tidal volume. B) Total respiratory volume. C) Residual volume. D) Vital capacity. Show Answer Correct Answer: D) Vital capacity. 5. Mark the true statement among the following with reference to normal breathing. A) Inspiration is a passive process whereas expiration is active. B) Inspiration is a active process whereas expiration is passive. C) Inspiration and expiration are active processes. D) Inspiration and expiration are passive processes. Show Answer Correct Answer: B) Inspiration is a active process whereas expiration is passive. 6. The tissue respiration refers to: A) Inspiration. B) Expiration. C) External respiration. D) Internal respiration. Show Answer Correct Answer: D) Internal respiration. 7. The affinity of Hb for O$_{2}$ is A) Decreased in metabolizing tissue. B) Increased at higher body temperature. C) Increase at higher than normal 2, 3 DPG levels. D) Decreased at more basic than normal pH. Show Answer Correct Answer: A) Decreased in metabolizing tissue. 8. Total volume of lungs: A) 5L. B) 6L. C) 5.5L. D) 4L. Show Answer Correct Answer: B) 6L. 9. What is the primary function of blood in relation to O2 and CO2? A) Transport of nutrients. B) Regulation of body temperature. C) Defense against infections. D) Transport of O2 and CO2. Show Answer Correct Answer: D) Transport of O2 and CO2. 10. Trachea is internally lined by A) Cilliated epithelium. B) Cilliated columnar epithelium. C) Both. D) None. Show Answer Correct Answer: B) Cilliated columnar epithelium. 11. Right primary trachea is divided into ..... secondary trachea A) 2. B) 3. C) 8. D) 10. Show Answer Correct Answer: B) 3. 12. When temperature decreases, oxy-Hb curve becomes A) More steep. B) Straight. C) Parabola. D) None of these. Show Answer Correct Answer: A) More steep. 13. Whether a child died after birth or died before birth can be confirmed by measuring: A) Weight of child. B) Residual volume. C) Dead space volume. D) Tidal volume. Show Answer Correct Answer: B) Residual volume. 14. CO$_{2}$ dissociates from carbaminohaemoglobin when A) PCO$_{2}$ is high and pO$_{2}$ is low. B) PO$_{2}$ is high and pCO$_{2}$ is low. C) PCO$_{2}$ and pO$_{2}$ are equal. D) None of the above. Show Answer Correct Answer: B) PO$_{2}$ is high and pCO$_{2}$ is low. 15. What is the reversible form of O2 when it binds with haemoglobin? A) Carboxyhaemoglobin. B) Deoxyhaemoglobin. C) Methaemoglobin. D) Oxyhaemoglobin. Show Answer Correct Answer: D) Oxyhaemoglobin. 16. Trachea divides into right and left primary bronchi at ..... th thoracic vertebra. A) 4. B) 5. C) 6. D) 9. Show Answer Correct Answer: B) 5. 17. What is proper for left bronchus compared to right bronchus? A) Narrow. B) Most straight. C) Short. D) B and c. Show Answer Correct Answer: A) Narrow. 18. If P$_{atm}$ = 0 mm Hg and P$_{alv}$ =-2 mm Hg, then A) It is the end of the normal inspiration and there is no airflow. B) It is the end of the normal expiration and there is no airflow. C) Transpulmonary pressure (P$_{tp}$) is-2 mm Hg. D) Air is flowing into the lungs. Show Answer Correct Answer: D) Air is flowing into the lungs. 19. A person has vital capacity of 5L and residual volume of 1.2 L. Total lung capacity- A) 6.2 L. B) 4.8 L. C) 500 ml. D) None. Show Answer Correct Answer: A) 6.2 L. 20. All of the following favour the dissociation of oxyhaemoglobin to deliver O$_{2}$ to tissues except- A) PO2 = $\uparrow$. B) PCO2 = $\uparrow$ $\uparrow$. C) Temperature = $\uparrow$. D) PO2 = $\updownarrow$. Show Answer Correct Answer: A) PO2 = $\uparrow$. 21. Inhale!!!My lungs ..... A) Got Smaller. B) Got Bigger. C) All the above. D) None of the above. Show Answer Correct Answer: B) Got Bigger. 22. Exchange of gases between alveoli and blood occurs by A) Active transport. B) Diffusion. C) Facilitated transport. D) Co-transport. Show Answer Correct Answer: B) Diffusion. 23. What would happen if human blood becomes acidic (low pH)? A) Oxygen-carying capacity of haemoglobin decreases. B) RBC count decreases. C) RBC count increases. D) Oxygen-carrying capacity of haemoglobin increases. Show Answer Correct Answer: A) Oxygen-carying capacity of haemoglobin decreases. 24. The part that helps reducing the friction on the lung surface A) Peura. B) Ribs. C) Diaphragm. D) Pleura. Show Answer Correct Answer: D) Pleura. 25. Among the following the partial pressure of oxygen is maximum in A) Alveolar air. B) Arterial blood. C) Venous blood. D) Expired air. Show Answer Correct Answer: D) Expired air. ← 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 10Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books