BIOL 252 Human Anatomy & Physiology II with Lab Module
3 Exam Review | 75+ Practice Questions & Answers with
Explanations | Portage Learning LockDown Browser Study
Guide | PDF
The BIOL 252 Human Anatomy & Physiology II with Lab Module 3 Exam using this
comprehensive 75+ question practice exam with detailed answers and explanations.
Covers respiratory anatomy and physiology, pulmonary ventilation, gas exchange, oxygen
and carbon dioxide transport, acid-base balance, respiratory regulation, lung volumes and
capacities, and respiratory disorders. Ideal for Portage Learning LockDown Browser
Module 3 exam preparation, self-assessment, and final review.
1. Which organ serves as the primary site of gas exchange between the atmosphere
and the bloodstream in the respiratory system?
A. Trachea
B. Bronchi
C. Larynx
D. Lungs
Answer: D. Lungs
The lungs contain millions of alveoli where oxygen diffuses into the blood and carbon
dioxide diffuses out for exhalation.
2. Which structure prevents food and liquids from entering the trachea during
swallowing?
A. Glottis
B. Uvula
C. Soft palate
D. Epiglottis
Answer: D. Epiglottis
, The epiglottis folds over the laryngeal opening during swallowing, directing food into the
esophagus instead of the airway.
3. Which respiratory structure contains the vocal cords and is commonly referred to
as the voice box?
A. Pharynx
B. Trachea
C. Bronchus
D. Larynx
Answer: D. Larynx
The larynx houses the vocal cords and functions in sound production while protecting the
lower respiratory tract.
4. Which airway is reinforced with C-shaped rings of hyaline cartilage to maintain an
open passage for airflow?
A. Bronchiole
B. Alveolar duct
C. Nasal cavity
D. Trachea
Answer: D. Trachea
The trachea is supported by C-shaped cartilage rings that prevent airway collapse while
allowing flexibility during swallowing.
5. Which structures are the smallest conducting airways that lack cartilage and
regulate airflow into the alveoli?
A. Primary bronchi
B. Secondary bronchi
C. Trachea
D. Bronchioles
Answer: D. Bronchioles
, Bronchioles contain smooth muscle that adjusts airway diameter, controlling airflow to the
alveoli.
6. Which microscopic structures are the primary sites where oxygen and carbon
dioxide diffuse between air and blood?
A. Bronchi
B. Bronchioles
C. Trachea
D. Alveoli
Answer: D. Alveoli
Alveoli possess thin walls and extensive capillary networks that maximize efficient gas
exchange.
7. Which cells within the alveoli produce surfactant to reduce surface tension and
prevent alveolar collapse?
A. Type I alveolar cells
B. Macrophages
C. Goblet cells
D. Type II alveolar cells
Answer: D. Type II alveolar cells
Type II alveolar cells secrete pulmonary surfactant, reducing surface tension and making
lung expansion easier.
8. Which muscle is primarily responsible for normal quiet inspiration?
A. External oblique
B. Internal intercostal muscles
C. Rectus abdominis
D. Diaphragm
Answer: D. Diaphragm
3 Exam Review | 75+ Practice Questions & Answers with
Explanations | Portage Learning LockDown Browser Study
Guide | PDF
The BIOL 252 Human Anatomy & Physiology II with Lab Module 3 Exam using this
comprehensive 75+ question practice exam with detailed answers and explanations.
Covers respiratory anatomy and physiology, pulmonary ventilation, gas exchange, oxygen
and carbon dioxide transport, acid-base balance, respiratory regulation, lung volumes and
capacities, and respiratory disorders. Ideal for Portage Learning LockDown Browser
Module 3 exam preparation, self-assessment, and final review.
1. Which organ serves as the primary site of gas exchange between the atmosphere
and the bloodstream in the respiratory system?
A. Trachea
B. Bronchi
C. Larynx
D. Lungs
Answer: D. Lungs
The lungs contain millions of alveoli where oxygen diffuses into the blood and carbon
dioxide diffuses out for exhalation.
2. Which structure prevents food and liquids from entering the trachea during
swallowing?
A. Glottis
B. Uvula
C. Soft palate
D. Epiglottis
Answer: D. Epiglottis
, The epiglottis folds over the laryngeal opening during swallowing, directing food into the
esophagus instead of the airway.
3. Which respiratory structure contains the vocal cords and is commonly referred to
as the voice box?
A. Pharynx
B. Trachea
C. Bronchus
D. Larynx
Answer: D. Larynx
The larynx houses the vocal cords and functions in sound production while protecting the
lower respiratory tract.
4. Which airway is reinforced with C-shaped rings of hyaline cartilage to maintain an
open passage for airflow?
A. Bronchiole
B. Alveolar duct
C. Nasal cavity
D. Trachea
Answer: D. Trachea
The trachea is supported by C-shaped cartilage rings that prevent airway collapse while
allowing flexibility during swallowing.
5. Which structures are the smallest conducting airways that lack cartilage and
regulate airflow into the alveoli?
A. Primary bronchi
B. Secondary bronchi
C. Trachea
D. Bronchioles
Answer: D. Bronchioles
, Bronchioles contain smooth muscle that adjusts airway diameter, controlling airflow to the
alveoli.
6. Which microscopic structures are the primary sites where oxygen and carbon
dioxide diffuse between air and blood?
A. Bronchi
B. Bronchioles
C. Trachea
D. Alveoli
Answer: D. Alveoli
Alveoli possess thin walls and extensive capillary networks that maximize efficient gas
exchange.
7. Which cells within the alveoli produce surfactant to reduce surface tension and
prevent alveolar collapse?
A. Type I alveolar cells
B. Macrophages
C. Goblet cells
D. Type II alveolar cells
Answer: D. Type II alveolar cells
Type II alveolar cells secrete pulmonary surfactant, reducing surface tension and making
lung expansion easier.
8. Which muscle is primarily responsible for normal quiet inspiration?
A. External oblique
B. Internal intercostal muscles
C. Rectus abdominis
D. Diaphragm
Answer: D. Diaphragm
