NUR 502 Exam 1: Advanced Pathophysiology -
St. Thomas University Updated and Latest
Questions and Correct Answers with Rationale
1. A 55-year-old male with chronic hypertension exhibits thickening of the left ventricular
wall. Which cellular adaptation is most likely occurring?
A. Atrophy
B. Hyperplasia
C. Metaplasia
D. Hypertrophy
Correct Answer: D
Rationale: Hypertrophy is defined as an increase in the size of individual cells, which leads
to an increase in the overall size of the organ. In the case of chronic hypertension, the heart
muscle must work harder to pump blood against increased resistance, leading to cellular
growth. This process differs from hyperplasia, which involves an increase in the number of
cells through division. Pathologic hypertrophy in the heart can eventually lead to heart
failure if the workload is not reduced. Understanding this adaptation is crucial for clinicians
monitoring cardiac remodeling in hypertensive patients.
2. Which process describes the replacement of one mature cell type by another, less
differentiated cell type in response to chronic irritation?
A. Neoplasia
B. Dysplasia
C. Anaplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is a reversible change where one adult cell type is replaced by
another to better withstand environmental stress. A classic example is the change of
ciliated columnar epithelium to stratified squamous epithelium in the airways of smokers.
While this provides a more rugged lining, it results in the loss of critical protective
functions like mucus secretion. If the irritating stimulus is removed, the tissue can revert to
its original state. However, persistent metaplasia can serve as a precursor to more severe
dysplastic changes.
3. A biopsy of the cervix reveals cells that vary in size and shape with large, darkly stained
nuclei. This condition is best described as:
A. Physiologic hyperplasia
,B. Metaplasia
C. Dysplasia
D. Atrophy
Correct Answer: C
Rationale: Dysplasia refers to abnormal changes in the size, shape, and organization of
mature cells within a tissue. It is often considered an atypical hyperplasia and is frequently
found adjacent to cancerous cells. Unlike metaplasia, dysplasia does not involve a simple
cell-type swap but rather a disorganized growth pattern. Clinically, it is often identified
during screening tests like Pap smears to detect pre-cancerous lesions. Early detection of
dysplastic changes is vital for the prevention of invasive carcinomas.
4. Hypoxic injury results in cellular swelling primarily because of which mechanism?
A. Increased intracellular potassium
B. Decreased intracellular sodium
C. Failure of the Na+/K+ ATPase pump
D. Activation of the complement system
Correct Answer: C
Rationale: Hypoxia leads to a decrease in mitochondrial ATP production, which is
necessary for the Na+/K+ ATPase pump to function. When the pump fails, sodium
accumulates inside the cell, creating an osmotic gradient that pulls water inward. This
influx of water causes the cell and its organelles, such as the endoplasmic reticulum, to
swell significantly. This condition, known as oncosis or hydropic degeneration, is a
hallmark of early reversible cell injury. If ATP levels are not restored, the persistent
swelling can lead to irreversible membrane damage and cell death.
5. During ischemia-reperfusion injury, the sudden burst of oxygen results in the formation of
which damaging molecules?
A. Glutathione
B. Lactic acid
C. Amino acids
D. Free radicals
Correct Answer: D
Rationale: Reperfusion injury occurs when blood flow is restored to ischemic tissues,
leading to the generation of reactive oxygen species (ROS). These free radicals are unstable
molecules that can cause oxidative stress by damaging DNA, proteins, and lipid
membranes. The sudden influx of oxygen overwhelms the cell’s antioxidant defenses, such
, as glutathione. This process is particularly relevant in clinical scenarios like myocardial
infarction or stroke treatments. Clinicians must be aware that while restoring blood flow is
necessary, it can paradoxicaly cause additional cellular damage.
6. Which type of necrosis is characterized by the conversion of tissue into a proteinaceous,
firm, and opaque state, typically seen in the heart or kidneys?
A. Liquefactive necrosis
B. Caseous necrosis
C. Fat necrosis
D. Coagulative necrosis
Correct Answer: D
Rationale: Coagulative necrosis primarily occurs as a result of protein denaturation,
causing the albumin to transform into a firm, opaque state. It is most commonly associated
with hypoxic injury resulting from infarction in organs like the heart and kidneys. The
structural framework of the tissue is maintained for several days after cell death, giving it a
characteristic ‘ghost-like’ appearance under a microscope. This type of necrosis contrasts
with liquefactive necrosis, where tissues become soft and liquid. Recognizing these
patterns helps pathologists identify the underlying cause of tissue death during autopsy or
biopsy.
7. Liquefactive necrosis is most commonly associated with ischemic injury to which organ?
A. Spleen
B. Liver
C. Heart
D. Brain
Correct Answer: D
Rationale: Liquefactive necrosis occurs in the brain because neurons and glial cells contain
high levels of digestive enzymes and lipids. When brain cells die, these hydrolases dissolve
the tissue, turning it into a soft, liquid mass. This process is often triggered by bacterial
infections or ischemic strokes within the central nervous system. Because the brain lacks a
strong connective tissue framework, the necrotic area eventually forms a cyst or fluid-filled
cavity. Understanding this helps explain why brain infarcts lead to permanent structural
defects and loss of function.
8. Which of the following describes programmed cell death that is a normal part of
development and tissue homeostasis?
A. Apoptosis
B. Necrosis
St. Thomas University Updated and Latest
Questions and Correct Answers with Rationale
1. A 55-year-old male with chronic hypertension exhibits thickening of the left ventricular
wall. Which cellular adaptation is most likely occurring?
A. Atrophy
B. Hyperplasia
C. Metaplasia
D. Hypertrophy
Correct Answer: D
Rationale: Hypertrophy is defined as an increase in the size of individual cells, which leads
to an increase in the overall size of the organ. In the case of chronic hypertension, the heart
muscle must work harder to pump blood against increased resistance, leading to cellular
growth. This process differs from hyperplasia, which involves an increase in the number of
cells through division. Pathologic hypertrophy in the heart can eventually lead to heart
failure if the workload is not reduced. Understanding this adaptation is crucial for clinicians
monitoring cardiac remodeling in hypertensive patients.
2. Which process describes the replacement of one mature cell type by another, less
differentiated cell type in response to chronic irritation?
A. Neoplasia
B. Dysplasia
C. Anaplasia
D. Metaplasia
Correct Answer: D
Rationale: Metaplasia is a reversible change where one adult cell type is replaced by
another to better withstand environmental stress. A classic example is the change of
ciliated columnar epithelium to stratified squamous epithelium in the airways of smokers.
While this provides a more rugged lining, it results in the loss of critical protective
functions like mucus secretion. If the irritating stimulus is removed, the tissue can revert to
its original state. However, persistent metaplasia can serve as a precursor to more severe
dysplastic changes.
3. A biopsy of the cervix reveals cells that vary in size and shape with large, darkly stained
nuclei. This condition is best described as:
A. Physiologic hyperplasia
,B. Metaplasia
C. Dysplasia
D. Atrophy
Correct Answer: C
Rationale: Dysplasia refers to abnormal changes in the size, shape, and organization of
mature cells within a tissue. It is often considered an atypical hyperplasia and is frequently
found adjacent to cancerous cells. Unlike metaplasia, dysplasia does not involve a simple
cell-type swap but rather a disorganized growth pattern. Clinically, it is often identified
during screening tests like Pap smears to detect pre-cancerous lesions. Early detection of
dysplastic changes is vital for the prevention of invasive carcinomas.
4. Hypoxic injury results in cellular swelling primarily because of which mechanism?
A. Increased intracellular potassium
B. Decreased intracellular sodium
C. Failure of the Na+/K+ ATPase pump
D. Activation of the complement system
Correct Answer: C
Rationale: Hypoxia leads to a decrease in mitochondrial ATP production, which is
necessary for the Na+/K+ ATPase pump to function. When the pump fails, sodium
accumulates inside the cell, creating an osmotic gradient that pulls water inward. This
influx of water causes the cell and its organelles, such as the endoplasmic reticulum, to
swell significantly. This condition, known as oncosis or hydropic degeneration, is a
hallmark of early reversible cell injury. If ATP levels are not restored, the persistent
swelling can lead to irreversible membrane damage and cell death.
5. During ischemia-reperfusion injury, the sudden burst of oxygen results in the formation of
which damaging molecules?
A. Glutathione
B. Lactic acid
C. Amino acids
D. Free radicals
Correct Answer: D
Rationale: Reperfusion injury occurs when blood flow is restored to ischemic tissues,
leading to the generation of reactive oxygen species (ROS). These free radicals are unstable
molecules that can cause oxidative stress by damaging DNA, proteins, and lipid
membranes. The sudden influx of oxygen overwhelms the cell’s antioxidant defenses, such
, as glutathione. This process is particularly relevant in clinical scenarios like myocardial
infarction or stroke treatments. Clinicians must be aware that while restoring blood flow is
necessary, it can paradoxicaly cause additional cellular damage.
6. Which type of necrosis is characterized by the conversion of tissue into a proteinaceous,
firm, and opaque state, typically seen in the heart or kidneys?
A. Liquefactive necrosis
B. Caseous necrosis
C. Fat necrosis
D. Coagulative necrosis
Correct Answer: D
Rationale: Coagulative necrosis primarily occurs as a result of protein denaturation,
causing the albumin to transform into a firm, opaque state. It is most commonly associated
with hypoxic injury resulting from infarction in organs like the heart and kidneys. The
structural framework of the tissue is maintained for several days after cell death, giving it a
characteristic ‘ghost-like’ appearance under a microscope. This type of necrosis contrasts
with liquefactive necrosis, where tissues become soft and liquid. Recognizing these
patterns helps pathologists identify the underlying cause of tissue death during autopsy or
biopsy.
7. Liquefactive necrosis is most commonly associated with ischemic injury to which organ?
A. Spleen
B. Liver
C. Heart
D. Brain
Correct Answer: D
Rationale: Liquefactive necrosis occurs in the brain because neurons and glial cells contain
high levels of digestive enzymes and lipids. When brain cells die, these hydrolases dissolve
the tissue, turning it into a soft, liquid mass. This process is often triggered by bacterial
infections or ischemic strokes within the central nervous system. Because the brain lacks a
strong connective tissue framework, the necrotic area eventually forms a cyst or fluid-filled
cavity. Understanding this helps explain why brain infarcts lead to permanent structural
defects and loss of function.
8. Which of the following describes programmed cell death that is a normal part of
development and tissue homeostasis?
A. Apoptosis
B. Necrosis
