WGU D236 OBJECTIVE ASSESSMENT EXAM / ACTUAL WGU D236
PATHOPHYSIOLOGY OBJECTIVE ASSESSMENT EXAM TEST BANK 2026/2027
PRACTICE QUESTIONS AND STUDY GUIDE ACCURATE EXAM COMPLETE
REAL QUESTIONS WITH WELL ELABORATED SOLUTIONS AND DETAILED
RATIONALES (100% CORRECT VERIFIED ANSWERS) CURRENTLY UPDATED
VERSION 2026 EDITION |FULL REVISED WGU D236 PATHOPHYSIOLOGY
OBJECTIVE ASSESSMENT APPROVED EXAM |JUST RELEASED
1. A 55-year-old male with a 30-year history of smoking is examined
for respiratory disturbance. Examination of his bronchial airway
reveals that stratified squamous epithelial cells have replaced the
normal columnar ciliated cells. This type of cellular adaptation is
called:
A) Hyperplasia
B) Dysplasia
C) Metaplasia
D) Anaplasia
Rationale: Metaplasia is the reversible replacement of one differentiated
cell type with another. In smokers, the normal pseudostratified ciliated
columnar epithelium of the bronchi is replaced by stratified squamous
epithelium as an adaptive response to chronic irritation. This change is
protective against the irritants but results in loss of ciliary function,
impairing mucus clearance.
2. A patient presents with crushing chest pain that radiates to the
back and jaw, along with fatigue, shortness of breath, and vomiting.
,Laboratory findings show elevated cardiac enzymes. This
presentation is most consistent with:
A) Stable angina
B) Myocardial infarction (Type 2)
C) Pericarditis
D) Mitral valve insufficiency
Rationale: Type 2 myocardial infarction occurs due to a mismatch
between oxygen supply and demand, often in the setting of severe anemia,
hypotension, or hypertension. The classic presentation includes crushing
chest pain radiating to the jaw and back, along with elevated cardiac
enzymes (troponin, CK-MB).
3. Which of the following is a pulmonary cause of respiratory
acidosis?
A) Hyperventilation
B) Cystic fibrosis
C) Fever
D) Anxiety
Rationale: Respiratory acidosis results from hypoventilation leading to
CO₂ retention. Pulmonary causes include cystic fibrosis, chronic
obstructive pulmonary disease (COPD), asthma, and hypoventilation
,syndromes. Hyperventilation, fever, and anxiety typically cause
respiratory alkalosis.
4. A patient with acidosis would demonstrate which change in the
oxyhemoglobin dissociation curve?
A) Shift to the right, causing more oxygen to be released to the cells
B) Shift to the left, allowing less oxygen to be released to the cells
C) No change
D) Variable fluctuation
Rationale: Acidosis (decreased pH) causes the oxyhemoglobin dissociation
curve to shift to the right (Bohr effect). This decreases hemoglobin's
affinity for oxygen, promoting oxygen release to tissues. This is a
compensatory mechanism that enhances oxygen delivery during metabolic
stress.
5. The renin-angiotensin-aldosterone system (RAAS) is activated in
response to:
A) Increased blood pressure
B) Reduced renal blood flow
C) Increased sodium levels
D) Decreased potassium levels
, Rationale: Reduced blood flow to the kidneys causes the release of renin,
which converts angiotensinogen to angiotensin I. Angiotensin I is then
converted to angiotensin II, causing vasoconstriction and stimulating
aldosterone release. Aldosterone promotes sodium and water retention,
increasing blood volume and pressure.
6. In diabetic ketoacidosis (DKA), which laboratory finding is
expected?
A) Decreased anion gap
B) Increased anion gap, decreased HCO₃⁻
C) Normal anion gap, increased HCO₃⁻
D) Decreased anion gap, increased HCO₃⁻
Rationale: DKA is characterized by an increased anion gap metabolic
acidosis due to the accumulation of ketone bodies (acetoacetate and beta-
hydroxybutyrate). The bicarbonate (HCO₃⁻) level is decreased as it is
consumed buffering the excess acids.
7. How do the kidneys compensate for alkalosis?
A) Excrete H⁺ and retain HCO₃⁻
B) Retain H⁺ and excrete HCO₃⁻
C) Retain both H⁺ and HCO₃⁻
D) Excrete both H⁺ and HCO₃⁻
PATHOPHYSIOLOGY OBJECTIVE ASSESSMENT EXAM TEST BANK 2026/2027
PRACTICE QUESTIONS AND STUDY GUIDE ACCURATE EXAM COMPLETE
REAL QUESTIONS WITH WELL ELABORATED SOLUTIONS AND DETAILED
RATIONALES (100% CORRECT VERIFIED ANSWERS) CURRENTLY UPDATED
VERSION 2026 EDITION |FULL REVISED WGU D236 PATHOPHYSIOLOGY
OBJECTIVE ASSESSMENT APPROVED EXAM |JUST RELEASED
1. A 55-year-old male with a 30-year history of smoking is examined
for respiratory disturbance. Examination of his bronchial airway
reveals that stratified squamous epithelial cells have replaced the
normal columnar ciliated cells. This type of cellular adaptation is
called:
A) Hyperplasia
B) Dysplasia
C) Metaplasia
D) Anaplasia
Rationale: Metaplasia is the reversible replacement of one differentiated
cell type with another. In smokers, the normal pseudostratified ciliated
columnar epithelium of the bronchi is replaced by stratified squamous
epithelium as an adaptive response to chronic irritation. This change is
protective against the irritants but results in loss of ciliary function,
impairing mucus clearance.
2. A patient presents with crushing chest pain that radiates to the
back and jaw, along with fatigue, shortness of breath, and vomiting.
,Laboratory findings show elevated cardiac enzymes. This
presentation is most consistent with:
A) Stable angina
B) Myocardial infarction (Type 2)
C) Pericarditis
D) Mitral valve insufficiency
Rationale: Type 2 myocardial infarction occurs due to a mismatch
between oxygen supply and demand, often in the setting of severe anemia,
hypotension, or hypertension. The classic presentation includes crushing
chest pain radiating to the jaw and back, along with elevated cardiac
enzymes (troponin, CK-MB).
3. Which of the following is a pulmonary cause of respiratory
acidosis?
A) Hyperventilation
B) Cystic fibrosis
C) Fever
D) Anxiety
Rationale: Respiratory acidosis results from hypoventilation leading to
CO₂ retention. Pulmonary causes include cystic fibrosis, chronic
obstructive pulmonary disease (COPD), asthma, and hypoventilation
,syndromes. Hyperventilation, fever, and anxiety typically cause
respiratory alkalosis.
4. A patient with acidosis would demonstrate which change in the
oxyhemoglobin dissociation curve?
A) Shift to the right, causing more oxygen to be released to the cells
B) Shift to the left, allowing less oxygen to be released to the cells
C) No change
D) Variable fluctuation
Rationale: Acidosis (decreased pH) causes the oxyhemoglobin dissociation
curve to shift to the right (Bohr effect). This decreases hemoglobin's
affinity for oxygen, promoting oxygen release to tissues. This is a
compensatory mechanism that enhances oxygen delivery during metabolic
stress.
5. The renin-angiotensin-aldosterone system (RAAS) is activated in
response to:
A) Increased blood pressure
B) Reduced renal blood flow
C) Increased sodium levels
D) Decreased potassium levels
, Rationale: Reduced blood flow to the kidneys causes the release of renin,
which converts angiotensinogen to angiotensin I. Angiotensin I is then
converted to angiotensin II, causing vasoconstriction and stimulating
aldosterone release. Aldosterone promotes sodium and water retention,
increasing blood volume and pressure.
6. In diabetic ketoacidosis (DKA), which laboratory finding is
expected?
A) Decreased anion gap
B) Increased anion gap, decreased HCO₃⁻
C) Normal anion gap, increased HCO₃⁻
D) Decreased anion gap, increased HCO₃⁻
Rationale: DKA is characterized by an increased anion gap metabolic
acidosis due to the accumulation of ketone bodies (acetoacetate and beta-
hydroxybutyrate). The bicarbonate (HCO₃⁻) level is decreased as it is
consumed buffering the excess acids.
7. How do the kidneys compensate for alkalosis?
A) Excrete H⁺ and retain HCO₃⁻
B) Retain H⁺ and excrete HCO₃⁻
C) Retain both H⁺ and HCO₃⁻
D) Excrete both H⁺ and HCO₃⁻
