BIOD 152 Lab 6 Exam Actual 2026/2027
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Pass Guaranteed – A+ Graded
Content Area Overview:
This actual examination reflects the foundational knowledge required for success on the BIOD 152 Lab 6
Exam. It is designed to evaluate the student's understanding of the respiratory system's structure and
function, including the identification of anatomical structures, the mechanics of breathing, respiratory
volumes, gas exchange, and histology. Questions are structured to assess recall of key terms and
structures, application of physiological principles to clinical scenarios, and analysis of the system's role in
homeostasis. This authentic question bank represents the real exams used in the course and serves as a
comprehensive resource for students demonstrating mastery of respiratory system content.
Section 1: Gross Anatomy and Identification (Questions 1–8)
Q1. Air entering the nasal cavity passes through the pharynx and then enters the larynx. The larynx is
commonly known as the:
A. Windpipe
B. Voice box
C. Food pipe
D. Bronchial tree
Rationale: The best answer is B. The larynx is commonly called the voice box because it houses the vocal
cords (vocal folds) that vibrate to produce sound. It also serves as a passageway for air between the
pharynx and the trachea, and its epiglottis prevents food and liquid from entering the lower respiratory
tract during swallowing. The windpipe is the trachea, the food pipe is the esophagus, and the bronchial
tree refers to the branching airways within the lungs.
Correct Answer: B
, Q2. The trachea is reinforced with C-shaped rings of cartilage. The open portion of the C-shape faces:
A. Anteriorly, toward the sternum
B. Posteriorly, toward the esophagus
C. Laterally, toward the lungs
D. Superiorly, toward the larynx
Rationale: The best answer is B. The C-shaped cartilaginous rings of the trachea are open posteriorly,
which allows the esophagus to expand anteriorly into that space during swallowing. This anatomical
arrangement prevents the trachea from collapsing during breathing while still permitting the esophagus
to distend when food passes through. The solid anterior portion provides structural support to maintain
an open airway.
Correct Answer: B
Q3. The right lung has three lobes, while the left lung has only two lobes. The left lung has fewer lobes
primarily because:
A. It is smaller due to the heart occupying space on the left side of the mediastinum
B. The left main bronchus is shorter
C. The left lung has more alveoli
D. The left pleural cavity is larger
Rationale: The best answer is A. The left lung has only two lobes (superior and inferior) because the
heart, located predominantly on the left side of the mediastinum, creates a cardiac notch in the left lung
that reduces its volume. The right lung has three lobes (superior, middle, and inferior) because there is
more space available on the right side. The left main bronchus is actually longer and more horizontal
than the right, which is why aspirated objects more commonly enter the right lung.
Correct Answer: A
Q4. The space between the visceral pleura and the parietal pleura is called the:
A. Mediastinum
B. Pleural cavity
C. Alveolar sac
D. Pericardial cavity
Rationale: The best answer is B. The pleural cavity is the thin, fluid-filled potential space between the
visceral pleura (which covers the lung surface) and the parietal pleura (which lines the thoracic wall).
This cavity contains a small amount of serous fluid that reduces friction during breathing. If air enters
100% Verified | Detailed Rationales –
Pass Guaranteed – A+ Graded
Content Area Overview:
This actual examination reflects the foundational knowledge required for success on the BIOD 152 Lab 6
Exam. It is designed to evaluate the student's understanding of the respiratory system's structure and
function, including the identification of anatomical structures, the mechanics of breathing, respiratory
volumes, gas exchange, and histology. Questions are structured to assess recall of key terms and
structures, application of physiological principles to clinical scenarios, and analysis of the system's role in
homeostasis. This authentic question bank represents the real exams used in the course and serves as a
comprehensive resource for students demonstrating mastery of respiratory system content.
Section 1: Gross Anatomy and Identification (Questions 1–8)
Q1. Air entering the nasal cavity passes through the pharynx and then enters the larynx. The larynx is
commonly known as the:
A. Windpipe
B. Voice box
C. Food pipe
D. Bronchial tree
Rationale: The best answer is B. The larynx is commonly called the voice box because it houses the vocal
cords (vocal folds) that vibrate to produce sound. It also serves as a passageway for air between the
pharynx and the trachea, and its epiglottis prevents food and liquid from entering the lower respiratory
tract during swallowing. The windpipe is the trachea, the food pipe is the esophagus, and the bronchial
tree refers to the branching airways within the lungs.
Correct Answer: B
, Q2. The trachea is reinforced with C-shaped rings of cartilage. The open portion of the C-shape faces:
A. Anteriorly, toward the sternum
B. Posteriorly, toward the esophagus
C. Laterally, toward the lungs
D. Superiorly, toward the larynx
Rationale: The best answer is B. The C-shaped cartilaginous rings of the trachea are open posteriorly,
which allows the esophagus to expand anteriorly into that space during swallowing. This anatomical
arrangement prevents the trachea from collapsing during breathing while still permitting the esophagus
to distend when food passes through. The solid anterior portion provides structural support to maintain
an open airway.
Correct Answer: B
Q3. The right lung has three lobes, while the left lung has only two lobes. The left lung has fewer lobes
primarily because:
A. It is smaller due to the heart occupying space on the left side of the mediastinum
B. The left main bronchus is shorter
C. The left lung has more alveoli
D. The left pleural cavity is larger
Rationale: The best answer is A. The left lung has only two lobes (superior and inferior) because the
heart, located predominantly on the left side of the mediastinum, creates a cardiac notch in the left lung
that reduces its volume. The right lung has three lobes (superior, middle, and inferior) because there is
more space available on the right side. The left main bronchus is actually longer and more horizontal
than the right, which is why aspirated objects more commonly enter the right lung.
Correct Answer: A
Q4. The space between the visceral pleura and the parietal pleura is called the:
A. Mediastinum
B. Pleural cavity
C. Alveolar sac
D. Pericardial cavity
Rationale: The best answer is B. The pleural cavity is the thin, fluid-filled potential space between the
visceral pleura (which covers the lung surface) and the parietal pleura (which lines the thoracic wall).
This cavity contains a small amount of serous fluid that reduces friction during breathing. If air enters
