Test Bank For Egan’s Fundamentals of Respiratory
Care 13th Edition by Robert M. Kacmark James K
and Albert Verified Questions and Answers
2026/2027
GRADE A+
CHAPTERS 1-12
• Chapter 1 – Fundamentals of Nursing, Patient Safety, and Infection Control
• Chapter 2 – Health Assessment, Physical Examination, and Vital Signs
• Chapter 3 – Pharmacology, Medication Administration, and Patient Education
• Chapter 4 – Cardiovascular Physiology, Disorders, and Nursing Management
• Chapter 5 – Respiratory Physiology, Gas Exchange, and Acid–Base Regulation
• Chapter 6 – Renal and Genitourinary Function, Fluid and Electrolyte Balance
• Chapter 7 – Neurological Function, Sensory Perception, and Neurologic Disorders
• Chapter 8 – Musculoskeletal System, Mobility, and Pain Management
• Chapter 9 – Hematology, Immunology, and Coagulation Disorders
• Chapter 10 – Integumentary System, Wound Healing, and Skin Disorders
• Chapter 11 – Gastrointestinal Physiology, Digestion, Absorption, and Nutritional
Balance
• Chapter 12 – Endocrine Physiology, Hormonal Regulation, and Metabolic Disorders
Chapter 1: Pediatric Respiratory Critical Care, Advanced Interventions, and
Pharmacology
,1. During quiet breathing in a healthy adult, the diaphragm plays the most important role
in ventilation. The muscle contracts and moves downward during inspiration, causing
changes in thoracic pressure and lung volume. These pressure changes allow air to move
from the atmosphere into the lungs following basic gas laws. Considering the physiology of
normal inspiration, which statement best explains how the diaphragm facilitates airflow
into the lungs?
A. The diaphragm relaxes and increases intrathoracic pressure
B. The diaphragm contracts and decreases lung volume
C. The diaphragm increases atmospheric pressure inside the lungs
D. The diaphragm contracts, enlarges the thoracic cavity, and lowers intrapulmonary
pressure allowing air to flow inward
Rationale: Inspiration occurs when the diaphragm contracts and moves downward,
increasing the vertical dimension of the thoracic cavity. This expansion decreases
intrapulmonary pressure below atmospheric pressure, allowing air to flow into the lungs. This
pressure gradient is fundamental to pulmonary ventilation and is explained by Boyle’s law,
which states that pressure and volume are inversely related.
2. The respiratory system is responsible for maintaining adequate gas exchange between
the body and the external environment. Oxygen must be delivered to tissues while carbon
dioxide produced by metabolism must be removed efficiently. Multiple structures within
the respiratory tract contribute to this process. Which anatomical structure is the primary
site where oxygen and carbon dioxide exchange occurs?
A. Trachea
B. Bronchi
C. Bronchioles
D. Alveoli
Rationale: The alveoli are the primary sites of gas exchange in the lungs. Their extremely
thin walls and extensive capillary network allow efficient diffusion of oxygen into the blood and
carbon dioxide out of the bloodstream. The enormous surface area created by millions of alveoli
maximizes gas exchange efficiency.
3. The conducting airways of the respiratory system serve several protective and
conditioning functions before air reaches the delicate alveoli. These structures warm,
humidify, and filter incoming air to protect lower respiratory structures from injury.
Considering these functions, which mechanism plays the most important role in removing
inhaled particles and microorganisms from the respiratory tract?
A. Elastic recoil of the lungs
B. Alveolar diffusion
C. Pulmonary circulation
D. Mucociliary clearance mechanism
,Rationale: The mucociliary escalator is a critical defense mechanism in the respiratory
tract. Ciliated epithelial cells move mucus upward toward the throat, carrying trapped particles,
pathogens, and debris out of the lungs. This process prevents contaminants from reaching the
alveoli and helps maintain airway cleanliness.
4. Surfactant is a crucial substance produced within the lungs that significantly affects
respiratory mechanics. Without adequate surfactant, alveoli would collapse easily during
expiration due to surface tension forces. Which specialized cells are responsible for
producing pulmonary surfactant in the lungs?
A. Type I alveolar cells
B. Alveolar macrophages
C. Bronchial epithelial cells
D. Type II alveolar cells
Rationale: Type II alveolar cells synthesize and secrete pulmonary surfactant, a
phospholipid-rich substance that reduces surface tension within the alveoli. This reduction
prevents alveolar collapse during exhalation and improves lung compliance, making breathing
easier and more efficient.
5. The respiratory control center located in the brain regulates the rhythm and depth of
breathing automatically. This neural control ensures that ventilation adapts to changing
metabolic demands during rest, exercise, or illness. Which structure in the brain primarily
controls the basic rhythm of breathing?
A. Cerebellum
B. Hypothalamus
C. Cerebral cortex
D. Medulla oblongata
Rationale: The medulla oblongata contains the primary respiratory control centers
responsible for generating the basic rhythm of breathing. These centers respond to chemical
signals such as carbon dioxide levels and blood pH, adjusting ventilation to maintain
homeostasis.
6. Lung compliance is an important mechanical property that determines how easily the
lungs expand during inspiration. Changes in compliance can significantly affect breathing
effort and ventilation efficiency. Which condition would most likely decrease lung
compliance and make the lungs more difficult to expand?
A. Emphysema
B. Aging lungs
C. Increased surfactant production
D. Pulmonary fibrosis
, Rationale: Pulmonary fibrosis causes stiffening of lung tissue due to scar formation, which
significantly reduces lung compliance. As a result, greater pressure is required to expand the
lungs during inspiration, increasing the work of breathing.
7. The respiratory membrane plays a critical role in gas exchange between the alveoli and
pulmonary capillaries. This membrane must be extremely thin to allow rapid diffusion of
oxygen and carbon dioxide. Which factor would most significantly impair gas exchange
across this membrane?
A. Increased hemoglobin concentration
B. Increased alveolar surface area
C. Increased ventilation rate
D. Thickening of the alveolar-capillary membrane
Rationale: Thickening of the respiratory membrane increases diffusion distance, slowing
gas exchange and reducing oxygen delivery to the bloodstream. Conditions such as pulmonary
edema or fibrosis commonly cause this problem.
8. Ventilation and perfusion must be properly matched in order for effective gas exchange
to occur in the lungs. When ventilation and blood flow are mismatched, oxygenation of the
blood becomes impaired. What is the normal ventilation-perfusion (V/Q) ratio in healthy
lungs?
A. 0.4
B. 0.6
C. 1.5
D. 0.8
Rationale: The normal V/Q ratio in healthy lungs is approximately 0.8, meaning ventilation
is slightly lower than perfusion. This balance allows optimal oxygen uptake and carbon dioxide
removal.
9. Oxygen is transported in the blood through two primary mechanisms. Most oxygen
binds to hemoglobin molecules inside red blood cells, while a smaller amount remains
dissolved in plasma. Which factor most strongly influences hemoglobin’s ability to release
oxygen to body tissues?
A. Blood glucose levels
B. Plasma sodium concentration
C. Body temperature alone
D. Partial pressure of oxygen and carbon dioxide (oxygen–hemoglobin dissociation curve
factors)
Rationale: Hemoglobin releases oxygen based on changes in PO₂, PCO₂, temperature, and
pH, which shift the oxygen-hemoglobin dissociation curve. These factors ensure tissues receive
more oxygen during periods of high metabolic activity.
Care 13th Edition by Robert M. Kacmark James K
and Albert Verified Questions and Answers
2026/2027
GRADE A+
CHAPTERS 1-12
• Chapter 1 – Fundamentals of Nursing, Patient Safety, and Infection Control
• Chapter 2 – Health Assessment, Physical Examination, and Vital Signs
• Chapter 3 – Pharmacology, Medication Administration, and Patient Education
• Chapter 4 – Cardiovascular Physiology, Disorders, and Nursing Management
• Chapter 5 – Respiratory Physiology, Gas Exchange, and Acid–Base Regulation
• Chapter 6 – Renal and Genitourinary Function, Fluid and Electrolyte Balance
• Chapter 7 – Neurological Function, Sensory Perception, and Neurologic Disorders
• Chapter 8 – Musculoskeletal System, Mobility, and Pain Management
• Chapter 9 – Hematology, Immunology, and Coagulation Disorders
• Chapter 10 – Integumentary System, Wound Healing, and Skin Disorders
• Chapter 11 – Gastrointestinal Physiology, Digestion, Absorption, and Nutritional
Balance
• Chapter 12 – Endocrine Physiology, Hormonal Regulation, and Metabolic Disorders
Chapter 1: Pediatric Respiratory Critical Care, Advanced Interventions, and
Pharmacology
,1. During quiet breathing in a healthy adult, the diaphragm plays the most important role
in ventilation. The muscle contracts and moves downward during inspiration, causing
changes in thoracic pressure and lung volume. These pressure changes allow air to move
from the atmosphere into the lungs following basic gas laws. Considering the physiology of
normal inspiration, which statement best explains how the diaphragm facilitates airflow
into the lungs?
A. The diaphragm relaxes and increases intrathoracic pressure
B. The diaphragm contracts and decreases lung volume
C. The diaphragm increases atmospheric pressure inside the lungs
D. The diaphragm contracts, enlarges the thoracic cavity, and lowers intrapulmonary
pressure allowing air to flow inward
Rationale: Inspiration occurs when the diaphragm contracts and moves downward,
increasing the vertical dimension of the thoracic cavity. This expansion decreases
intrapulmonary pressure below atmospheric pressure, allowing air to flow into the lungs. This
pressure gradient is fundamental to pulmonary ventilation and is explained by Boyle’s law,
which states that pressure and volume are inversely related.
2. The respiratory system is responsible for maintaining adequate gas exchange between
the body and the external environment. Oxygen must be delivered to tissues while carbon
dioxide produced by metabolism must be removed efficiently. Multiple structures within
the respiratory tract contribute to this process. Which anatomical structure is the primary
site where oxygen and carbon dioxide exchange occurs?
A. Trachea
B. Bronchi
C. Bronchioles
D. Alveoli
Rationale: The alveoli are the primary sites of gas exchange in the lungs. Their extremely
thin walls and extensive capillary network allow efficient diffusion of oxygen into the blood and
carbon dioxide out of the bloodstream. The enormous surface area created by millions of alveoli
maximizes gas exchange efficiency.
3. The conducting airways of the respiratory system serve several protective and
conditioning functions before air reaches the delicate alveoli. These structures warm,
humidify, and filter incoming air to protect lower respiratory structures from injury.
Considering these functions, which mechanism plays the most important role in removing
inhaled particles and microorganisms from the respiratory tract?
A. Elastic recoil of the lungs
B. Alveolar diffusion
C. Pulmonary circulation
D. Mucociliary clearance mechanism
,Rationale: The mucociliary escalator is a critical defense mechanism in the respiratory
tract. Ciliated epithelial cells move mucus upward toward the throat, carrying trapped particles,
pathogens, and debris out of the lungs. This process prevents contaminants from reaching the
alveoli and helps maintain airway cleanliness.
4. Surfactant is a crucial substance produced within the lungs that significantly affects
respiratory mechanics. Without adequate surfactant, alveoli would collapse easily during
expiration due to surface tension forces. Which specialized cells are responsible for
producing pulmonary surfactant in the lungs?
A. Type I alveolar cells
B. Alveolar macrophages
C. Bronchial epithelial cells
D. Type II alveolar cells
Rationale: Type II alveolar cells synthesize and secrete pulmonary surfactant, a
phospholipid-rich substance that reduces surface tension within the alveoli. This reduction
prevents alveolar collapse during exhalation and improves lung compliance, making breathing
easier and more efficient.
5. The respiratory control center located in the brain regulates the rhythm and depth of
breathing automatically. This neural control ensures that ventilation adapts to changing
metabolic demands during rest, exercise, or illness. Which structure in the brain primarily
controls the basic rhythm of breathing?
A. Cerebellum
B. Hypothalamus
C. Cerebral cortex
D. Medulla oblongata
Rationale: The medulla oblongata contains the primary respiratory control centers
responsible for generating the basic rhythm of breathing. These centers respond to chemical
signals such as carbon dioxide levels and blood pH, adjusting ventilation to maintain
homeostasis.
6. Lung compliance is an important mechanical property that determines how easily the
lungs expand during inspiration. Changes in compliance can significantly affect breathing
effort and ventilation efficiency. Which condition would most likely decrease lung
compliance and make the lungs more difficult to expand?
A. Emphysema
B. Aging lungs
C. Increased surfactant production
D. Pulmonary fibrosis
, Rationale: Pulmonary fibrosis causes stiffening of lung tissue due to scar formation, which
significantly reduces lung compliance. As a result, greater pressure is required to expand the
lungs during inspiration, increasing the work of breathing.
7. The respiratory membrane plays a critical role in gas exchange between the alveoli and
pulmonary capillaries. This membrane must be extremely thin to allow rapid diffusion of
oxygen and carbon dioxide. Which factor would most significantly impair gas exchange
across this membrane?
A. Increased hemoglobin concentration
B. Increased alveolar surface area
C. Increased ventilation rate
D. Thickening of the alveolar-capillary membrane
Rationale: Thickening of the respiratory membrane increases diffusion distance, slowing
gas exchange and reducing oxygen delivery to the bloodstream. Conditions such as pulmonary
edema or fibrosis commonly cause this problem.
8. Ventilation and perfusion must be properly matched in order for effective gas exchange
to occur in the lungs. When ventilation and blood flow are mismatched, oxygenation of the
blood becomes impaired. What is the normal ventilation-perfusion (V/Q) ratio in healthy
lungs?
A. 0.4
B. 0.6
C. 1.5
D. 0.8
Rationale: The normal V/Q ratio in healthy lungs is approximately 0.8, meaning ventilation
is slightly lower than perfusion. This balance allows optimal oxygen uptake and carbon dioxide
removal.
9. Oxygen is transported in the blood through two primary mechanisms. Most oxygen
binds to hemoglobin molecules inside red blood cells, while a smaller amount remains
dissolved in plasma. Which factor most strongly influences hemoglobin’s ability to release
oxygen to body tissues?
A. Blood glucose levels
B. Plasma sodium concentration
C. Body temperature alone
D. Partial pressure of oxygen and carbon dioxide (oxygen–hemoglobin dissociation curve
factors)
Rationale: Hemoglobin releases oxygen based on changes in PO₂, PCO₂, temperature, and
pH, which shift the oxygen-hemoglobin dissociation curve. These factors ensure tissues receive
more oxygen during periods of high metabolic activity.
