NUR 555 QUIZ 6 RESPIRATORY SYSTEM
QUESTIONS AND CORRECT ANSWERS PLUS
RATIONALE NEW UPDATE 2026-2027 SNHU
98 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Analyze arterial blood gas and pulmonary function data to differentiate respiratory failure phenotypes and
guide management
2 Apply current evidence-based guidelines to select and prioritize pharmacologic and non-pharmacologic
therapies for obstructive and restrictive lung diseases
3 Evaluate mechanical ventilation parameters and patient-ventilator interaction to optimize oxygenation,
ventilation, and lung-protective strategies
4 NUR 555 Quiz 6 Respiratory System Questions and Correct Answers plus Rationale New Update 2026
5 2027 SNHU
6 Foundations of Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic
Management
7 Applied Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic Management
8 Advanced Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic
Management
9 Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic Management Review
ABSTRACT
This study document brings together 98 carefully worded exam questions drawn from NUR 555
Quiz 6 Respiratory System Questions and Correct Answers plus Rationale New Update 2026-2027
SNHU, with the strongest emphasis placed on Analyze arterial blood gas and pulmonary function
data to differentiate respiratory failure phenotypes and guide management, Apply current
evidence-based guidelines to select and prioritize pharmacologic and non-pharmacologic therapies
for obstructive and restrictive lung diseases, Evaluate mechanical ventilation parameters and
patient-ventilator interaction to optimize oxygenation, ventilation and and lung-protective strategies.
Every item follows the wording style and level of reasoning you meet in the real paper, and each
one is paired with a clear rationale so the correct choice is never a guess. Work through the set at
your own pace, mark the questions that slow you down, then come back to them until the
reasoning feels automatic. Learners who revise this way walk into the exam room recognising the
pattern behind the questions instead of meeting them for the first time. Keep going - steady, honest
practice is what turns a difficult paper into a comfortable pass.
Page 1
,Q1 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
Which statement best explains why a patient with severe acute respiratory distress
syndrome (ARDS) may exhibit a normal or low PaCO2 despite profound
hypoxemia?
A. Increased dead space ventilation due to microthrombi in the pulmonary vasculature
B. Compensatory hyperventilation driven by hypoxemic stimulation of peripheral chemoreceptors
CORRECT
C. Metabolic alkalosis causing compensatory respiratory depression
D. Reduced alveolar compliance leading to decreased minute ventilation
RATIONALE: In early ARDS, hypoxemia stimulates peripheral chemoreceptors, causing
hyperventilation and a low or normal PaCO2 (respiratory alkalosis). Increased dead space and
reduced compliance would tend to raise PaCO2, not lower it. Metabolic alkalosis would cause
compensatory hypoventilation, not hyperventilation.
Q2 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
A patient with asthma is prescribed a new inhaler. Which instruction is most
critical to ensure effective drug delivery and reduce local adverse effects?
A. Use a spacer device with a metered-dose inhaler and rinse the mouth after inhalation
CORRECT
B. Inhale rapidly and deeply immediately after actuating the inhaler
C. Take the medication immediately before meals to enhance absorption
D. Exhale fully into the inhaler before actuation to prime the device
RATIONALE: Using a spacer improves lung deposition and reduces oropharyngeal candidiasis,
especially with inhaled corticosteroids; rinsing the mouth further minimizes local fungal infections.
Rapid inhalation may cause impaction in the oropharynx, and exhaling into the inhaler can clog
the device. Timing with meals does not affect delivery.
Page 2
,Q3 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
Which intervention is most likely to reduce the risk of ventilator-induced lung
injury in a patient with ARDS?
A. Using a tidal volume of 12 mL/kg predicted body weight to maintain normal PaCO2
B. Applying high levels of positive end-expiratory pressure (PEEP) without considering plateau
pressure
C. Limiting plateau pressure to 30 cm H2O and using tidal volumes of 4-6 mL/kg predicted body
weight CORRECT
D. Maintaining the patient in a supine position to optimize ventilation-perfusion matching
RATIONALE: Lung-protective ventilation with low tidal volumes (4-6 mL/kg PBW) and plateau
pressure 30 cm H2O reduces volutrauma and barotrauma and improves survival in ARDS. High
tidal volumes and unchecked high PEEP increase injury risk. Prone positioning, not supine,
improves outcomes in moderate-severe ARDS.
Q4 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
A patient with a history of obstructive sleep apnea (OSA) is being evaluated for
daytime sleepiness. Which pathophysiologic mechanism best explains the
cardiovascular consequences of untreated OSA?
A. Chronic intermittent hypoxia and reoxygenation causing sympathetic activation and
endothelial dysfunction CORRECT
B. Sustained hypercapnia leading to systemic vasodilation and hypotension
C. Increased intrathoracic pressure causing enhanced venous return and preload
D. Chronic respiratory alkalosis resulting in decreased sympathetic outflow
RATIONALE: Untreated OSA causes repetitive episodes of hypoxia and reoxygenation, which
increase sympathetic activity, oxidative stress, and endothelial dysfunction, contributing to
hypertension and cardiovascular disease. Hypercapnia and alkalosis are not the primary
mechanisms. Increased intrathoracic pressure actually reduces venous return.
Page 3
, Q5 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
A patient with a suspected pulmonary embolism undergoes CT pulmonary
angiography. Which finding on the CT scan is most specific for pulmonary
embolism?
A. Bilateral pleural effusions
B. Filling defect in the pulmonary artery CORRECT
C. Ground-glass opacities in the lower lobes
D. Enlarged mediastinal lymph nodes
RATIONALE: A filling defect in the pulmonary artery on CT pulmonary angiography is the
hallmark finding of pulmonary embolism. Pleural effusions, ground-glass opacities, and
lymphadenopathy are nonspecific and can be seen in various conditions. Therefore, the filling
defect is the most specific indicator.
Q6 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
Which assessment finding is most indicative of impending respiratory failure in a
patient with myasthenia gravis?
A. Decreased deep tendon reflexes
B. Increased oxygen saturation on room air
C. Single-breath count less than 20
D. Use of accessory muscles and paradoxical abdominal movement CORRECT
RATIONALE: In neuromuscular respiratory failure, accessory muscle use and paradoxical
abdominal movement (inward movement during inspiration) indicate diaphragmatic weakness
and impending failure. A single-breath count less than 20 is a late sign; decreased reflexes are
not specific. Increased oxygen saturation does not reflect ventilatory failure.
Page 4
QUESTIONS AND CORRECT ANSWERS PLUS
RATIONALE NEW UPDATE 2026-2027 SNHU
98 QUESTIONS
TABLE OF CONTENTS
# TOPIC
1 Analyze arterial blood gas and pulmonary function data to differentiate respiratory failure phenotypes and
guide management
2 Apply current evidence-based guidelines to select and prioritize pharmacologic and non-pharmacologic
therapies for obstructive and restrictive lung diseases
3 Evaluate mechanical ventilation parameters and patient-ventilator interaction to optimize oxygenation,
ventilation, and lung-protective strategies
4 NUR 555 Quiz 6 Respiratory System Questions and Correct Answers plus Rationale New Update 2026
5 2027 SNHU
6 Foundations of Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic
Management
7 Applied Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic Management
8 Advanced Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic
Management
9 Respiratory System: Advanced Pathophysiology, Assessment, and Pharmacologic Management Review
ABSTRACT
This study document brings together 98 carefully worded exam questions drawn from NUR 555
Quiz 6 Respiratory System Questions and Correct Answers plus Rationale New Update 2026-2027
SNHU, with the strongest emphasis placed on Analyze arterial blood gas and pulmonary function
data to differentiate respiratory failure phenotypes and guide management, Apply current
evidence-based guidelines to select and prioritize pharmacologic and non-pharmacologic therapies
for obstructive and restrictive lung diseases, Evaluate mechanical ventilation parameters and
patient-ventilator interaction to optimize oxygenation, ventilation and and lung-protective strategies.
Every item follows the wording style and level of reasoning you meet in the real paper, and each
one is paired with a clear rationale so the correct choice is never a guess. Work through the set at
your own pace, mark the questions that slow you down, then come back to them until the
reasoning feels automatic. Learners who revise this way walk into the exam room recognising the
pattern behind the questions instead of meeting them for the first time. Keep going - steady, honest
practice is what turns a difficult paper into a comfortable pass.
Page 1
,Q1 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
Which statement best explains why a patient with severe acute respiratory distress
syndrome (ARDS) may exhibit a normal or low PaCO2 despite profound
hypoxemia?
A. Increased dead space ventilation due to microthrombi in the pulmonary vasculature
B. Compensatory hyperventilation driven by hypoxemic stimulation of peripheral chemoreceptors
CORRECT
C. Metabolic alkalosis causing compensatory respiratory depression
D. Reduced alveolar compliance leading to decreased minute ventilation
RATIONALE: In early ARDS, hypoxemia stimulates peripheral chemoreceptors, causing
hyperventilation and a low or normal PaCO2 (respiratory alkalosis). Increased dead space and
reduced compliance would tend to raise PaCO2, not lower it. Metabolic alkalosis would cause
compensatory hypoventilation, not hyperventilation.
Q2 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
A patient with asthma is prescribed a new inhaler. Which instruction is most
critical to ensure effective drug delivery and reduce local adverse effects?
A. Use a spacer device with a metered-dose inhaler and rinse the mouth after inhalation
CORRECT
B. Inhale rapidly and deeply immediately after actuating the inhaler
C. Take the medication immediately before meals to enhance absorption
D. Exhale fully into the inhaler before actuation to prime the device
RATIONALE: Using a spacer improves lung deposition and reduces oropharyngeal candidiasis,
especially with inhaled corticosteroids; rinsing the mouth further minimizes local fungal infections.
Rapid inhalation may cause impaction in the oropharynx, and exhaling into the inhaler can clog
the device. Timing with meals does not affect delivery.
Page 2
,Q3 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
Which intervention is most likely to reduce the risk of ventilator-induced lung
injury in a patient with ARDS?
A. Using a tidal volume of 12 mL/kg predicted body weight to maintain normal PaCO2
B. Applying high levels of positive end-expiratory pressure (PEEP) without considering plateau
pressure
C. Limiting plateau pressure to 30 cm H2O and using tidal volumes of 4-6 mL/kg predicted body
weight CORRECT
D. Maintaining the patient in a supine position to optimize ventilation-perfusion matching
RATIONALE: Lung-protective ventilation with low tidal volumes (4-6 mL/kg PBW) and plateau
pressure 30 cm H2O reduces volutrauma and barotrauma and improves survival in ARDS. High
tidal volumes and unchecked high PEEP increase injury risk. Prone positioning, not supine,
improves outcomes in moderate-severe ARDS.
Q4 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
A patient with a history of obstructive sleep apnea (OSA) is being evaluated for
daytime sleepiness. Which pathophysiologic mechanism best explains the
cardiovascular consequences of untreated OSA?
A. Chronic intermittent hypoxia and reoxygenation causing sympathetic activation and
endothelial dysfunction CORRECT
B. Sustained hypercapnia leading to systemic vasodilation and hypotension
C. Increased intrathoracic pressure causing enhanced venous return and preload
D. Chronic respiratory alkalosis resulting in decreased sympathetic outflow
RATIONALE: Untreated OSA causes repetitive episodes of hypoxia and reoxygenation, which
increase sympathetic activity, oxidative stress, and endothelial dysfunction, contributing to
hypertension and cardiovascular disease. Hypercapnia and alkalosis are not the primary
mechanisms. Increased intrathoracic pressure actually reduces venous return.
Page 3
, Q5 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
A patient with a suspected pulmonary embolism undergoes CT pulmonary
angiography. Which finding on the CT scan is most specific for pulmonary
embolism?
A. Bilateral pleural effusions
B. Filling defect in the pulmonary artery CORRECT
C. Ground-glass opacities in the lower lobes
D. Enlarged mediastinal lymph nodes
RATIONALE: A filling defect in the pulmonary artery on CT pulmonary angiography is the
hallmark finding of pulmonary embolism. Pleural effusions, ground-glass opacities, and
lymphadenopathy are nonspecific and can be seen in various conditions. Therefore, the filling
defect is the most specific indicator.
Q6 ANALYZE ARTERIAL BLOOD GAS AND PULMONARY FUNCTION DATA TO
DIFFERENTIATE RESPIRATORY FAILURE PHENOTYPES AND GUIDE MANAGEMENT
Which assessment finding is most indicative of impending respiratory failure in a
patient with myasthenia gravis?
A. Decreased deep tendon reflexes
B. Increased oxygen saturation on room air
C. Single-breath count less than 20
D. Use of accessory muscles and paradoxical abdominal movement CORRECT
RATIONALE: In neuromuscular respiratory failure, accessory muscle use and paradoxical
abdominal movement (inward movement during inspiration) indicate diaphragmatic weakness
and impending failure. A single-breath count less than 20 is a late sign; decreased reflexes are
not specific. Increased oxygen saturation does not reflect ventilatory failure.
Page 4
