BIOL 252 - Human Anatomy & Physiology II (Portage
Learning) Module 5: The Respiratory System - Exam Review
| 2026/2027 Edition | 200 Verified Questions - 172 Questions
with Answers
BIOL 252 Module 5 Respiratory System Exam 2026-172 QUESTIONS AND ANSWERS ALREADY GRADED A+.
100% Verified Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive exam review for BIOL 252 Module 5 focuses on the respiratory system, covering
anatomy, physiology, and clinical correlations. With 200 verified questions and detailed rationales, it is
designed to reinforce key concepts and ensure exam readiness. Updated for the 2026/2027 academic
year, this guide aligns with Portage Learning's curriculum and grading standards. Ideal for students
aiming for a top score, it provides a thorough preparation tool.
Key Features:
Anatomy of the respiratory system: structures and functions
Physiology of respiration: ventilation, gas exchange, and transport
Regulation of breathing: neural and chemical controls
Clinical correlations: respiratory disorders and their implications
200 exam-style questions with answers and rationales
Updated content per 2026/2027 guidelines
Updates for 2026:
- Revised to reflect the latest Portage Learning curriculum updates
- Incorporated new clinical scenarios and case studies
- Enhanced rationales for deeper understanding
- Aligned with current A&P II exam standards
- Added more practice questions for comprehensive coverage
Abstract:
This exam review for BIOL 252 Module 5 provides a rigorous exploration of the respiratory system, emphasizing
structural and functional relationships. It covers the upper and lower respiratory tracts, pulmonary ventilation,
gas exchange in the alveoli, and oxygen and carbon dioxide transport in the blood. The neural and chemical
regulation of respiration is examined, including the roles of the respiratory centers and chemoreceptors. Clinical
correlations highlight common respiratory pathologies such as asthma, COPD, and pneumonia, linking
pathophysiology to symptoms and treatments. Each of the 200 questions is accompanied by a rationale that
explains the correct answer and distracts, facilitating active learning. This guide is an essential resource for
mastering the respiratory system and excelling in the BIOL 252 exam.
Keywords:
Respiratory system anatomy, Pulmonary ventilation, Gas exchange, Oxygen transport, Respiratory regulation,
Respiratory disorders, BIOL 252, Portage Learning
Answer Format:
Each question is presented in a multiple-choice format with four options. The correct answer is bolded, followed by
a detailed rationale explaining why it is correct and why the other options are incorrect. This format reinforces
understanding and aids in retention.
Compliance Checklist:
Aligned with Portage Learning BIOL 252 Module 5 objectives
Page 1
, Updated for the 2026/2027 academic year
200 verified questions with accurate answers
Rationales provided for every question
Suitable for self-assessment and exam preparation
Content Area Overview:
Content Area Questions Key Topics Weight
Anatomy of the Respiratory 1-40 Upper respiratory tract, Lower respiratory 20%
System tract, Lungs and pleura, Blood supply
Pulmonary Ventilation 41-80 Boyle's Law, Respiratory pressures, Lung 20%
compliance, Airway resistance
Gas Exchange and Transport 81-120 Alveolar gas exchange, Oxygen transport, 20%
Carbon dioxide transport,
Oxygen-hemoglobin dissociation curve
Regulation of Respiration 121-160 Respiratory centers, Chemoreceptors, 20%
Hering-Breuer reflex, Exercise and altitude
effects
Clinical Correlations and 161-200 Asthma, COPD, Pneumonia, Respiratory 20%
Disorders acidosis/alkalosis
Page 2
,Q1. During a forced expiration from total lung capacity, which sequence of events
occurs in the airways?
A. Bronchodilation, increased alveolar pressure, decreased intrapleural pressure
B. Bronchoconstriction, increased alveolar pressure, increased intrapleural pressure
C. Bronchodilation, decreased alveolar pressure, increased intrapleural pressure
D. Bronchoconstriction, decreased alveolar pressure, decreased intrapleural pressure
Correct Answer: B. Bronchoconstriction, increased alveolar pressure, increased
intrapleural pressure
Rationale: During forced expiration, contraction of abdominal muscles and internal
intercostals compresses the thoracic cavity, increasing intrapleural pressure (less
negative, even positive). This compresses airways (bronchoconstriction) and increases
alveolar pressure, driving air out. Bronchodilation occurs during inspiration, not forced
expiration.
Why Wrong:
A - Bronchodilation is incorrect; forced expiration causes airway compression, and
intrapleural pressure increases, not decreases.
C - Bronchodilation and decreased alveolar pressure are opposite of the events in
forced expiration.
D - Decreased intrapleural pressure is incorrect; it increases during forced expiration.
Reference: Marieb & Hoehn, Human Anatomy & Physiology, 11th ed., Ch. 22
Q2. A patient has a ventilation-perfusion (V/Q) ratio of 0.5. Which condition does this
most likely represent, and what is the primary compensatory response?
A. Dead space ventilation; compensatory increase in cardiac output
B. Shunt effect; compensatory hypoxic vasoconstriction in the affected region
C. Normal V/Q matching; no compensation needed
D. High V/Q ratio; compensatory bronchoconstriction
Correct Answer: B. Shunt effect; compensatory hypoxic vasoconstriction in the
affected region
Rationale: A V/Q ratio of 0.5 indicates low ventilation relative to perfusion, i.e., a
shunt-like effect where blood passes unoxygenated. The lung compensates by hypoxic
vasoconstriction in the affected area, redirecting blood to better-ventilated regions. Dead
space (high V/Q) would have a ratio >1, and normal is ~0.8-1.0.
Why Wrong:
A - Dead space ventilation corresponds to a high V/Q ratio, not low.
C - A ratio of 0.5 is not normal; it indicates a shunt effect.
D - High V/Q ratio is opposite; bronchoconstriction is not the primary response to low
V/Q.
Page 3
, Reference: West, Respiratory Physiology: The Essentials, 10th ed., Ch. 5
Q3. Which of the following best explains why the oxygen-hemoglobin dissociation
curve shifts to the right during exercise?
A. Increased pH and decreased temperature stabilize the T-state of hemoglobin
B. Increased 2,3-BPG and increased temperature decrease hemoglobin's affinity for
oxygen
C. Decreased carbon dioxide and increased pH promote oxygen binding
D. Increased partial pressure of oxygen in tissues causes a conformational change
Correct Answer: B. Increased 2,3-BPG and increased temperature decrease
hemoglobin's affinity for oxygen
Rationale: Exercise increases temperature, 2,3-BPG, and H+ (decreased pH), all of which
stabilize the T-state (low affinity) of hemoglobin, shifting the curve right. This enhances
oxygen unloading to active tissues. The other options describe left-shift conditions or
incorrect mechanisms.
Why Wrong:
A - Increased pH (alkalosis) shifts the curve left, not right, and stabilizes the R-state.
C - Decreased CO2 and increased pH shift the curve left, increasing affinity.
D - Increased PO2 in tissues is not the cause; the shift is due to metabolic byproducts.
Reference: Costanzo, Physiology, 6th ed., Ch. 5
Q4. In a patient with chronic obstructive pulmonary disease (COPD), which acid-base
disturbance is most likely, and what is the primary compensatory mechanism?
A. Respiratory acidosis with renal retention of bicarbonate
B. Respiratory alkalosis with renal excretion of bicarbonate
C. Metabolic acidosis with hyperventilation
D. Metabolic alkalosis with hypoventilation
Correct Answer: A. Respiratory acidosis with renal retention of bicarbonate
Rationale: COPD causes hypoventilation and CO2 retention, leading to respiratory
acidosis. Chronic compensation involves the kidneys increasing bicarbonate reabsorption
(and generating new bicarbonate) to buffer the acidosis. Respiratory alkalosis would
occur with hyperventilation, not COPD.
Why Wrong:
B - Respiratory alkalosis is due to hyperventilation, not COPD.
C - Metabolic acidosis is not primary in COPD; the primary issue is respiratory.
D - Metabolic alkalosis is not caused by COPD; hypoventilation would worsen
acidosis.
Reference: Porth, Pathophysiology, 10th ed., Ch. 9
Page 4
Learning) Module 5: The Respiratory System - Exam Review
| 2026/2027 Edition | 200 Verified Questions - 172 Questions
with Answers
BIOL 252 Module 5 Respiratory System Exam 2026-172 QUESTIONS AND ANSWERS ALREADY GRADED A+.
100% Verified Solutions | Updated Per Latest Guidelines | Graded A+
This comprehensive exam review for BIOL 252 Module 5 focuses on the respiratory system, covering
anatomy, physiology, and clinical correlations. With 200 verified questions and detailed rationales, it is
designed to reinforce key concepts and ensure exam readiness. Updated for the 2026/2027 academic
year, this guide aligns with Portage Learning's curriculum and grading standards. Ideal for students
aiming for a top score, it provides a thorough preparation tool.
Key Features:
Anatomy of the respiratory system: structures and functions
Physiology of respiration: ventilation, gas exchange, and transport
Regulation of breathing: neural and chemical controls
Clinical correlations: respiratory disorders and their implications
200 exam-style questions with answers and rationales
Updated content per 2026/2027 guidelines
Updates for 2026:
- Revised to reflect the latest Portage Learning curriculum updates
- Incorporated new clinical scenarios and case studies
- Enhanced rationales for deeper understanding
- Aligned with current A&P II exam standards
- Added more practice questions for comprehensive coverage
Abstract:
This exam review for BIOL 252 Module 5 provides a rigorous exploration of the respiratory system, emphasizing
structural and functional relationships. It covers the upper and lower respiratory tracts, pulmonary ventilation,
gas exchange in the alveoli, and oxygen and carbon dioxide transport in the blood. The neural and chemical
regulation of respiration is examined, including the roles of the respiratory centers and chemoreceptors. Clinical
correlations highlight common respiratory pathologies such as asthma, COPD, and pneumonia, linking
pathophysiology to symptoms and treatments. Each of the 200 questions is accompanied by a rationale that
explains the correct answer and distracts, facilitating active learning. This guide is an essential resource for
mastering the respiratory system and excelling in the BIOL 252 exam.
Keywords:
Respiratory system anatomy, Pulmonary ventilation, Gas exchange, Oxygen transport, Respiratory regulation,
Respiratory disorders, BIOL 252, Portage Learning
Answer Format:
Each question is presented in a multiple-choice format with four options. The correct answer is bolded, followed by
a detailed rationale explaining why it is correct and why the other options are incorrect. This format reinforces
understanding and aids in retention.
Compliance Checklist:
Aligned with Portage Learning BIOL 252 Module 5 objectives
Page 1
, Updated for the 2026/2027 academic year
200 verified questions with accurate answers
Rationales provided for every question
Suitable for self-assessment and exam preparation
Content Area Overview:
Content Area Questions Key Topics Weight
Anatomy of the Respiratory 1-40 Upper respiratory tract, Lower respiratory 20%
System tract, Lungs and pleura, Blood supply
Pulmonary Ventilation 41-80 Boyle's Law, Respiratory pressures, Lung 20%
compliance, Airway resistance
Gas Exchange and Transport 81-120 Alveolar gas exchange, Oxygen transport, 20%
Carbon dioxide transport,
Oxygen-hemoglobin dissociation curve
Regulation of Respiration 121-160 Respiratory centers, Chemoreceptors, 20%
Hering-Breuer reflex, Exercise and altitude
effects
Clinical Correlations and 161-200 Asthma, COPD, Pneumonia, Respiratory 20%
Disorders acidosis/alkalosis
Page 2
,Q1. During a forced expiration from total lung capacity, which sequence of events
occurs in the airways?
A. Bronchodilation, increased alveolar pressure, decreased intrapleural pressure
B. Bronchoconstriction, increased alveolar pressure, increased intrapleural pressure
C. Bronchodilation, decreased alveolar pressure, increased intrapleural pressure
D. Bronchoconstriction, decreased alveolar pressure, decreased intrapleural pressure
Correct Answer: B. Bronchoconstriction, increased alveolar pressure, increased
intrapleural pressure
Rationale: During forced expiration, contraction of abdominal muscles and internal
intercostals compresses the thoracic cavity, increasing intrapleural pressure (less
negative, even positive). This compresses airways (bronchoconstriction) and increases
alveolar pressure, driving air out. Bronchodilation occurs during inspiration, not forced
expiration.
Why Wrong:
A - Bronchodilation is incorrect; forced expiration causes airway compression, and
intrapleural pressure increases, not decreases.
C - Bronchodilation and decreased alveolar pressure are opposite of the events in
forced expiration.
D - Decreased intrapleural pressure is incorrect; it increases during forced expiration.
Reference: Marieb & Hoehn, Human Anatomy & Physiology, 11th ed., Ch. 22
Q2. A patient has a ventilation-perfusion (V/Q) ratio of 0.5. Which condition does this
most likely represent, and what is the primary compensatory response?
A. Dead space ventilation; compensatory increase in cardiac output
B. Shunt effect; compensatory hypoxic vasoconstriction in the affected region
C. Normal V/Q matching; no compensation needed
D. High V/Q ratio; compensatory bronchoconstriction
Correct Answer: B. Shunt effect; compensatory hypoxic vasoconstriction in the
affected region
Rationale: A V/Q ratio of 0.5 indicates low ventilation relative to perfusion, i.e., a
shunt-like effect where blood passes unoxygenated. The lung compensates by hypoxic
vasoconstriction in the affected area, redirecting blood to better-ventilated regions. Dead
space (high V/Q) would have a ratio >1, and normal is ~0.8-1.0.
Why Wrong:
A - Dead space ventilation corresponds to a high V/Q ratio, not low.
C - A ratio of 0.5 is not normal; it indicates a shunt effect.
D - High V/Q ratio is opposite; bronchoconstriction is not the primary response to low
V/Q.
Page 3
, Reference: West, Respiratory Physiology: The Essentials, 10th ed., Ch. 5
Q3. Which of the following best explains why the oxygen-hemoglobin dissociation
curve shifts to the right during exercise?
A. Increased pH and decreased temperature stabilize the T-state of hemoglobin
B. Increased 2,3-BPG and increased temperature decrease hemoglobin's affinity for
oxygen
C. Decreased carbon dioxide and increased pH promote oxygen binding
D. Increased partial pressure of oxygen in tissues causes a conformational change
Correct Answer: B. Increased 2,3-BPG and increased temperature decrease
hemoglobin's affinity for oxygen
Rationale: Exercise increases temperature, 2,3-BPG, and H+ (decreased pH), all of which
stabilize the T-state (low affinity) of hemoglobin, shifting the curve right. This enhances
oxygen unloading to active tissues. The other options describe left-shift conditions or
incorrect mechanisms.
Why Wrong:
A - Increased pH (alkalosis) shifts the curve left, not right, and stabilizes the R-state.
C - Decreased CO2 and increased pH shift the curve left, increasing affinity.
D - Increased PO2 in tissues is not the cause; the shift is due to metabolic byproducts.
Reference: Costanzo, Physiology, 6th ed., Ch. 5
Q4. In a patient with chronic obstructive pulmonary disease (COPD), which acid-base
disturbance is most likely, and what is the primary compensatory mechanism?
A. Respiratory acidosis with renal retention of bicarbonate
B. Respiratory alkalosis with renal excretion of bicarbonate
C. Metabolic acidosis with hyperventilation
D. Metabolic alkalosis with hypoventilation
Correct Answer: A. Respiratory acidosis with renal retention of bicarbonate
Rationale: COPD causes hypoventilation and CO2 retention, leading to respiratory
acidosis. Chronic compensation involves the kidneys increasing bicarbonate reabsorption
(and generating new bicarbonate) to buffer the acidosis. Respiratory alkalosis would
occur with hyperventilation, not COPD.
Why Wrong:
B - Respiratory alkalosis is due to hyperventilation, not COPD.
C - Metabolic acidosis is not primary in COPD; the primary issue is respiratory.
D - Metabolic alkalosis is not caused by COPD; hypoventilation would worsen
acidosis.
Reference: Porth, Pathophysiology, 10th ed., Ch. 9
Page 4
