NUR 555 ADVANCED CLINICAL
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
AND ANSWERS
1. Which cellular adaptation is characterized by the replacement of one mature cell type by
another, often as a response to chronic irritation?
A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Answer: C
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
by another, such as the change from ciliated columnar epithelium to squamous epithelium
in the airways of smokers.
2. In the context of ischemia-reperfusion injury, what is the primary mechanism of additional
damage once oxygen is restored?
A. Excessive ATP production
,B. Stabilization of the mitochondrial membrane
C. Decrease in intracellular calcium levels
D. Generation of reactive oxygen species (ROS)
Answer: D
Conceptual Explanation: Reperfusion injury occurs when oxygen restoration leads to the
formation of free radicals and reactive oxygen species that cause further membrane
damage and calcium overload.
3. Which mediator of inflammation is responsible for inducing pain and is derived from
arachidonic acid via the cyclooxygenase pathway?
A. Histamine
B. Prostaglandins
C. Leukotrienes
D. Cytokines
Answer: B
Conceptual Explanation: Prostaglandins are produced through the COX pathway and are
key mediators of pain and fever during the inflammatory response.
4. In Type I Hypersensitivity reactions, which antibody isotype binds to the surface of mast
cells?
A. IgE
, B. IgM
C. IgA
D. IgG
Answer: A
Conceptual Explanation: Type I hypersensitivity is IgE-mediated, where IgE binds to Fc
receptors on mast cells, leading to degranulation upon allergen exposure.
5. A patient with chronic renal failure presents with secondary hyperparathyroidism. What is
the underlying pathophysiological cause?
A. Hypercalcemia inhibiting PTH
B. Hypophosphatemia
C. Excessive production of calcitonin
D. Hyperphosphatemia and vitamin D deficiency
Answer: D
Conceptual Explanation: In renal failure, phosphorus retention and decreased activation
of vitamin D lead to hypocalcemia, which chronically stimulates the parathyroid glands to
produce PTH.
6. Which type of shock is characterized by high cardiac output and low systemic vascular
resistance (SVR)?
A. Hypovolemic shock
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
AND ANSWERS
1. Which cellular adaptation is characterized by the replacement of one mature cell type by
another, often as a response to chronic irritation?
A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Answer: C
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
by another, such as the change from ciliated columnar epithelium to squamous epithelium
in the airways of smokers.
2. In the context of ischemia-reperfusion injury, what is the primary mechanism of additional
damage once oxygen is restored?
A. Excessive ATP production
,B. Stabilization of the mitochondrial membrane
C. Decrease in intracellular calcium levels
D. Generation of reactive oxygen species (ROS)
Answer: D
Conceptual Explanation: Reperfusion injury occurs when oxygen restoration leads to the
formation of free radicals and reactive oxygen species that cause further membrane
damage and calcium overload.
3. Which mediator of inflammation is responsible for inducing pain and is derived from
arachidonic acid via the cyclooxygenase pathway?
A. Histamine
B. Prostaglandins
C. Leukotrienes
D. Cytokines
Answer: B
Conceptual Explanation: Prostaglandins are produced through the COX pathway and are
key mediators of pain and fever during the inflammatory response.
4. In Type I Hypersensitivity reactions, which antibody isotype binds to the surface of mast
cells?
A. IgE
, B. IgM
C. IgA
D. IgG
Answer: A
Conceptual Explanation: Type I hypersensitivity is IgE-mediated, where IgE binds to Fc
receptors on mast cells, leading to degranulation upon allergen exposure.
5. A patient with chronic renal failure presents with secondary hyperparathyroidism. What is
the underlying pathophysiological cause?
A. Hypercalcemia inhibiting PTH
B. Hypophosphatemia
C. Excessive production of calcitonin
D. Hyperphosphatemia and vitamin D deficiency
Answer: D
Conceptual Explanation: In renal failure, phosphorus retention and decreased activation
of vitamin D lead to hypocalcemia, which chronically stimulates the parathyroid glands to
produce PTH.
6. Which type of shock is characterized by high cardiac output and low systemic vascular
resistance (SVR)?
A. Hypovolemic shock
