Breathing and Exchange of Gases NEET Questions

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Breathing and Exchange of Gases NEET Questions: Practice essential NEET questions on Breathing and Gas Exchange. Test your knowledge of vital concepts and prepare for NEET success!

Breathing, also referred to as respiration, is an essential process that involves inhaling oxygen and exhaling carbon dioxide. Air moves into and out of the lungs during this process. Gas exchange takes place in the alveoli, where oxygen enters the bloodstream, and carbon dioxide exits the bloodstream into the alveoli to be expelled. This mechanism ensures a steady oxygen supply for cellular activities and the removal of carbon dioxide, a metabolic waste product, from the body.

Here are some NEET-focused multiple-choice questions (MCQs) on the topic of Breathing and Gas Exchange to enhance your preparation:

Q1. In humans, breathing process starts from:

  1. The external nostril / external nares
  2. Nasal cavity
  3. Pharynx
  4. Trachea

Ans: a

Q2. The nasal chamber can be divided into how many different regions:

  1. 1
  2. 2
  3. 3
  4. 4

Ans: c

Q3. Nasal conchae are present in which region of the nasal cavity?

  1. Vestibule
  2. Respiratory region
  3. Olfactory region
  4. All of the above

Ans: b

Q4. In which nasal cavity region is inhaled air conditioned and humidified?

  1. Vestibule
  2. Respiratory region
  3. Olfactory region
  4. None of the above

Ans: b

Q5. Which of the following nasal cavity region is not directly associated with respiration?

  1. Vestibule
  2. Respiratory region
  3. Olfactory region
  4. Nasal conchae

Ans: c

Q6. Which of the following flow charts is correct for respiration?

  1. Nose — >nasal cavity — > nasopharynx — > oropharynx — > larynx — > trachea — > bronchi — > bronchioles — > terminal bronchioles — > respiratory bronchioles — > alveoli
  2. Nose — >nasal cavity — > nasopharynx — > oropharynx — > larynx — > trachea — > bronchioles — > bronchi — > terminal bronchioles — > respiratory bronchioles — > alveoli
  3. Nose — >nasal cavity — > oropharynx — > nasopharynx — > larynx — > trachea — > bronchi — > bronchioles — > terminal bronchioles — > respiratory bronchioles — > alveoli
  4. Nose — >nasal cavity — > nasopharynx — > oropharynx — > larynx — > trachea — > bronchi — > bronchioles — > respiratory bronchioles — > terminal bronchioles — > alveoli

Ans: a

Q7. The larynx or voice box is made up of:

  1. Bones
  2. Cartilages
  3. Ligaments
  4. Tendons

Ans: b

Q8. Which of the following are the functions of larynx?

  1. Provides smooth passage of air from the nasal cavity to the lungs
  2. Plays a vital role in channeling swallowed food into the esophagus
  3. Functions in speech production
  4. All of the above

Ans: d

Q9. Which of the following is unpaired cartilage of the larynx?

  1. Thyroid
  2. Arytenoid
  3. Corniculate
  4. Cuneiform

Ans: a

Q10. Which of the following is a paired cartilage of the larynx?

  1. Thyroid cartilage
  2. Cricoid cartilage
  3. Epiglottis
  4. Arytenoid cartilage

Ans: d

Q11. Adam’s apple is the laryngeal prominence of:

  1. Thyroid cartilage
  2. Cricoid cartilage
  3. Arytenoid cartilage
  4. Corniculate cartilage

Ans: a

Q12. Which of the cartilages of the larynx is largest in size?

  1. Cricoid cartilage
  2. Thyroid cartilage
  3. Arytenoid cartilage
  4. Epiglottis

Ans: b

Q13. The hyoid bone is located at:

  1. The base of the tongue also called as tongue bone
  2. the apex of the trachea below the larynx
  3. the base of trachea
  4. none of the above

Ans: a

Q14. during normal quiet inspiration how many muscles are used to increase the thoracic cavity?

  1. 1
  2. 2
  3. 3
  4. 4

Ans: b

Explanation:

Only two muscles are involved during normal breathing. And these include diaphragm muscles and external intercostals. The normal breathing is also called as abdominal breathing because the diaphragm muscles are prominently involved and thus the abdominal movement can be seen.

Q15. During forced inspiration, which of the following muscles are involved?

  1. Diaphragm muscles
  2. External intercostals
  3. Sternocleidomastoid muscles
  4. Anterior serratus
  5. Sealine
  6. All of the above

Ans: f

Explanation:

In forced breathing, thoracic movement can be seen and thus it is also called as thoracic breathing. This kind of breathing is also seen in pregnant women since due to increase in the size of the uterus, the diaphragm muscles movement is restricted and thus only thoracic breathing would take place.

 

 

 

 

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