PORTAGE LEARNING
BIOD 152 Module 4 Exam
Official Practice Exam
2026/2027 Edition
Questions Minutes Passing Score Recertification
75 90 80% Annual
TABLE OF CONTENTS
Section 1 Anatomy of the Respiratory System Q1 - Q15
Section 2 Mechanics of Breathing Q16 - Q30
Section 3 Gas Exchange and Transport Q31 - Q45
Section 4 Control of Respiration Q46 - Q60
Section 5 Respiratory Pathophysiology Q61 - Q75
INSTRUCTIONS
This practice exam contains 75 multiple-choice questions divided into five sections. Each
question has four answer options (A through D). Select the single best answer for each
question. You have 90 minutes to complete this exam. A passing score of 80% (60 correct
out of 75) is required. The correct answer and rationale are provided immediately after
each question for study purposes.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 1
,Section 1: Anatomy of the Respiratory System | 2026/2027 2026/2027
Q1 Question 1 of 75
A 34-year-old male presents to the ENT clinic with chronic sinusitis. The physician
explains that the paranasal sinuses drain into the nasal cavity through specific
openings. The maxillary sinus normally drains into which part of the nasal cavity?
A. Superior meatus
B. Inferior meatus
C. Middle meatus
D. Sphenoethmoidal recess
Correct Answer: C
Rationale:
The maxillary sinus drains into the middle meatus via the semilunar hiatus. The superior
meatus receives drainage from posterior ethmoid air cells, while the inferior meatus
contains the opening of the nasolacrimal duct.
Q2 Question 2 of 75
A medical student is studying the larynx and learns that the vocal folds are attached
to the arytenoid cartilages posteriorly and the thyroid cartilage anteriorly. During
quiet breathing, the vocal folds are primarily abducted by which muscle?
A. Posterior cricoarytenoid
B. Lateral cricoarytenoid
C. Thyroarytenoid
D. Vocalis
Correct Answer: A
Rationale:
The posterior cricoarytenoid is the sole abductor of the vocal folds and is critical for
maintaining airway patency during quiet respiration. The lateral cricoarytenoid adducts
the vocal folds, while the thyroarytenoid and vocalis tense and shorten the folds.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 2
,Q3 Question 3 of 75
A 45-year-old woman undergoes thyroid surgery and subsequently presents with
hoarseness. The surgeon is concerned about injury to a nerve that passes deep to the
inferior thyroid artery and innervates all intrinsic laryngeal muscles except the
cricothyroid. This nerve is the:
A. Superior laryngeal nerve
B. Recurrent laryngeal nerve
C. Glossopharyngeal nerve
D. Hypoglossal nerve
Correct Answer: B
Rationale:
The recurrent laryngeal nerve innervates all intrinsic laryngeal muscles except the
cricothyroid (supplied by the external branch of the superior laryngeal nerve). It passes
deep to the inferior thyroid artery, making it vulnerable during thyroid surgery.
Q4 Question 4 of 75
An anatomy instructor asks a student to identify the structure that separates the
nasal cavity from the oral cavity. The correct answer is the:
A. Hard palate
B. Nasal septum
C. Soft palate
D. Cribriform plate
Correct Answer: A
Rationale:
The hard palate forms the floor of the nasal cavity and the roof of the oral cavity,
separating the two spaces. The nasal septum divides the nasal cavity into left and right
halves, and the cribriform plate is part of the ethmoid bone that allows olfactory nerve
passage.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 3
, Q5 Question 5 of 75
During a bronchoscopy, the pulmonologist visualizes the carina at the level of the
sternal angle. The carina represents the location where the:
A. Trachea bifurcates into main bronchi
B. Larynx transitions into the trachea
C. Right main bronchus gives off the upper lobe bronchus
D. Pharynx meets the larynx
Correct Answer: A
Rationale:
The carina is the keel-shaped ridge at the bifurcation of the trachea into the right and
left main bronchi, located at the level of the sternal angle (T4-T5). It is a key
anatomical landmark during bronchoscopy.
Q6 Question 6 of 75
A radiologist reviewing a chest X-ray notes that the right lung has three lobes while
the left lung has two. The structure responsible for dividing the right lung into its
three lobes is the:
A. Cardiac notch
B. Oblique fissure only
C. Lingula
D. Horizontal and oblique fissures
Correct Answer: D
Rationale:
The right lung is divided into three lobes by the horizontal fissure (separating upper
from middle lobe) and the oblique fissure (separating middle from lower lobe). The left
lung has only an oblique fissure creating two lobes.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 4
BIOD 152 Module 4 Exam
Official Practice Exam
2026/2027 Edition
Questions Minutes Passing Score Recertification
75 90 80% Annual
TABLE OF CONTENTS
Section 1 Anatomy of the Respiratory System Q1 - Q15
Section 2 Mechanics of Breathing Q16 - Q30
Section 3 Gas Exchange and Transport Q31 - Q45
Section 4 Control of Respiration Q46 - Q60
Section 5 Respiratory Pathophysiology Q61 - Q75
INSTRUCTIONS
This practice exam contains 75 multiple-choice questions divided into five sections. Each
question has four answer options (A through D). Select the single best answer for each
question. You have 90 minutes to complete this exam. A passing score of 80% (60 correct
out of 75) is required. The correct answer and rationale are provided immediately after
each question for study purposes.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 1
,Section 1: Anatomy of the Respiratory System | 2026/2027 2026/2027
Q1 Question 1 of 75
A 34-year-old male presents to the ENT clinic with chronic sinusitis. The physician
explains that the paranasal sinuses drain into the nasal cavity through specific
openings. The maxillary sinus normally drains into which part of the nasal cavity?
A. Superior meatus
B. Inferior meatus
C. Middle meatus
D. Sphenoethmoidal recess
Correct Answer: C
Rationale:
The maxillary sinus drains into the middle meatus via the semilunar hiatus. The superior
meatus receives drainage from posterior ethmoid air cells, while the inferior meatus
contains the opening of the nasolacrimal duct.
Q2 Question 2 of 75
A medical student is studying the larynx and learns that the vocal folds are attached
to the arytenoid cartilages posteriorly and the thyroid cartilage anteriorly. During
quiet breathing, the vocal folds are primarily abducted by which muscle?
A. Posterior cricoarytenoid
B. Lateral cricoarytenoid
C. Thyroarytenoid
D. Vocalis
Correct Answer: A
Rationale:
The posterior cricoarytenoid is the sole abductor of the vocal folds and is critical for
maintaining airway patency during quiet respiration. The lateral cricoarytenoid adducts
the vocal folds, while the thyroarytenoid and vocalis tense and shorten the folds.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 2
,Q3 Question 3 of 75
A 45-year-old woman undergoes thyroid surgery and subsequently presents with
hoarseness. The surgeon is concerned about injury to a nerve that passes deep to the
inferior thyroid artery and innervates all intrinsic laryngeal muscles except the
cricothyroid. This nerve is the:
A. Superior laryngeal nerve
B. Recurrent laryngeal nerve
C. Glossopharyngeal nerve
D. Hypoglossal nerve
Correct Answer: B
Rationale:
The recurrent laryngeal nerve innervates all intrinsic laryngeal muscles except the
cricothyroid (supplied by the external branch of the superior laryngeal nerve). It passes
deep to the inferior thyroid artery, making it vulnerable during thyroid surgery.
Q4 Question 4 of 75
An anatomy instructor asks a student to identify the structure that separates the
nasal cavity from the oral cavity. The correct answer is the:
A. Hard palate
B. Nasal septum
C. Soft palate
D. Cribriform plate
Correct Answer: A
Rationale:
The hard palate forms the floor of the nasal cavity and the roof of the oral cavity,
separating the two spaces. The nasal septum divides the nasal cavity into left and right
halves, and the cribriform plate is part of the ethmoid bone that allows olfactory nerve
passage.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 3
, Q5 Question 5 of 75
During a bronchoscopy, the pulmonologist visualizes the carina at the level of the
sternal angle. The carina represents the location where the:
A. Trachea bifurcates into main bronchi
B. Larynx transitions into the trachea
C. Right main bronchus gives off the upper lobe bronchus
D. Pharynx meets the larynx
Correct Answer: A
Rationale:
The carina is the keel-shaped ridge at the bifurcation of the trachea into the right and
left main bronchi, located at the level of the sternal angle (T4-T5). It is a key
anatomical landmark during bronchoscopy.
Q6 Question 6 of 75
A radiologist reviewing a chest X-ray notes that the right lung has three lobes while
the left lung has two. The structure responsible for dividing the right lung into its
three lobes is the:
A. Cardiac notch
B. Oblique fissure only
C. Lingula
D. Horizontal and oblique fissures
Correct Answer: D
Rationale:
The right lung is divided into three lobes by the horizontal fissure (separating upper
from middle lobe) and the oblique fissure (separating middle from lower lobe). The left
lung has only an oblique fissure creating two lobes.
BIOD 152 Module 4 -- 2026/2027 | Passing Score: 80% | Page 4
