NR 507 Exam 1: Advanced Pathophysiology V3 -
Chamberlain University Updated and Latest Questions and
Correct Answers with Rationale
1. A 45-year-old male smoker is found to have a replacement of his normal ciliated columnar epithelial cells
with stratified squamous epithelial cells. What is the most likely cellular adaptation?
A. Atrophy
B. Metaplasia
C. Hyperplasia
D. Dysplasia
Ans: B
Explanation: Metaplasia is characterized by the reversible replacement of one mature cell type by
another mature cell type. This process often occurs in response to chronic irritation or stress, such as
cigarette smoke in the bronchial lining. While the new cells are more resilient to the environmental
insult, they often lack specialized functions like cilia. This transformation is a protective mechanism but
can lead to impaired clearance of mucus. If the irritating stimulus is not removed, it may eventually
progress to dysplasia or malignancy.
2. Which mechanism is primarily responsible for the cellular swelling observed during hypoxic injury?
A. Release of lysosomal enzymes
B. Increased protein synthesis
C. Failure of the sodium-potassium pump
D. Decreased intracellular osmotic pressure
Ans: C
,Explanation: Hypoxia leads to a decrease in ATP production due to the failure of aerobic metabolism.
Without sufficient ATP, the sodium-potassium membrane pump fails to maintain electrolyte gradients
across the cell membrane. This results in an accumulation of sodium inside the cell, which draws water
inward through osmosis. The resulting cellular swelling is one of the earliest signs of reversible cell
injury. If ATP levels are not restored, the swelling progresses and can lead to irreversible damage to
organelles.
3. During a clinical evaluation, a patient exhibits abnormal changes in the size, shape, and organization of
mature cells. This finding is best described as:
A. Hypertrophy
B. Atrophy
C. Metaplasia
D. Dysplasia
Ans: D
Explanation: Dysplasia refers to abnormal changes in the size, shape, and organization of mature cells. It
is frequently encountered in the epithelial tissue of the cervix and respiratory tract. Although it is often
called atypical hyperplasia, it is not a true adaptive process. Dysplastic changes are considered pre-
neoplastic and are closely monitored for progression to cancer. However, if the inciting stimulus is
removed, dysplastic changes can sometimes be reversible.
4. Which type of cell death involves cellular self-digestion through the action of lysosomal enzymes and
typically results in an inflammatory response?
A. Apoptosis
B. Necrosis
, C. Autophagy
D. Senescence
Ans: B
Explanation: Necrosis is characterized by the rapid loss of plasma membrane structure and the swelling
of organelles. It usually occurs following severe, acute injury and results in the release of intracellular
contents. These released contents trigger a localized inflammatory response in the surrounding tissue.
Unlike apoptosis, necrosis is always a pathological process and is never programmed. It can be classified
into several types, including coagulative, liquefactive, and caseous necrosis.
5. A patient with tuberculosis is found to have lung tissue that resembles clumped cheese. What type of
necrosis does this represent?
A. Caseous necrosis
B. Coagulative necrosis
C. Fat necrosis
D. Liquefactive necrosis
Ans: A
Explanation: Caseous necrosis is a distinct form of cell death most commonly associated with
tuberculous pulmonary infection. It combines elements of both coagulative and liquefactive necrosis as
the tissue architecture is partially preserved. The affected area appears soft, granular, and yellowish,
resembling clumped cheese. A granulomatous inflammatory wall typically encloses the necrotic debris.
This process is essential for isolating the infection but results in significant tissue destruction.
6. What is the hallmark of irreversible cell injury?
A. Cellular swelling
Chamberlain University Updated and Latest Questions and
Correct Answers with Rationale
1. A 45-year-old male smoker is found to have a replacement of his normal ciliated columnar epithelial cells
with stratified squamous epithelial cells. What is the most likely cellular adaptation?
A. Atrophy
B. Metaplasia
C. Hyperplasia
D. Dysplasia
Ans: B
Explanation: Metaplasia is characterized by the reversible replacement of one mature cell type by
another mature cell type. This process often occurs in response to chronic irritation or stress, such as
cigarette smoke in the bronchial lining. While the new cells are more resilient to the environmental
insult, they often lack specialized functions like cilia. This transformation is a protective mechanism but
can lead to impaired clearance of mucus. If the irritating stimulus is not removed, it may eventually
progress to dysplasia or malignancy.
2. Which mechanism is primarily responsible for the cellular swelling observed during hypoxic injury?
A. Release of lysosomal enzymes
B. Increased protein synthesis
C. Failure of the sodium-potassium pump
D. Decreased intracellular osmotic pressure
Ans: C
,Explanation: Hypoxia leads to a decrease in ATP production due to the failure of aerobic metabolism.
Without sufficient ATP, the sodium-potassium membrane pump fails to maintain electrolyte gradients
across the cell membrane. This results in an accumulation of sodium inside the cell, which draws water
inward through osmosis. The resulting cellular swelling is one of the earliest signs of reversible cell
injury. If ATP levels are not restored, the swelling progresses and can lead to irreversible damage to
organelles.
3. During a clinical evaluation, a patient exhibits abnormal changes in the size, shape, and organization of
mature cells. This finding is best described as:
A. Hypertrophy
B. Atrophy
C. Metaplasia
D. Dysplasia
Ans: D
Explanation: Dysplasia refers to abnormal changes in the size, shape, and organization of mature cells. It
is frequently encountered in the epithelial tissue of the cervix and respiratory tract. Although it is often
called atypical hyperplasia, it is not a true adaptive process. Dysplastic changes are considered pre-
neoplastic and are closely monitored for progression to cancer. However, if the inciting stimulus is
removed, dysplastic changes can sometimes be reversible.
4. Which type of cell death involves cellular self-digestion through the action of lysosomal enzymes and
typically results in an inflammatory response?
A. Apoptosis
B. Necrosis
, C. Autophagy
D. Senescence
Ans: B
Explanation: Necrosis is characterized by the rapid loss of plasma membrane structure and the swelling
of organelles. It usually occurs following severe, acute injury and results in the release of intracellular
contents. These released contents trigger a localized inflammatory response in the surrounding tissue.
Unlike apoptosis, necrosis is always a pathological process and is never programmed. It can be classified
into several types, including coagulative, liquefactive, and caseous necrosis.
5. A patient with tuberculosis is found to have lung tissue that resembles clumped cheese. What type of
necrosis does this represent?
A. Caseous necrosis
B. Coagulative necrosis
C. Fat necrosis
D. Liquefactive necrosis
Ans: A
Explanation: Caseous necrosis is a distinct form of cell death most commonly associated with
tuberculous pulmonary infection. It combines elements of both coagulative and liquefactive necrosis as
the tissue architecture is partially preserved. The affected area appears soft, granular, and yellowish,
resembling clumped cheese. A granulomatous inflammatory wall typically encloses the necrotic debris.
This process is essential for isolating the infection but results in significant tissue destruction.
6. What is the hallmark of irreversible cell injury?
A. Cellular swelling
