This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Biology > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A person with a tidal volume of 450 mL, a vital capacity of 4, 000 mL, and a residual volume of 1, 000 mL would have a potential total lung capacity of A) 5, 000 mL. B) 5, 450 mL. C) 1, 450 mL. D) 4, 450 mL. Show Answer Correct Answer: A) 5, 000 mL. 2. Some organisms exchange gases through the sides of their body through tiny holes called ..... A) Oxygen. B) Lungs. C) Diffusion. D) Spiracles. Show Answer Correct Answer: D) Spiracles. 3. Which of the following options is wrong 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. Show Answer Correct Answer: A) It is a bony box. 4. Which of the following has the smallest diameter? A) Tertiary bronchus. B) Terminal bronchiole. C) Trachea. D) Secondary bronchus. Show Answer Correct Answer: B) Terminal bronchiole. 5. Respiratory center of brain is stimulated by- A) Co2 content in venous blood. B) Co2 content in arterial blood. C) O2 content in venous blood. D) O2 content in arterial blood. Show Answer Correct Answer: B) Co2 content in arterial blood. 6. Which of the following has no specialized respiratory structure: A) Crab. B) Ant. C) Salmon. D) Ascaris. Show Answer Correct Answer: D) Ascaris. 7. Partial pressure of oxygen in atmospheric air is ..... mm HG and in tissues it is ..... mm HG A) 0.3, 40. B) 159, 40. C) 40, 159. D) 0.3, 45. Show Answer Correct Answer: B) 159, 40. 8. What is the primary site of gas exchange in the lungs? A) Alveoli. B) Bronchi. C) Larynx. D) Trachea. Show Answer Correct Answer: A) Alveoli. 9. Gas exchange is needed to supply ..... to cells and remove ..... A) Carbon dioxide; water. B) Oxygen; carbon dioxide. C) Oxygen; food. D) Carbon dioxide; oxygen. Show Answer Correct Answer: B) Oxygen; carbon dioxide. 10. How much O2 is transported in the form of kHbo2? A) 3%. B) 97%. C) 70%. D) 100%. Show Answer Correct Answer: B) 97%. 11. Which of the following situations would result in the greatest degree of O$_{2}$ saturation for haemoglobin, assuming PO$_{2}$ remains constant- A) Decreased CO$_{2}$ levels, decreased temperature. B) Increased CO$_{2}$ levels, increased temperature. C) Decreased CO$_{2}$ levels, increased temperature. D) Increased CO$_{2}$ levels, decreased temperature. Show Answer Correct Answer: A) Decreased CO$_{2}$ levels, decreased temperature. 12. The process of migration of chloride ions from plasma to RBC and of carbonate ions from RBC to plasma is A) Na+ pump. B) Ionic shift. C) Atomic shift. D) Chloride shift. Show Answer Correct Answer: D) Chloride shift. 13. The diaphragm relaxes. A) Inhalation. B) Exhalation. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exhalation. 14. The most common cause of emphysema is? A) Allergies. B) Cigarette smoking. C) Prolonged steroid use. D) Anxiety. Show Answer Correct Answer: B) Cigarette smoking. 15. Bohr Shift describes A) The outward movement of Chloride ions from the blood cell inexchange for bicarbonate ions moving into the cell. B) The rightward shift of the entire oxygen equilibrium curve when pH rises. C) The rightward shift of the entire oxygen equilibrium curve when pH falls. D) The leftward shift of the entire oxygen equilibrium curve when temperature rises. Show Answer Correct Answer: C) The rightward shift of the entire oxygen equilibrium curve when pH falls. 16. The inspiratory capacity includes A) Expirtory reserve volume+ residual volume. B) Inspiratory reserve volume + expiratory reserve volume. C) Tidal volume +expiratory reserve volume. D) Tidal volume + inspiratory reserve volume. Show Answer Correct Answer: D) Tidal volume + inspiratory reserve volume. 17. The branching network of ..... comprise the lungs. A) Bronchi. B) Bronchioles. C) Alveoli. D) All. Show Answer Correct Answer: D) All. 18. Dissociation of oxyhaemoglobin can be promoted by A) Low body temperature. B) High blood pH. C) High pCO2. D) Low pCO2. Show Answer Correct Answer: C) High pCO2. 19. Alveolus loses elasticity and alvelous filled with liquid are symptoms of which disease? A) Emphysema-asthama. B) Emphysema-pneumonia. C) Emphysema-bronchitis. D) Pneumonia-emphysema. Show Answer Correct Answer: B) Emphysema-pneumonia. 20. Why grasshopper can stay alive after it head is put into water? A) Because it has power. B) Because it can breathe through lungs. C) Because spiracle is located at the abdomen. D) Because it can breathe through moist skin. Show Answer Correct Answer: C) Because spiracle is located at the abdomen. 21. Human skin cannot function as a respiratory organ because A) The skin is not connected to the lungs. B) The skin does not have the necessary respiratory structures. C) The skin is not exposed to air. D) The skin does not have blood vessels for gas exchange. Show Answer Correct Answer: B) The skin does not have the necessary respiratory structures. 22. Identify the pathway of air. A) Mouth, nasal cavity, bronchi, bronchioles, alveoli. B) Nasal cavity/mouth, trachea, bronchi, bronchioles, alveoli. C) Nasal cavity/mouth, trachea, bronchi, bronchus, alveoli. D) Nasal cavity, throat, bronchioles, bronchi, alveoli. Show Answer Correct Answer: B) Nasal cavity/mouth, trachea, bronchi, bronchioles, alveoli. 23. Which situation is observed when diaphragm contracts? A) Size of thoracic cavity increases, partial pressure of air increases in lungs. B) Size of thoracic cavity increases, partial pressure of air decreases in lungs. C) Size of thoracic cavity decreases, partial pressure of air decrease in lungs. D) Decrease size of thorax cavity, partial pressure of air increases in lungs. Show Answer Correct Answer: B) Size of thoracic cavity increases, partial pressure of air decreases in lungs. 24. The diaphragm contracts. A) Inhalation. B) Exhalation. C) All the above. D) None of the above. Show Answer Correct Answer: A) Inhalation. 25. Which of the following are features of the alveoli that adapt them to gas exchange?I. High surface areaII. Thin wallsIII. Dry surfaces A) I and II only. B) I only. C) II and III. D) I, II, and III. Show Answer Correct Answer: A) I and II only. 26. Pneumotaxic centre is present in- A) Pons. B) Medulla oblongata. C) Cerebellum. D) Cerebrum. Show Answer Correct Answer: A) Pons. 27. Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL, respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL? A) 2200 mL. B) 1700 mL. C) 1500 mL. D) 2700 mL. Show Answer Correct Answer: C) 1500 mL. 28. During rest, the metabolic needs of the body are at their minimum. Which of the following is indicative of this situation? A) Rate of breathing. B) O2 intake and CO2 output. C) Pulse rate. D) All of these. Show Answer Correct Answer: D) All of these. 29. How many statements are not true-(1) Any gas travels from its higher partial pressure to its lower partial pressure.(2) Pressure is directly proportional to Volume.(3) External intercostal muscles are involved in forceful expiration(d) Any increase in thoracic cavity will results into increase of Pulmonary cavity. A) 2 statements are correct. B) 3 statements are correct. C) 1 statement is correct. D) All are incorrect. Show Answer Correct Answer: A) 2 statements are correct. 30. Statement I-Oxygen is utilised by the organisms to directly break down of glucose.Statement II-Breathing is commonly called as Respiration. A) Both statement are true. B) Both statement are false. C) I is true but II is false. D) II is true but I is false. Show Answer Correct Answer: D) II is true but I is false. 31. Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs: ..... A) By binding to R.B.C. B) As bicarbonate ions. C) In the form of dissolved gas molecule. D) As carb amino-haemoglobin. Show Answer Correct Answer: B) As bicarbonate ions. 32. Total volume of air a person can expire after a normal inspiration? A) TV + IRV. B) TV + ERV. C) TV + IRV + ERV. D) Only TV. Show Answer Correct Answer: B) TV + ERV. 33. Identify the correct statement with reference to transport of respiratory gases by blood. A) Haemoglobin is necessary for transport of carbon dioxide and carbonic anhydrase for transport of oxygen. B) Haemoglobin is necessary for transport of oxygen and carbonic anhydrase for transport of carbon dioxide. C) Only oxygen is transported by blood. D) Only carbon dioxide is transported by blood. Show Answer Correct Answer: B) Haemoglobin is necessary for transport of oxygen and carbonic anhydrase for transport of carbon dioxide. 34. Epithelium present in the trachea is: A) Ciliated cuboidal epithelium. B) Pseudostratified ciliated coloumnar glandular epithelium. C) Pseudostratified epithelium. D) Ciliated coloumnar epithelium. Show Answer Correct Answer: B) Pseudostratified ciliated coloumnar glandular epithelium. 35. Type 1 pneumocytes are made up of: A) Simple squamous epithelium. B) Cuboidal epithelium. C) Yellow fibrous connective tissue. D) Lecithin. Show Answer Correct Answer: A) Simple squamous epithelium. 36. Bulk of oxygen diffuses from the plasma into the red blood corpuscles where it joins loosely with Fe2+ ions of haemoglobin (Hb) to form bright red oxyhaemoglobin (HbO2). This process is called A) Dehydrogenation. B) Oxidation. C) Oxygenation. D) Hydration. Show Answer Correct Answer: C) Oxygenation. 37. Which one of the following can bind several hundred times more strongly to the haemoglobin than oxygen? A) H2 CO3. B) CO2. C) CO. D) None of these. Show Answer Correct Answer: C) CO. 38. In lungs, the air is separated from the venous blood through A) Transitional epithelium+ tunica external of blood vessel. B) Squamous epithelium + endothelium of blood vessel. C) Squamous epithelium + tunica media of blood vessel. D) None of these. Show Answer Correct Answer: B) Squamous epithelium + endothelium of blood vessel. 39. Cartilagenous tissues in the structure A) Trachea. B) Bronchus. C) Primary bronchiole. D) A and c both. Show Answer Correct Answer: D) A and c both. 40. Neural control of breathing is in the A) Diaphragm. B) Olfactory lobe. C) Medulla. D) Cerebrum. Show Answer Correct Answer: C) Medulla. 41. Mammalian lungs are A) Hollow. B) Solid & spongy. C) Spongy. D) None. Show Answer Correct Answer: B) Solid & spongy. 42. Vol of the air that will remain in the lungs after normal expiration ..... ? A) 2300ml. B) 1200 ml. C) 4600ml. D) 5800ml. Show Answer Correct Answer: A) 2300ml. 43. ERV+RV represents A) IC. B) FRC. C) TLC. D) EC. Show Answer Correct Answer: B) FRC. 44. Besides PO2 the other factor(s) affecting the binding of O2 with haemoglobin is / are- A) PCO$_{2}$. B) H$^{ +}$ conc. C) Temperature. D) All. Show Answer Correct Answer: D) All. 45. A flap of tissue that closes when we eat so food doesn't not go down the trachea A) Larynx. B) Trachea. C) Epiglottis. D) Pharynx. Show Answer Correct Answer: C) Epiglottis. 46. The amount of O2 delivered by 100 ml blood to the tissue under normal physiological condition:(1) (2)(3) (4) A) 20 ml. B) 200 ml. C) 5 ml. D) 1.34 ml. Show Answer Correct Answer: C) 5 ml. 47. Which of the following is true for CO2 concentration? A) More in expired air than in alveolar air. B) More in inspired air than in expired air. C) More in alveolar air than in expired air. D) More in inspired air than in alveolar air. Show Answer Correct Answer: C) More in alveolar air than in expired air. 48. The factor which does not affect the rate of alveolar diffusion is A) Thickness of membrane. B) Reactivity of gases. C) Solubility of gases. D) Pressure gradient. Show Answer Correct Answer: B) Reactivity of gases. 49. During swollowing ..... is covered by thin cartilagenous flap called ..... A) Trachea, epiglottis. B) Oesophagus, gullet. C) Glottis, epiglottis. D) Larynx, epiglottis. Show Answer Correct Answer: C) Glottis, epiglottis. 50. The muscular organ that holds the vocal chords is the ..... A) Trachea. B) Larynx. C) Pharynx. D) Epiglottis. Show Answer Correct Answer: B) Larynx. 51. Pulmonary ventilation is: A) Breathing. B) Exchange of CO2 & O2 between lungs and atmosphere. C) Physical process. D) All. Show Answer Correct Answer: D) All. 52. How long can humans survive without oxygen? A) 30 seconds. B) 4-6 minutes. C) 1-2 minutes. D) 9-10 minutes. Show Answer Correct Answer: B) 4-6 minutes. 53. What is the length of trachea in humans? A) 10-11cms. B) 10-11inches. C) 10inched. D) 10cm. Show Answer Correct Answer: A) 10-11cms. 54. What is the function of the bronchi in the respiratory system? A) To filter air. B) To facilitate gas exchange. C) To transport air to the lungs. D) To produce sound. Show Answer Correct Answer: C) To transport air to the lungs. 55. The greatest quantity of air that can be expired after a maximum inspiratory effort is its ..... A) Vital capacity. B) Residual volume. C) Lung volume. D) Tidal volume. Show Answer Correct Answer: A) Vital capacity. 56. The oxygen haemoglobin dissociation curve will show a right shift in case of A) Less H + concentration. B) High pCO2. C) High pO2. D) Low pCO2. Show Answer Correct Answer: B) High pCO2. 57. 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) D. B) B. C) C. D) A. Show Answer Correct Answer: D) A. 58. Carbon dioxide reacts with water in RBC to form carbonic acid .what is responsible for it? A) Oxido reductase. B) Hydrolyse. C) Carboxypeptidase. D) Carbonic anhydrase. Show Answer Correct Answer: D) Carbonic anhydrase. 59. 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. 60. How is CO2 carried by haemoglobin? A) As methaemoglobin. B) As oxy-haemoglobin. C) As deoxy-haemoglobin. D) As carbamino-haemoglobin. Show Answer Correct Answer: D) As carbamino-haemoglobin. ← 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 3Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 4Class 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