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Breathing and Exchange of Gases MCQ: Preparing for the CBSE Class 11 Biology Board Exam 2024 includes practicing MCQs from Chapter 14, “Breathing and Exchange of Gases.” These questions assess understanding with clear right or wrong answers. They cover respiratory organs, breathing mechanisms, gas exchange in tissues, and regulatory processes in respiration. Practicing these MCQs helps students to enhance the concept and perform well in the exam’s initial section, boosting confidence and understanding of respiratory biology.
Breathing and Exchange of Gases MCQ
Breathing and Gas Exchange MCQ for Class 11 is a valuable tool for students preparing for the NEET exam, which is crucial for medical studies. This topic focuses on the mechanics of breathing and the process of gas exchange, essential concepts in understanding human physiology.
The MCQ on Breathing and Exchange of Gases covers various aspects such as the functioning of the lungs, the physiology of respiration, and the mechanisms involved in gas exchange. By practicing these questions, students can solidify their knowledge and enhance their preparation for the biology section of the NEET exam as well as for class 11 exams.
Also Check: NEET Biology MCQs
Breathing and Exchange of Gases MCQ with Answers
Question 1: What is the partial pressure of oxygen in the pulmonary vein?
a) 40 mmHg
b) 60 mmHg
c) 100 mmHg
d) 120 mmHg
Answer: c) 100 mmHg
Question 2: The chemoreceptive area in the medulla oblongata is primarily sensitive to which substances and plays a significant role in regulating what?
a) Oxygen, heart rate
b) CO₂ and hydrogen ions, respiratory rate
c) Nitrogen, blood pressure
d) Calcium, digestive enzymes
Answer: b) CO₂ and hydrogen ions, respiratory rate
Question 3: What triggers the onset of inspiration in humans?
a) Contraction of intercostal muscles
b) Relaxation of the diaphragm
c) Contraction of the diaphragm
d) Expansion of the lungs
Answer: c) Contraction of the diaphragm
Question 4: Which structure is supported by incomplete cartilaginous rings?
a) Bronchioles
b) Trachea
c) Alveoli
d) Larynx
Answer: b) Trachea
Question 5: The thoracic cavity is bounded ventrally by which structure?
a) Vertebral column
b) Sternum
c) Diaphragm
d) Rib cage
Answer: b) Sternum
Question 6: What is the name of the sound-producing organ in humans?
a) Pharynx
b) Larynx
c) Trachea
d) Epiglottis
Answer: b) Larynx
Question 7: Which of the following processes occurs during exhalation?
a) Contraction of the diaphragm
b) Expansion of the chest cavity
c) Decrease in thoracic volume
d) Increase in lung volume
Answer: c) Decrease in thoracic volume
Question 8: Which organ is part of both the digestive and respiratory systems?
a) Trachea
b) Esophagus
c) Pharynx
d) Stomach
Answer: c) Pharynx
Question 9: What is the chronic respiratory disorder primarily caused by smoking?
a) Asthma
b) Bronchitis
c) Emphysema
d) Tuberculosis
Answer: c) Emphysema
Question 10: Which statement is true about fetal hemoglobin (HbF)?
a) It has a lower affinity for oxygen than adult hemoglobin.
b) It is present only after birth.
c) It possesses a greater affinity for oxygen compared to adult hemoglobin.
d) It binds more CO₂ than adult hemoglobin.
Answer: c) It has a higher affinity for oxygen than adult hemoglobin.
Question 11: Which gas mainly prompts the human respiratory system to accelerate the breathing rate?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer: B) Carbon dioxide
Question 12: What best describes the Hamburger phenomenon?
a) Exchange of oxygen and carbon dioxide in the lungs
b) Chloride shift in red blood cells
c) Synthesis of hemoglobin
d) Formation of carbonic acid
Answer: b) Chloride shift in red blood cells
Question 13: What is the term for the volume of air remaining in the lungs after a normal expiration?
a) Residual volume
b) Expiratory reserve volume
c) Functional residual capacity
d) Total lung capacity
Answer: c) Functional residual capacity
Question 14: How is most of the carbon dioxide produced by body cells transported to the lungs?
a) Dissolved in plasma
b) Bound to hemoglobin
c) As bicarbonate ions
d) As carbamino compounds
Answer: c) As bicarbonate ions
Question 15: Which of the following substances is at least partly transported dissolved in blood plasma?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Both a and b
Answer: d) Both a and b
Question 16: Select the correct match from the following options.
a) Tidal volume – 2500 – 3000 mL
b) Inspiratory reserve volume – 1100 – 1200 mL
c) Expiratory reserve volume – 500 – 550 mL
d) Residual volume – 1000 – 1100 mL
Answer: d) Residual volume – 1000 – 1100 mL
Question 17: Which of the following statements is incorrect?
a) The diaphragm contracts during inhalation.
b) Oxygen binds to the heme group in hemoglobin.
c) The trachea is part of the lower respiratory system.
d) Most oxygen is transported dissolved in plasma.
Answer: d) Most oxygen is transported dissolved in plasma.
Question 18: Identify the incorrect match from the following pairs.
a) Tidal volume – 500 mL
b) Inspiratory reserve volume – 1900 mL
c) Expiratory reserve volume – 700 mL
d) Vital capacity – 1100 mL
Answer: d) Vital capacity – 1100 mL
More Resources for Class 11
- NCERT Solutions for Class 11 Chemistry
- NCERT Solutions for Class 11 Physics
- NCERT Solutions for Class 11 Biology
- NCERT Solutions for Class 11 Maths
Question 19: Which respiratory feature involves a double-layered membrane with fluid in between to reduce friction?
a) Pleura
b) Alveoli
c) Bronchioles
d) Diaphragm
Answer: a) Pleura
Question 20: Match the Column I with Column II and select the correct option.
Match the items in Column I with those in Column II and select the correct option.
| Column-I | Column-II |
| a. Tidal volume | iii. 500 mL |
| b. Inspiratory reserve volume | i. 2500 – 3000 mL |
| c. Expiratory reserve volume | iv. 1000 – 1100 mL |
| d. Residual volume | ii. 1100 – 1200 mL |
- i iv ii iii
- iii ii i iv
- iii i iv ii
- iv iii ii i
Answer: 3. iii i iv ii
