Respiratory System MCQ Multiple Choice Questions Answers | Quiz for Practice

Q: 1. The term respiration refers to

Correct Answer is: all of the above.

Q: 2. A structure that is not a part of the respiratory system is

Correct Answer is: the esophagus.

Q: 3. The functions of the respiratory system include all of the following except

Correct Answer is: creating air pressure that allows for swallowing.

Q: 5. The roof of the nasal cavity is formed medially by

Correct Answer is: the cribriform plate of the ethmoid bone.

Q: 6. Mucus is secreted into the nasal cavity by

Correct Answer is: the goblet cells.

Q: 8. A child who is a persistent mouth-breather because of blocked air passage in the nasopharynx probably has

Correct Answer is: pharyngeal tonsils.

Q: 9. Adams apple is used to refer to

Correct Answer is: the thyroid cartilage.

Q: 10. The vocal folds are attached to

Correct Answer is: the arytenoid and thyroid cartilages.

Q: 11. Which of the following does (do) not apply to the trachea or bronchi?

Correct Answer is: simple squamous epithelium

Q: 12. Which of the following is the correct sequence in which inspired air flows?

Correct Answer is: nasal fossa, choana, pharynx, larynx, trachea, bronchus, and lung

Welcome to our Respiratory System MCQs category page! These multiple-choice questions are designed to help students and exam aspirants test and enhance their knowledge of the respiratory system.

About Respiratory System MCQ Questions

The Respiratory System MCQs cover a wide range of topics, from the basic structure and function of the lungs to more complex processes like gas exchange and respiratory disorders. Each question is crafted to ensure a comprehensive understanding and application of key concepts in respiratory physiology.

Why Practice Respiratory System Objective Questions?

Practicing these objective questions can significantly boost your performance in school and college exams, competitive exams, and job interviews. They help reinforce your knowledge, improve your problem-solving skills, and build confidence in your understanding of the respiratory system.

Who Should Use These MCQs?

Students preparing for school or college exams
Competitive exam aspirants
Candidates preparing for interviews

Respiratory System MCQ Questions for Practice

1. The term respiration refers to

ventilation (breathing).
gas exchange within the lungs.
O2 utilization within the cells.
all of the above.

2. A structure that is not a part of the respiratory system is

the nasal cavity.
the pharynx.
the trachea.
the esophagus.

3. The functions of the respiratory system include all of the following except

providing O2 to the bloodstream and removing CO2.
creating air pressure that allows for swallowing.
enabling vocalization as expired air passes over the vocal cords.
assisting in abdominal compression.

4. Which of the following is (are) not located within the nasal cavity?

conchae
meatuses
uvula
nasal septum

5. The roof of the nasal cavity is formed medially by

the superior concha.
the nasal bone.
the sphenoid bone.
the cribriform plate of the ethmoid bone.

6. Mucus is secreted into the nasal cavity by

the goblet cells.
the vestibule.
the adenoids.
the choanae.

7. Which of the following does not refer to a paranasal sinus?

maxillary
pterygoidal
sphenoidal
frontal

8. A child who is a persistent mouth-breather because of blocked air passage in the nasopharynx probably has

palatine tonsils.
nasal meatuses.
paranasal sinuses.
pharyngeal tonsils.

9. Adams apple is used to refer to

the trachea.
the thyroid cartilage.
the larynx.
the epiglottis.

10. The vocal folds are attached to

the cricoid and thyroid cartilages.
the cuneiform and cricoid cartilages.
the corniculate and thyroid cartilages.
the arytenoid and thyroid cartilages.

11. Which of the following does (do) not apply to the trachea or bronchi?

goblet cells
carina
cilia
simple squamous epithelium

12. Which of the following is the correct sequence in which inspired air flows?

choana, pharynx, nasal fossa, larynx, trachea, bronchus, and lung
nasal fossa, pharynx, larynx, choana, trachea, bronchus, and lung
nasal fossa, choana, pharynx, larynx, trachea, bronchus, and lung
choana, nasal fossa, larynx, pharynx, trachea, bronchus, and lung

13. On its way to the pulmonary alveoli, inspired air comes in contact with various kinds of epithelia in the sequence

simple squamous, stratified squamous, simple cuboidal, and pseudostratified ciliated columnar epithelia.
pseudostratified ciliated columnar, stratified squamous, simple cuboidal, and simple squamous epithelia.
stratified squamous, pseudostratified ciliated columnar, simple cuboidal, and simple squamous epithelia.
pseudostratified ciliated columnar, stratified squamous, simple squamous, and simple cuboidal epithelia.

14. The functional units of the respiratory system, where gas exchange occurs are

the pulmonary alveoli.
the pleurae.
the lungs.
the pulmonary vessels.

15. Which of the following statements is false concerning the pulmonary alveoli?

They are lined with ciliated epithelium.
They are moistened with surfactant.
They number about 350 million per lung.
They permit diffusion of respiratory gases.

16. The region where a bronchus and pulmonary vessel enter and exit the lung is

the capsule.
the base.
the hilum.
the apex.

17. Which of the following statements is false concerning the structure of the left lung?

It is subdivided into a superior lobe and an inferior lobe.
It contains a cardiac notch.
It contains 10 bronchial segments.
Its apex extends above the level of the clavicle.

18. Of the following serous membranes, the one that lines the thoracic walls and the thoracic surface of the diaphragm is

the parietal pleura.
the pleural peritoneum.
the mediastinal pleura.
the visceral pleura.

19. The pleurae perform all of the following functions except that of

separating the thoracic viscera.
secreting serous fluid.
forming an effective pressure chamber.
facilitating the diffusion of respiratory gases.

20. The principal muscles responsible for the inspiration phase of pulmonary ventilation are

the diaphragm and internal intercostal muscles.
the scalenes and internal intercostal muscles.
the internal and external intercostal muscles.
the diaphragm, external intercostal muscles, and internal intercostal muscles (interchondral part).

21. When the external intercostal muscles contract, the thoracic volume increases

vertically.
anteroposteriorly.
inferiorly.
superiorly.

22. Which of the following muscles does (do) not contract during extreme forced expiration—as in coughing?

the internal intercostals
the transverse abdominis
the diaphragm
the internal abdominal oblique

23. Air that is moved in and out of the lungs during normal quiet breathing is called

tidal volume.
vital capacity.
residual volume.
inspiratory reserve volume.

24. When a person takes a very deep breath of air just prior to diving into water, this volume of air is referred to as

the tidal volume.
the vital capacity.
the residual volume.
the inspiratory reserve volume.

25. When the “wind” is knocked out of a football player because of a hard blow to the thorax or abdomen, the airthat is actually forced out of his lungs is

the tidal volume.
the vital capacity.
the residual volume.
the inspiratory reserve volume.

26. The principal respiratory center that directly controls breathing is located in

the cerebrum.
the hypothalamus.
the lung.
the medulla oblongata.

27. The diaphragm is innervated by

the inspiratory nerves.
the phrenic nerves.
the vagus nerves.
the intercostal nerves.

28. Which of the following does (do) not contain respiratory chemoreceptors?

aortic arch
carotid arteries
lungs
medulla oblongata

29. The two cranial nerves that transmit sensory information to the brain from the peripheral, respiratory chemoreceptors are

the facial and vagus nerves.
the facial and glossopharyngeal nerves.
the glossopharyngeal and hypoglossal nerves.
the glossopharyngeal and vagus nerves.

30. During embryonic development, the olfactory placode becomes

the nasal cavity.
the larynx.
the trachea.
the lung.