Question 1

Which of the following structures is the first to encounter inhaled air as it enters the respiratory system, and what is its primary function?

Accepted Answer

Nares (nostrils); to filter, warm, and humidify incoming air

Question 2

Which type of epithelial tissue lines the vestibule of the nasal cavity, and why is this significant?

Accepted Answer

Stratified squamous epithelium; it resists mechanical stress from incoming air

Question 3

A patient has difficulty producing sound and is diagnosed with damage to the true vocal cords. Which structure is most directly affected?

Accepted Answer

Vocal folds

Question 4

Which of the following best describes the function of the cilia in the respiratory mucosa?

Accepted Answer

They propel mucus and trapped debris toward the pharynx for removal

Question 5

During swallowing, which structure moves to prevent food and liquid from entering the nasal cavity?

Accepted Answer

Uvula

Question 6

Which of the following is a correct sequence of airflow from the trachea to the alveoli?

Accepted Answer

Trachea → Primary bronchi → Secondary bronchi → Tertiary bronchi → Bronchioles → Terminal bronchioles → Respiratory bronchioles → Alveolar ducts → Alveolar sacs

Question 7

Which cell type in the alveoli is responsible for producing surfactant, and what is the function of surfactant?

Accepted Answer

Type II alveolar cells; reduces surface tension to prevent alveolar collapse

Question 8

A patient with a punctured left lung is experiencing difficulty breathing. Which anatomical feature is most likely compromised, leading to lung collapse?

Accepted Answer

Pleural cavity and its pressure

Question 9

Which of the following best explains why the right primary bronchus is more likely to receive an aspirated object than the left?

Accepted Answer

It is shorter, wider, and more vertical

Question 10

Which process is described by the equation $$	ext{O}_2 ($$lungs) $$ightarrow$$ $$	ext{O}_2 ($$blood) and $$	ext{CO}_2 ($$blood) $$ightarrow$$ $$	ext{CO}_2 ($$lungs)?

Accepted Answer

Pulmonary gas exchange

Question 11

A patient presents with a persistent cough, fever, and night sweats. A chest X-ray reveals granulomas in the lungs. Which disease is most likely, and what is the underlying cause?

Accepted Answer

Tuberculosis; Mycobacterium tuberculosis infection causing immune response and granuloma formation

Question 12

Which of the following best describes the role of the pleural fluid in the pleural cavity?

Accepted Answer

It lubricates the lungs to reduce friction during breathing

Question 13

Which of the following is NOT a function of the nasal conchae?

Accepted Answer

Producing surfactant for alveoli

Question 14

Which of the following best explains why the mucosa of the trachea contains both goblet cells and cilia?

Accepted Answer

Goblet cells secrete mucus to trap debris, and cilia move the mucus toward the pharynx for removal

Question 15

Which of the following statements about the respiratory membrane is correct?

Accepted Answer

It consists of type I alveolar cells, fused basal lamina, and capillary endothelial cells

Question 16

A patient with pleuritis is likely to experience which of the following symptoms, and what is the physiological cause?

Accepted Answer

Chest pain during inhalation and exhalation due to friction between inflamed pleural layers

Question 17

Which of the following best describes the change in cartilage and smooth muscle as the bronchial tree branches from primary bronchi to bronchioles?

Accepted Answer

Cartilage decreases and smooth muscle increases

Question 18

Which of the following is a function of the pharyngeal tonsil located in the nasopharynx?

Accepted Answer

Trapping pathogens entering the nasal cavity

Question 19

Which of the following best explains why smoking leads to a 'smoker's cough'?

Accepted Answer

Smoking damages cilia and increases mucus production, leading to mucus buildup that must be coughed out

Question 20

Which of the following best describes the function of alveolar macrophages?

Accepted Answer

They phagocytize debris and pathogens not filtered by the bronchial tree

Anatomy and Physiology of the Respiratory System: Structure and Function

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