This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Biology Chapter 17 Breathing And Exchange Of Gases – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Biology Chapter 17 Breathing And Exchange Of Gases Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the primary gas exhaled by humans during respiration? A) Nitrogen. B) Carbon Dioxide. C) Hydrogen. D) Oxygen. Show Answer Correct Answer: B) Carbon Dioxide. 2. Which organ is NOT part of the human respiratory system? A) Lungs. B) Trachea. C) Heart. D) Bronchi. Show Answer Correct Answer: C) Heart. 3. What amount of carbon dioxide is delivered by every 100 ml of deoxygenated blood t the alveoli ..... ? A) 4 ml. B) 5ml. C) 15 ml. D) 20 ml. Show Answer Correct Answer: A) 4 ml. 4. During expiration, the diaphragm becomes A) Normal. B) Flattened. C) Dome-shaped. D) Oblique. Show Answer Correct Answer: C) Dome-shaped. 5. Which of the following is true about formation of oxyhemoglobin? A) It forms when pO$_{2}$ is low and dissociates when pCO$_{2}$ is low. B) It forms when pO$_{2}$ is low and dissociates when pCO$_{2}$ is high. C) It forms when pO$_{2}$ is high and dissociates when pCO$_{2}$ is high. D) It forms when pO$_{2}$ is high and dissociates when pCO$_{2}$ is low. Show Answer Correct Answer: C) It forms when pO$_{2}$ is high and dissociates when pCO$_{2}$ is high. 6. RESPIRATION IN FISH IS CALLED A) PULMONARY RESPIRATION. B) AQUATIC RESPIRATION. C) BRANCHIAL RESPIRATION. D) CUTANEOUS RESPIRATION. Show Answer Correct Answer: C) BRANCHIAL RESPIRATION. 7. Which of the following best describes the respiring tissues? A) PO$_{2}$ is high and pCO$_{2}$ is high. B) PO$_{2}$ is high and pCO$_{2}$ is low. C) PO$_{2}$ is low and pCO$_{2}$ is low. D) PO$_{2}$ is low and pCO$_{2}$ is high. Show Answer Correct Answer: D) PO$_{2}$ is low and pCO$_{2}$ is high. 8. What's the job of the diaphragm? A) To support the ribs. B) To clear the lungs of toxins. C) To give hiccups. D) To control breathing. Show Answer Correct Answer: D) To control breathing. 9. Assertion:If there is no air in trachea, it will not collapse.Reason:Trachea is having the cartilagenous ring. A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C) If Assertion is true but Reason is false. D) If both Assertion and Reason are false. Show Answer Correct Answer: A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. 10. Which structure of man is similar to spiracle of cockroach? A) Nostril. B) Bronchiole. C) Lung. D) Alveolus. Show Answer Correct Answer: A) Nostril. 11. Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of: A) Inspiratory Reserve Volume. B) Tidal Volume. C) Expiratory Reserve Volume. D) Residual Volume. Show Answer Correct Answer: D) Residual Volume. 12. Newt has two organ breathing which are ..... and ..... A) Lungs and gills. B) Spiracle and moist skin. C) Lungs and moist skin. D) Lungs and spiracle. Show Answer Correct Answer: C) Lungs and moist skin. 13. Which gas is primarily inhaled by humans during respiration? A) Oxygen. B) Helium. C) Carbon Dioxide. D) Nitrogen. Show Answer Correct Answer: A) Oxygen. 14. Hemoglobin that is bonded to carbon monoxide and therefore cannot transport oxygen, is called ..... ? A) Carboxyhemoglobin. B) Metemoglobin. C) Reduced hemoglobin. D) Carbamino hemoglobin. Show Answer Correct Answer: A) Carboxyhemoglobin. 15. Most common mode of respiration in frog: A) Cutaneous respiration. B) Buccopharyengeal respiration. C) Pulmonary respiration. D) Branchial respiration. Show Answer Correct Answer: B) Buccopharyengeal respiration. 16. Which of the following parts are involved in the mechanism of breathing? A) Abdominal muscles. B) Diaphragm. C) Intercostal muscles. D) All of these. Show Answer Correct Answer: D) All of these. 17. CO2 in the blood lowers the pH because CO2 combines with ..... , and the reaction rate increases ..... A) H2O only forms H+ ions, carbon. B) H+ to form HCO3-, oxyhemoglobin. C) H2O to form H+ and HCO3-, carbonic anhydrase. D) H2O forms only HCO3-, carbonic anhydrase. Show Answer Correct Answer: C) H2O to form H+ and HCO3-, carbonic anhydrase. 18. The respiratory centre in the brain is stimulated by A) CO2 concentration in venous blood. B) CO2 concentration in arterial blood. C) O2 concentration in arterial blood. D) O2 concentration in venous blood. Show Answer Correct Answer: B) CO2 concentration in arterial blood. 19. Why do human beings have difficulty breathing at high elevations? A) O$_{2}$ makes up lower percentage of air there. B) The temperature is lower there. C) The barometric pressure is higher there. D) PO$_{2}$ is lower there. Show Answer Correct Answer: D) PO$_{2}$ is lower there. 20. Amphibia does not respire using A) Skin. B) Lungs. C) Gills. D) None. Show Answer Correct Answer: D) None. 21. 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) 1, 450 mL. B) 4, 450 mL. C) 5, 000 mL. D) 5, 450 mL. Show Answer Correct Answer: C) 5, 000 mL. 22. Some organisms exchange gases through the sides of their body through tiny holes called ..... A) Spiracles. B) Diffusion. C) Lungs. D) Oxygen. Show Answer Correct Answer: A) Spiracles. 23. 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. 24. Which of the following has the smallest diameter? A) Trachea. B) Terminal bronchiole. C) Tertiary bronchus. D) Secondary bronchus. Show Answer Correct Answer: B) Terminal bronchiole. 25. Respiratory center of brain is stimulated by- A) Co2 content in venous blood. B) Co2 content in arterial blood. C) O2 content in arterial blood. D) O2 content in venous blood. Show Answer Correct Answer: B) Co2 content in arterial blood. ← 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 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books