,BIOD 151 Module 2 | Practice Q&A | 2026/2027 | Anatomy | Portage
Learning
1. How many lobes does the right human lung have?
A) 2
B) 3
C) 4
D) 1
Correct Answer: 3
Rationale: The right lung has three lobes: superior, middle, and inferior. The
left lung has two lobes to accommodate the heart. This anatomical difference
is consistently tested in respiratory system assessments to ensure students
can distinguish right from left lung anatomy .
2. Air and food both pass through which of the following structures?
A) Trachea
B) Nasopharynx
C) Oropharynx
D) Alveoli
Correct Answer: Oropharynx
Rationale: The oropharynx is a common passageway for both air and food.
The trachea carries only air, the nasopharynx primarily air, and alveoli are
sites of gas exchange. This anatomical distinction is essential for
understanding the respiratory and digestive system interface .
3. In which of the following locations would you NOT find cartilage rings?
,A) Trachea
B) Larynx
C) Bronchioles
D) Primary bronchi
Correct Answer: Bronchioles
Rationale: Bronchioles lack cartilage rings; their walls contain smooth muscle
that regulates airflow. The trachea, larynx, and primary bronchi all have
cartilaginous support. This histological difference is important for
understanding airway resistance regulation and respiratory pathology .
4. What is the correct order of the bronchial tree branches from widest to
narrowest?
A) Primary bronchi, secondary bronchi, tertiary bronchi, bronchioles
B) Bronchioles, primary bronchi, secondary bronchi, tertiary bronchi
C) Tertiary bronchi, secondary bronchi, primary bronchi, bronchioles
D) Secondary bronchi, tertiary bronchi, primary bronchi, bronchioles
Correct Answer: Primary bronchi, secondary bronchi, tertiary bronchi,
bronchioles
Rationale: The bronchial tree progressively narrows from primary (mainstem)
bronchi to secondary (lobar), tertiary (segmental), and then to bronchioles.
This branching pattern is essential for understanding airflow distribution and
is regularly assessed in respiratory anatomy .
5. What happens to the epiglottis during swallowing?
A) It remains open to allow air passage
, B) It moves upward to open the trachea
C) It moves downward to cover the trachea
D) It contracts to push food into the esophagus
Correct Answer: It moves downward to cover the trachea
Rationale: During swallowing, the epiglottis folds downward to cover the
tracheal opening, preventing food or liquid from entering the airway. This
protective reflex is critical for preventing aspiration and is a frequently tested
concept in respiratory anatomy .
6. What is the primary difference between Type I and Type II alveolar cells?
A) Type I cells produce surfactant; Type II cells facilitate gas exchange
B) Type I cells are thick; Type II cells are thin
C) Type I cells facilitate gas exchange; Type II cells produce surfactant
D) Type I cells are ciliated; Type II cells are non-ciliated
Correct Answer: Type I cells facilitate gas exchange; Type II cells produce
surfactant
Rationale: Type I alveolar cells cover most of the alveolar surface and are
thin to allow gas diffusion. Type II cells produce surfactant, which reduces
surface tension and maintains alveolar stability. Type II cells can also
regenerate Type I cells .
7. During inhalation, air is drawn into the lungs by:
A) Positive pressure from muscular contraction
B) Negative pressure created by expanding the thoracic cavity
C) Active pumping by the heart
Learning
1. How many lobes does the right human lung have?
A) 2
B) 3
C) 4
D) 1
Correct Answer: 3
Rationale: The right lung has three lobes: superior, middle, and inferior. The
left lung has two lobes to accommodate the heart. This anatomical difference
is consistently tested in respiratory system assessments to ensure students
can distinguish right from left lung anatomy .
2. Air and food both pass through which of the following structures?
A) Trachea
B) Nasopharynx
C) Oropharynx
D) Alveoli
Correct Answer: Oropharynx
Rationale: The oropharynx is a common passageway for both air and food.
The trachea carries only air, the nasopharynx primarily air, and alveoli are
sites of gas exchange. This anatomical distinction is essential for
understanding the respiratory and digestive system interface .
3. In which of the following locations would you NOT find cartilage rings?
,A) Trachea
B) Larynx
C) Bronchioles
D) Primary bronchi
Correct Answer: Bronchioles
Rationale: Bronchioles lack cartilage rings; their walls contain smooth muscle
that regulates airflow. The trachea, larynx, and primary bronchi all have
cartilaginous support. This histological difference is important for
understanding airway resistance regulation and respiratory pathology .
4. What is the correct order of the bronchial tree branches from widest to
narrowest?
A) Primary bronchi, secondary bronchi, tertiary bronchi, bronchioles
B) Bronchioles, primary bronchi, secondary bronchi, tertiary bronchi
C) Tertiary bronchi, secondary bronchi, primary bronchi, bronchioles
D) Secondary bronchi, tertiary bronchi, primary bronchi, bronchioles
Correct Answer: Primary bronchi, secondary bronchi, tertiary bronchi,
bronchioles
Rationale: The bronchial tree progressively narrows from primary (mainstem)
bronchi to secondary (lobar), tertiary (segmental), and then to bronchioles.
This branching pattern is essential for understanding airflow distribution and
is regularly assessed in respiratory anatomy .
5. What happens to the epiglottis during swallowing?
A) It remains open to allow air passage
, B) It moves upward to open the trachea
C) It moves downward to cover the trachea
D) It contracts to push food into the esophagus
Correct Answer: It moves downward to cover the trachea
Rationale: During swallowing, the epiglottis folds downward to cover the
tracheal opening, preventing food or liquid from entering the airway. This
protective reflex is critical for preventing aspiration and is a frequently tested
concept in respiratory anatomy .
6. What is the primary difference between Type I and Type II alveolar cells?
A) Type I cells produce surfactant; Type II cells facilitate gas exchange
B) Type I cells are thick; Type II cells are thin
C) Type I cells facilitate gas exchange; Type II cells produce surfactant
D) Type I cells are ciliated; Type II cells are non-ciliated
Correct Answer: Type I cells facilitate gas exchange; Type II cells produce
surfactant
Rationale: Type I alveolar cells cover most of the alveolar surface and are
thin to allow gas diffusion. Type II cells produce surfactant, which reduces
surface tension and maintains alveolar stability. Type II cells can also
regenerate Type I cells .
7. During inhalation, air is drawn into the lungs by:
A) Positive pressure from muscular contraction
B) Negative pressure created by expanding the thoracic cavity
C) Active pumping by the heart
