WGU D115 OA UNIT 4 EXAM
QUESTIONS AND THEIR REVIEWED
CORRECT ANSWERS
An APRN nurse recalls that the acinus contains?
Acinus are the gas-exchange airways
They are made up of alveolar ducts, alveoli, and
bronchioles
J-receptors are what?
Sensitive to alterations in pulmonary capillary pressure
When stimulated they initiate rapid, shallow breathing
What does surfactant do?
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?
High pH (alkaline) and hypocapnia
Shift to the right would be low pH (acidic) and hypercapnia
What is the most common cause of hypoxemia?
V/Q mismatch
, Pt has pneumoconiosis. What info would the APRN
find in the hx of the pt?
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?
Exudative (inflammatory), proliferative, and fibrotic
Child has asthma. The APRN understands that which
pathophysiologic process occurs in this disease?
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?
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?
Inflammatory cytokines cause alveolar edema, which
creates a medium for microorganisms that lead to
consolidation
QUESTIONS AND THEIR REVIEWED
CORRECT ANSWERS
An APRN nurse recalls that the acinus contains?
Acinus are the gas-exchange airways
They are made up of alveolar ducts, alveoli, and
bronchioles
J-receptors are what?
Sensitive to alterations in pulmonary capillary pressure
When stimulated they initiate rapid, shallow breathing
What does surfactant do?
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?
High pH (alkaline) and hypocapnia
Shift to the right would be low pH (acidic) and hypercapnia
What is the most common cause of hypoxemia?
V/Q mismatch
, Pt has pneumoconiosis. What info would the APRN
find in the hx of the pt?
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?
Exudative (inflammatory), proliferative, and fibrotic
Child has asthma. The APRN understands that which
pathophysiologic process occurs in this disease?
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?
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?
Inflammatory cytokines cause alveolar edema, which
creates a medium for microorganisms that lead to
consolidation
