WGU D115 OA STUDY GUIDE UNIT 4 EXAM 2026 | ACTUAL
EXAM QUESTIONS WITH DETAILED ANSWERS WITH
RATIONALES AND A READINESS PRACTICE EXAM TEST
BANK WITH A STUDY GUIDE | LATEST UPDATED AND
VERIFIED FOR GUARANTEED PASS
An APRN nurse recalls that the acinus contains? - CORRECT ANSWER -Acinus are the gas-
exchange airways
They are made up of alveolar ducts, alveoli, and bronchioles
J-receptors are what? - CORRECT ANSWER -Sensitive to alterations in pulmonary capillary
pressure
When stimulated they initiate rapid, shallow breathing
What does surfactant do? - CORRECT ANSWER -Reduces surface tension
Produced by type 2 alveolar cells
Ultimately prevents lung collapse (alectasis)
Which conditions cause a shift to the left in the oxyhemoglobin dissociation curve? - CORRECT
ANSWER -High pH (alkaline) and hypocapnia
Shift to the right would be low pH (acidic) and hypercapnia
What is the most common cause of hypoxemia? - CORRECT ANSWER -V/Q mismatch
, Pt has pneumoconiosis. What info would the APRN find in the hx of the pt? - CORRECT
ANSWER -Inhaled inorganic dust particles, resulting in a change in the lung
Usually happens in the workplace. Long-term inhalation
Ex: coal, asbestos, silica, talc, mica, fiberglass
What are the phases of ALI/ARDS? - CORRECT ANSWER -Exudative (inflammatory),
proliferative, and fibrotic
Child has asthma. The APRN understands that which pathophysiologic process occurs in this
disease? - CORRECT ANSWER -Chronic inflammatory disorder that causes mucosal edema and
REVERSIBLE airflow obstruction
Causes bronchial hyperresponsiveness, constriction of airways
Episodic attacks
What is NOT a risk factor for COPD? - CORRECT ANSWER -Excessive alpha 1 antitripsyn
A decrease in this makes one susceptible to COPD
Other risk factors are air pollution, smoking, inhalation of occupational dusts
Pt has pneumococcal PNA. Which pathophysiologic process has occurred? - CORRECT
ANSWER -Inflammatory cytokines cause alveolar edema, which creates a medium for
microorganisms that lead to consolidation
EXAM QUESTIONS WITH DETAILED ANSWERS WITH
RATIONALES AND A READINESS PRACTICE EXAM TEST
BANK WITH A STUDY GUIDE | LATEST UPDATED AND
VERIFIED FOR GUARANTEED PASS
An APRN nurse recalls that the acinus contains? - CORRECT ANSWER -Acinus are the gas-
exchange airways
They are made up of alveolar ducts, alveoli, and bronchioles
J-receptors are what? - CORRECT ANSWER -Sensitive to alterations in pulmonary capillary
pressure
When stimulated they initiate rapid, shallow breathing
What does surfactant do? - CORRECT ANSWER -Reduces surface tension
Produced by type 2 alveolar cells
Ultimately prevents lung collapse (alectasis)
Which conditions cause a shift to the left in the oxyhemoglobin dissociation curve? - CORRECT
ANSWER -High pH (alkaline) and hypocapnia
Shift to the right would be low pH (acidic) and hypercapnia
What is the most common cause of hypoxemia? - CORRECT ANSWER -V/Q mismatch
, Pt has pneumoconiosis. What info would the APRN find in the hx of the pt? - CORRECT
ANSWER -Inhaled inorganic dust particles, resulting in a change in the lung
Usually happens in the workplace. Long-term inhalation
Ex: coal, asbestos, silica, talc, mica, fiberglass
What are the phases of ALI/ARDS? - CORRECT ANSWER -Exudative (inflammatory),
proliferative, and fibrotic
Child has asthma. The APRN understands that which pathophysiologic process occurs in this
disease? - CORRECT ANSWER -Chronic inflammatory disorder that causes mucosal edema and
REVERSIBLE airflow obstruction
Causes bronchial hyperresponsiveness, constriction of airways
Episodic attacks
What is NOT a risk factor for COPD? - CORRECT ANSWER -Excessive alpha 1 antitripsyn
A decrease in this makes one susceptible to COPD
Other risk factors are air pollution, smoking, inhalation of occupational dusts
Pt has pneumococcal PNA. Which pathophysiologic process has occurred? - CORRECT
ANSWER -Inflammatory cytokines cause alveolar edema, which creates a medium for
microorganisms that lead to consolidation
