This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The greatest quantity of air that can be expired after a maximum inspiratory effort is its ..... A) Residual volume. B) Tidal volume. C) Vital capacity. D) Lung volume. Show Answer Correct Answer: C) Vital capacity. 2. The oxygen haemoglobin dissociation curve will show a right shift in case of A) High pCO2. B) High pO2. C) Low pCO2. D) Less H + concentration. Show Answer Correct Answer: A) High pCO2. 3. The partial pressures(in mmHg)of oxygen(O2 )and carbon dioxide (CO2 )at alveoli(the site of diffusion) (a)pO2 =104 andpCO2 =40 (b)pO2 =40 andpCO2 =45 (c)pO2 =95 andpCO2 = 40 (d)pO2 =159 andpCO2 =0.3 A) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 4. Carbon dioxide reacts with water in RBC to form carbonic acid .what is responsible for it? A) Carbonic anhydrase. B) Carboxypeptidase. C) Hydrolyse. D) Oxido reductase. Show Answer Correct Answer: A) Carbonic anhydrase. 5. In the tissues, high concentrations of carbon dioxide A) Increases the affinity of haemoglobin to both oxygen and hydrogen. B) Increases its affinity of haemoglobin to oxygen but decreases its affinity to hydrogen. C) Decreases the affinity of haemoglobin to oxygen but increases its affinity to hydrogen. D) Decreases the affinity of haemoglobin to both oxygen and hydrogen. Show Answer Correct Answer: C) Decreases the affinity of haemoglobin to oxygen but increases its affinity to hydrogen. 6. How is CO2 carried by haemoglobin? A) As carbamino-haemoglobin. B) As oxy-haemoglobin. C) As deoxy-haemoglobin. D) As methaemoglobin. Show Answer Correct Answer: A) As carbamino-haemoglobin. 7. In man and mammals, air passes from outside into the lungs through A) Nasal cavity, larynx, pharynx, larynx, trachea, bronchi, alveoli. B) Nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoli. C) Nasal cavity, larynx, pharynx, trachea, bronchioles, alveoli. D) Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli. Show Answer Correct Answer: D) Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli. 8. Which one of the following statement is incorrect? A) The principal of countercurrent flow facilitates efficient respiration in gills of fishes. B) The residual air in lungs slightly decreases the efficiency of respiration in mammals. C) The presence of non-respiratory air sacs, increases the efficiency of respiration in birds. D) In insects, circulating body fluids serve to distribute oxygen to tissues. Show Answer Correct Answer: D) In insects, circulating body fluids serve to distribute oxygen to tissues. 9. Which of the following options is incorrect about the larynx (sound box)? A) It is a bony box. B) Glottis is the opening into the larynx. C) During swallowing of food glottis is covered by epiglottis to prevent food entry into the larynx. D) All of these. Show Answer Correct Answer: A) It is a bony box. 10. Which of the following is the respiratory organ of scorpion? A) Ctenidia. B) Lungs. C) Book lungs. D) Gills. Show Answer Correct Answer: C) Book lungs. 11. Which of the following is NOT a function of the lungs? A) Metabolism. B) Serves as a reservoir of blood for the left ventricle. C) It is a filter to protect the systemic vasculature. D) All of the above are true. Show Answer Correct Answer: D) All of the above are true. 12. Exchange of gases- A) Occurs between the alveoli and pulmonary blood capillary. B) Occurs between blood and tissues. C) By diffusion. D) All. Show Answer Correct Answer: D) All. 13. The largest proportion of CO$_{2}$ carried by blood is in the form of- A) Molecular CO$_{2}$ dissolved in the plasma. B) Bicarbonates (HCO$_{3}$$^{-}$ ) carried within RBCs. C) HCO$_{3}$$^{-}$ carried in the plasma. D) Molecular CO$_{2}$ chemically bound to haemoglobin. Show Answer Correct Answer: C) HCO$_{3}$$^{-}$ carried in the plasma. 14. Oxygen dissociation curve is- A) J-shaped. B) S-shaped. C) L-shaped. D) Zig-zag. Show Answer Correct Answer: B) S-shaped. 15. CO$_{2}$ dissociates from carbamino haemoglobin when A) PCO2 is high and pO2 is low. B) PO2 is high and pCO2 is low. C) PCO2 and pO2 are equal. D) None of the above. Show Answer Correct Answer: B) PO2 is high and pCO2 is low. 16. Given below are few respiratory disorders. Identify occupational respiratory disorders among these.i) Coryza ii) SARSiii) Silicosis iv) Asbestosis v) Emphysema A) (i) and (ii). B) (i) and (v). C) (iii) and (iv). D) (i), (ii) and (v). Show Answer Correct Answer: C) (iii) and (iv). 17. The vital capacity of the lung signifies the volume of air breathed in: A) During normal inspiration. B) With forcible expiration. C) With forcible inspiration. D) With deep inspiration and exhaled out by forcible expiration. Show Answer Correct Answer: D) With deep inspiration and exhaled out by forcible expiration. 18. After deep inspiration, maximum expiration of lungs is called A) TLC. B) IC. C) EC. D) VC. Show Answer Correct Answer: D) VC. 19. The maximum volume of air contained in the lung by a full forced inhalation is called(a) Vital capacity(b) Tidal volume(c) Total lung capacity(d) Inspiratory capacity A) Vital capacity. B) Tidal volume. C) Total lung capacity. D) Inspiratory capacity. Show Answer Correct Answer: C) Total lung capacity. 20. Epiglottis is a- A) Bony flap. B) Cartilaginous flap. C) Half bony half cartilaginous. D) Made up of only muscles. Show Answer Correct Answer: B) Cartilaginous flap. 21. Regarding the function of conducting system, mark the wrong entry? A) Brings the air to body temperature. B) Warms up the air. C) Diffusion of gases. D) Cleans up the air. Show Answer Correct Answer: C) Diffusion of gases. 22. Air pathway in conducting zone: A) Trachea$\rightarrow$lungs$\rightarrow$larynx$\rightarrow$pharynx$\rightarrow$alveoli. B) Nose$\rightarrow$larynx$\rightarrow$pharynx$\rightarrow$bronchus$\rightarrow$alveoli$\rightarrow$bronchioles. C) Nostrils$\rightarrow$pharynx$\rightarrow$larynx$\rightarrow$trachea$\rightarrow$bronchi$\rightarrow$bronchiles$\rightarrow$alveoli. D) Nose$\rightarrow$mouth$\rightarrow$lungs. Show Answer Correct Answer: C) Nostrils$\rightarrow$pharynx$\rightarrow$larynx$\rightarrow$trachea$\rightarrow$bronchi$\rightarrow$bronchiles$\rightarrow$alveoli. 23. Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure achieved when- A) Intrapulmonary pressure is less than the atmospheric pressure. B) Intrapulmonary pressure is greater than the atmospheric pressure. C) Intrapulmonary pressure is equal to the atmospheric pressure. D) Intrapleural pressure becomes more than the intraalveolar pressure. Show Answer Correct Answer: A) Intrapulmonary pressure is less than the atmospheric pressure. 24. What percentage of carbon dioxide transport in the form of carbamino haemoglobin? A) 10-15%. B) 50-60%. C) 20-25%. D) 40-50%. Show Answer Correct Answer: C) 20-25%. 25. Which one of the following is not correct regarding Thoracic chamber? A) It is an air tight chamber. B) It is formed dorsally by vertebral column. C) It is formed ventrally by clavicle . D) Formed by Diaphragm on lower side. Show Answer Correct Answer: C) It is formed ventrally by clavicle . ← 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