Question 1

Which of the following structures is NOT part of the upper respiratory tract?

Accepted Answer

Trachea

Question 2

The respiratory mucosa consists of which two main components?

Accepted Answer

Ciliated epithelium and lamina propria

Question 3

Which function is primarily associated with the nasal conchae?

Accepted Answer

Warming and humidifying incoming air

Question 4

A patient is experiencing difficulty in speech production. Which structure is most likely affected?

Accepted Answer

Vocal folds

Question 5

Which equation best represents the relationship between airway resistance ($$R$$), airway radius ($$r$$), and airflow ($$Q) in $$the respiratory system?

Accepted Answer

$$R \propto \frac{1}{r^4$}$$

Question 6

Which of the following is TRUE regarding the right primary bronchus compared to the left?

Accepted Answer

It is larger in diameter and descends at a steeper angle.

Question 7

Which type of epithelium lines most of the conducting portion of the respiratory tract?

Accepted Answer

Pseudostratified ciliated columnar epithelium

Question 8

Bronchodilation is primarily caused by which physiological mechanism?

Accepted Answer

Sympathetic nervous system activation

Question 9

Which of the following best describes the function of the pleural fluid?

Accepted Answer

It lubricates and reduces friction between pleural layers.

Question 10

A blockage in the terminal bronchioles would most directly affect which part of the respiratory system?

Accepted Answer

The alveolar sacs

Question 11

Which of the following is a correct sequence of airflow through the upper respiratory tract?

Accepted Answer

Nasal cavity → pharynx → larynx → trachea

Question 12

Which cartilage forms the anterior and lateral walls of the larynx and is commonly known as the Adam's apple?

Accepted Answer

Thyroid cartilage

Question 13

During an allergic reaction, which process is most likely to occur in the bronchioles?

Accepted Answer

Bronchoconstriction due to histamine release

Question 14

Which of the following statements about the left lung is correct?

Accepted Answer

It is longer and has a cardiac notch.

Question 15

Which structure divides the nasopharynx from the oropharynx?

Accepted Answer

Soft palate

Question 16

Which of the following is a function of the respiratory defense system?

Accepted Answer

Removal of particles and pathogens from inhaled air

Question 17

Which equation best describes the pressure difference ($$\Delta P) $$required for airflow ($$Q) $$through the respiratory tract, given resistance ($$R$$)?

Accepted Answer

$$\Delta P = Q 	imes R$$

Question 18

Which of the following is TRUE about the bronchopulmonary segments?

Accepted Answer

The right lung has 10 segments, the left lung has 8 or 9.

Question 19

Which of the following best explains why breathing through the mouth bypasses an important respiratory step?

Accepted Answer

It bypasses the nasal mucosa, reducing warming and humidification of air.

Question 20

Which of the following is the smallest functional unit of the lung where gas exchange occurs?

Accepted Answer

Alveoli

Anatomy and Physiology of the Respiratory System: Structure and Function

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