This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. CO$_{2}$ is transported- A) By RBC. B) As bicarbonates. C) In a dissolved state through plasma. D) All. Show Answer Correct Answer: D) All. 2. Which structure prevents food from entering the trachea during swallowing? A) Larynx. B) Pharynx. C) Epiglottis. D) Bronchi. Show Answer Correct Answer: C) Epiglottis. 3. What structure do RBCs move through single file? A) Venule. B) Capillary. C) Arteriole. D) Artery. Show Answer Correct Answer: B) Capillary. 4. Statements1) Carbonic anhydrase is present in the erythrocytes.2) In erythrocytes the carbon dioxide combine with water and is transported. A) Statement 1 is correct and is responsible for statement 2. B) Statement 1 is not correct but statement 2 is correct. C) Both statement 1 and 2 are wrong. D) Statement 1 is correct but not involved in statement 2. Show Answer Correct Answer: B) Statement 1 is not correct but statement 2 is correct. 5. Additional muscles in the ..... impacts the ability of humans to increase the strength of inspiration and expiration. Complete the given statement with an appropriate option. A) Abdomen. B) Lungs. C) Diaphragm. D) Chest. Show Answer Correct Answer: A) Abdomen. 6. Switch off center of breathing lies in A) Medulla oblongata. B) Carotid bodies. C) Hypothalamus. D) Pons. Show Answer Correct Answer: D) Pons. 7. Thechamberformeddorsallybythevertebralcolumn, ventrallybysternum, laterallybyribsandonth~1qwe[sidebydome-shaped diaphragm is- A) Lung cavity. B) Pulmonary cavity. C) Abdominal cavity. D) Thoracic cavity. Show Answer Correct Answer: D) Thoracic cavity. 8. Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because:- A) There is a positive intrapleural pressure. B) Pressure in the lungs is higher than the atomospheric pressure. C) There is a negative pressure in the lungs. D) There is a negative intrapleural pressure pulling at the lung walls. Show Answer Correct Answer: D) There is a negative intrapleural pressure pulling at the lung walls. 9. Larynx is made up of ..... cartilages. Out of Epiglottis is made up of ..... cartilage. Adam's Apple is an extension of ..... cartilage. A) 9, hyaline, thyroid. B) 9, Elastic, thyroid. C) 11, hyaline, thyroid. D) 9, Elastic, epiglottis. Show Answer Correct Answer: B) 9, Elastic, thyroid. 10. A large proportion of oxygen is left unused in the human blood even after uptake by the body tissue. This oxygen A) Is enough to keep oxyhaemoglobin saturation at 96%. B) Raise pCO2 of blood to 75 mmHG. C) Helps in releasing more oxygen to epithelial tissues. D) Acts as reserve during muscular exercise. Show Answer Correct Answer: D) Acts as reserve during muscular exercise. 11. What is the primary transporter of O2 in the blood? A) White blood cells. B) Red blood cells. C) Plasma. D) Platelets. Show Answer Correct Answer: B) Red blood cells. 12. The CO2 content by volume, in the atmospheric air is about A) 3.34%. B) 0.0314%. C) 4%. D) 2.1%. Show Answer Correct Answer: B) 0.0314%. 13. Which region of nasal chamber is near to internal nares? A) Pre olfactory region. B) Respiratory region. C) A and b. D) Olfactory region. Show Answer Correct Answer: D) Olfactory region. 14. What is the term for the volume of air that remains in the lungs after a forcible expiration? A) Expiratory Reserve Volume. B) Inspiratory Reserve Volume. C) Residual Volume. D) Tidal Volume. Show Answer Correct Answer: C) Residual Volume. 15. In earthworm respiration is by A) Tracheal systems. B) Tube feets. C) Lungs. D) Skin. Show Answer Correct Answer: D) Skin. 16. What would happen if human blood becomes acidic (pH lowers)? A) Oxygen carrying capacity of the hemoglobin decreases. B) RBC count decreases. C) Oxygen carrying capacity of the hemoglobin increases. D) RBC count increases. Show Answer Correct Answer: A) Oxygen carrying capacity of the hemoglobin decreases. 17. What is the tidal volume in an adult human? A) 500 mL. B) 6000 mL. C) 1100 mL. D) 2000 mL. Show Answer Correct Answer: A) 500 mL. 18. Expiratory capacity is equal to- A) ERV + IRV. B) TV + ERV. C) ERV + RV. D) ERV + RV. Show Answer Correct Answer: B) TV + ERV. 19. Which one of the following options correctly represents the lung conditions in asthma and emphysema, respectively? A) Decreased respiratory surface; Inflammation of bronchioles. B) Increased number of bronchioles; Increased respiratory surface. C) Inflammation of bronchioles; Decreased respiratory surface. D) Increased respiratory surface; Inflammation of bronchioles. Show Answer Correct Answer: C) Inflammation of bronchioles; Decreased respiratory surface. 20. About 97% of oxygen is transported by RBC, then remaining 3% is ..... A) Retained in lungs. B) Dissolved in plasma and transported. C) Attached to cell membrane. D) Inside mitochondria. Show Answer Correct Answer: B) Dissolved in plasma and transported. 21. The diaphragm becomes dome shaped. A) Inhalation. B) Exhalation. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exhalation. 22. During normal respiration the ventral respiratory group located in the medulla oblongata ..... ? A) Establish the basic respiratory rhythm. B) Controls the switch off point of inspirato n. C) Excites chemosensitive zone nuerons. D) Remains inactive. Show Answer Correct Answer: D) Remains inactive. 23. ..... lies in front of esophagus.(a) Trachea(b) Glottis(c) Larynx(d) Epiglottis A) Larynx. B) Trachea. C) Glottis. D) Epiglottis. Show Answer Correct Answer: B) Trachea. 24. Each molecule of haemoglobin when fully saturated carries how many molecules of O$_{2}$- A) 20. B) 2. C) 4. D) 1. Show Answer Correct Answer: C) 4. 25. Mark the correct pair of muscles involved in the normal breathing in humans. A) External and internal intercostals muscles. B) Diaphragm and abdominal muscles. C) Diaphragm and external intercostals muscles. D) Diaphragm and intercostals muscles. Show Answer Correct Answer: D) Diaphragm and intercostals muscles. 26. Which animal comes in class Amphibia A) Rana. B) Rohu. C) Lizard. D) Periplaneta. Show Answer Correct Answer: A) Rana. 27. Which of them is not a part of lungs A) BRONCHI. B) TRACHEA. C) ALVEOLI. D) NONE OF THE ABOVE. Show Answer Correct Answer: B) TRACHEA. 28. At respiring tissues, why does an increase in pCO$_{2}$ cause hemoglobin to have a decreased affinity for oxygen?I. H$^{+}$ bind to hemoglobin causing a shape changeII. CO$_{2}$ dissolves in blood plasma to form carbonic acidIII. CO$_{2}$ removes the heme groups from hemoglobin A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: A) I and II only. 29. We can test the presence of carbon dioxide in exhaled air by bubbling it into ..... A) Limewater. B) Lime juice. C) Lime. D) Water. Show Answer Correct Answer: A) Limewater. 30. External intercostals contract. A) Inhalation. B) Exhalation. C) All the above. D) None of the above. Show Answer Correct Answer: A) Inhalation. 31. Emphysema is a condition resulting from A) Reduced oxygen carrying capacity of blood. B) Cigarette smoking. C) Liquor consumption. D) Drug addiction. Show Answer Correct Answer: B) Cigarette smoking. 32. Besides RBC, blood plasma also carries O2 in solution.The percentage is A) 2-3%. B) 3-6%. C) 3-9%. D) 1-2%. Show Answer Correct Answer: A) 2-3%. 33. What if human blood becomes acidic (low pH)? A) Decreased red blood cell count. B) The oxygen-carrying capacity of hemoglobin is increased. C) Increased red blood cell count. D) The oxygen-carrying capacity of hemoglobin is reduced. Show Answer Correct Answer: D) The oxygen-carrying capacity of hemoglobin is reduced. 34. Which of these is a respiratory disease? A) Bronchitis. B) Hemophilia. C) Epilepsy. D) Hypertension. Show Answer Correct Answer: A) Bronchitis. 35. Pick the incorrect statement A) In insects, circulating body fluids serve to distribute oxygen to tissues. B) The residual air in the lungs slightly decreases the efficiency of respiration in mammals. C) The principle of counter current flow facilitates efficient respiration in gills of fishes. D) The presence of non-respiratory air sacs increases the efficiency of respiration in birds. Show Answer Correct Answer: A) In insects, circulating body fluids serve to distribute oxygen to tissues. 36. RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by(a) RBCs(b) Plasma(c) Bicarbonates(d) All RBCs and bicarbonate carried 70 per cent of carbondixide. A) RBCs. B) Plasma. C) Bicarbonates. D) All RBCs and bicarbonate carried 70 per cent of carbondixide. Show Answer Correct Answer: C) Bicarbonates. 37. A spirometer cannot be used to measure- A) IRV. B) RV. C) IC. D) ERV. Show Answer Correct Answer: B) RV. 38. Which among the parts of an Earthworm acts as their respiratory membrane? A) Lungs. B) Spiracles. C) Gills. D) Skin. Show Answer Correct Answer: D) Skin. 39. Additional volume of air, a person can expire by a forcible expiration is known as Expiratory reserve volume . This averages 1000mL to 1100 mL A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. Cartilaginous rings in the respiratory passage are present in A) Trachea only. B) The trachea and initial part of the bronchi only. C) Trachea bronchi and initial part of bronchioles only. D) Trachea, bronchi, and all bronchioles. Show Answer Correct Answer: C) Trachea bronchi and initial part of bronchioles only. 41. At high altitude, the RBCs in the human blood will A) Increase in number. B) Decrease in number. C) Increase in size. D) Decrease in size. Show Answer Correct Answer: A) Increase in number. 42. CO2 is carried in blood by hemoglobin in the form of: A) Carbamino compound. B) Sodium bicarbonate. C) Potassium bicarbonate. D) Methaemoglobin. Show Answer Correct Answer: A) Carbamino compound. 43. Transport of oxygen take place by ..... A) RBC. B) WBC. C) Blood plasma. D) A and c. Show Answer Correct Answer: D) A and c. 44. The part starting with the external nostrils upto the terminal bronchiol.es constitute the- A) Respiratory or exchange part of respiratory system. B) Expiratory part. C) Conducting part. D) Inspiratory part. Show Answer Correct Answer: C) Conducting part. 45. Where is location of respiratory centre with two folds? A) Cerebrum. B) Brain stem. C) Cerebellum. D) Diencephalon. Show Answer Correct Answer: B) Brain stem. 46. After taking a long deep breath we do not respire for some seconds due to A) More CO2 in blood. B) More O2 in blood. C) Less CO2 in blood. D) Less O2 in blood. Show Answer Correct Answer: C) Less CO2 in blood. 47. The partial pressure of oxygen in the alveoli of the lungs ..... ? A) Equal to that in the blood. B) More than that in the blood. C) Less thsan that in the blood. D) Less than that of crbon dioxide. Show Answer Correct Answer: B) More than that in the blood. 48. The trachea leads to the ..... A) Esophagus. B) Bronchi. C) Pulmonary Vessel. D) Bronchioles. Show Answer Correct Answer: B) Bronchi. 49. What is the primary function of the conducting part of the respiratory system? A) Gas exchange. B) Production of sound. C) Regulation of breathing. D) Transport of air. Show Answer Correct Answer: D) Transport of air. 50. Left lung is ..... then the right lung A) Smaller. B) Larger. C) Equal. D) Broader. Show Answer Correct Answer: A) Smaller. 51. If a person exhales out forcefully by applying all his efforts, what will be the pulmonary volume inhaled by him immediately under normal condition without applying any extra effort? A) TV + ERV. B) TV + IRV + ERV. C) TV only. D) TV + IRV. Show Answer Correct Answer: A) TV + ERV. 52. What is the correct order for air entering the lungs? A) Trachea-Bronchi-Bronchioles-Alveoli. B) Trachea-Tracheoles-Bronchi. C) Trachea-Bronchioles-Bronchi-Alveoli. D) Alveoli-Bronchi-Bronchioles-Spiracles. Show Answer Correct Answer: A) Trachea-Bronchi-Bronchioles-Alveoli. 53. Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure is achieved when A) Intrapulmonary pressure is less than the atmospheric pressure. B) Intrapleural pressure become more than the intra-alveolar pressure. C) Intrapulmonary pressure is equal to the atmospheric pressure. D) Intrapulmonary pressure is greater than the atmospheric pressure. Show Answer Correct Answer: A) Intrapulmonary pressure is less than the atmospheric pressure. 54. What is symptoms of Emphysema? A) Inflammation of Alveoli. B) Hemorrhage of bronchioles. C) Increase in number of alveoli. D) Infection of microbacterium tubeculi. Show Answer Correct Answer: A) Inflammation of Alveoli. 55. Conduction part of the respiratory system is formed: A) From external nostrils upto the alveoli. B) From external nostrils up to the terminal bronchioles. C) From external nostrils up to the duct of alveoli. D) From external nostrils up to the alveoli. Show Answer Correct Answer: B) From external nostrils up to the terminal bronchioles. 56. After forceful inspiration, the amount of air that can be breathed out with maximum forced expiration is equal to A) IRV + RV + ERV. B) IRV +TV + ERV. C) TV + RV + ERV. D) IRV + ERV + TV + RV. Show Answer Correct Answer: B) IRV +TV + ERV. 57. What is the role of the diaphragm during inspiration? A) It relaxes. B) It contracts. C) It expands. D) It compresses. Show Answer Correct Answer: B) It contracts. 58. The movement by diffusion of oxygen and carbon dioxide across a membrane A) Ventilation. B) Respiration. C) Breathing. D) Gas exchange. Show Answer Correct Answer: D) Gas exchange. 59. During inspiration: A) Diaphragm contracts and EICM relaxes. B) Diaphragm relaxes and EICM contracts. C) Diaphragm contracts and EICM contracts. D) Both diaphragm and EICM relaxes. Show Answer Correct Answer: C) Diaphragm contracts and EICM contracts. 60. Cleans, moistens, and warms the air A) Windpipe. B) Trachea. C) Nasal passage. D) Larynx. Show Answer Correct Answer: C) Nasal passage. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 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 1 The Living World Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books