Human Respiratory System

Q.

What is the pathway taken by air in the respiratory system?

Q. Which of the following is a correct sequence of movement of air during inspiration?

1. nose $\to$ nasal cavity $\to$ pharynx $\to$ trachea $\to$larynx $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries
2. nasal cavity $\to$nose $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries
3. nose $\to$ nasal cavity $\to$ larynx $\to$pharynx $\to$ trachea $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries
4. nose $\to$ nasal cavity $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries

Q. Which structure of the lungs is directly involved in $\frac{O_2}{C{O}_2}$ exchange between air and blood capillary?

1. Bronchi
2. Trachea
3. Secondary bronchi
4. Alveoli

Q. Which of the following is correct regarding lecithin?

1. It lowers surface tension in alveoli
2. It can be produced by pneumocyte-II
3. It is a phospholipid that prevents the collapsing of alveoli
4. All of the above

Q. Arrange the following parts of the air passage from upper to lower respiratory tract.

1. Trachea
2. Pharynx
3. Larynx
4. Bronchi

Q.

Aerobic respiratory pathway is also termed as ___ pathway.

1. anabolic

2. catabolic

3. creatine phosphate

4. amphibolic

Q. The lungs are bound anteriorly by the and posteriorly by the .

1. liver
2. spine
3. sternum
4. heart

Q.

Identify the parts labelled 1-8 in the diagram given below.

1. 1. Nasal cavity, 2. Pharynx, 3. Trachea, 4. Lungs, 5. Bronchi, 6. Bronchioles, 7. Alveoli, 8. Diaphragm

2. 1. Nasal cavity, 2. Pharynx, 3. Lungs, 4. Bronchi, 5. Bronchioles, 6. Diaphragm, 7. Alveoli, 8. Trachea

3. 1. Nasal cavity, 2. Trachea, 3. Pharynx, 4. Lungs, 5. Bronchioles, 6. Bronchi, 7. Alveoli, 8. Diaphragm

4. 1. Nasal cavity, 2. Pharynx, 3. Trachea, 4. Lungs, 5. Bronchi, 6. Alveoli, 7. Bronchiole, 8. Diaphragm

Q. Which of the following regions is/are lined by pseudostratified columnar ciliated glandular epithelium?

1. Olfactory region of the nasal chamber
2. Trachea
3. Respiratory region of the nasal chamber
4. All the above

Q. Which of the following is a correct sequence of movement of air during inspiration?

1. nose $\to$ nasal cavity $\to$ pharynx $\to$ trachea $\to$larynx $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries
2. nasal cavity $\to$nose $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries
3. nose $\to$ nasal cavity $\to$ larynx $\to$pharynx $\to$ trachea $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries
4. nose $\to$ nasal cavity $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ primary bronchi $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ alveoli $\to$ blood capillaries

Q. Which of the following is/are correct about the respiratory zone of the human respiratory system?

1. Alveolar sacs are part of the respiratory zone
2. The main function is to transport air into the lungs
3. The respiratory zone is involved in exchange of gases between blood and air
4. The bronchi and bronchioles are the most important parts of the respiratory zone