NR283 Pathophysiology Exam 1 Prep Updated and Latest
Questions and Correct Answers with Rationale
1. A patient who has been bedridden for several weeks exhibits a decrease in the size of
their calf muscles. This cellular adaptation is best described as:
A. Hypertrophy
B. Metaplasia
C. Hyperplasia
D. Atrophy
Ans: D
Rationale: Atrophy is defined as a decrease in cellular size and functional capacity due to decreased
demand. This occurs frequently in skeletal muscle when it is not used for extended periods of time. The
cell reduces its oxygen consumption and protein synthesis to survive under low-demand conditions. It is
a reversible process if the workload is restored to the muscle tissue. Pathological atrophy can also result
from loss of endocrine stimulation or persistent ischemia. Nurses should recognize this adaptation to
implement early physical therapy interventions for immobilized patients.
2. The heart of a patient with chronic hypertension shows an increase in the thickness of the
left ventricular wall. What type of cellular adaptation is this?
A. Metaplasia
B. Dysplasia
C. Hyperplasia
D. Hypertrophy
Ans: D
Rationale: Hypertrophy represents an increase in the size of individual cells, leading to an increase in
organ size. In the heart, this is a response to an increased workload caused by high systemic blood
pressure. Unlike hyperplasia, the muscle cells do not divide but instead synthesize more contractile
proteins. This adaptation initially allows the heart to maintain cardiac output against higher resistance.
Over time, however, the enlarged muscle may become ischemic and lead to heart failure. Understanding
this mechanism helps clinicians monitor the progression of hypertensive cardiovascular disease.
,3. Following the surgical removal of part of the liver, the remaining liver cells begin to divide
rapidly to restore the organ’s mass. This is an example of:
A. Pathologic Hyperplasia
B. Dysplasia
C. Metaplasia
D. Compensatory Hyperplasia
Ans: D
Rationale: Hyperplasia is an increase in the number of cells in an organ or tissue. Compensatory
hyperplasia is a physiological response that allows certain organs, like the liver, to regenerate. This
process is driven by growth factors that stimulate the remaining cells to enter the cell cycle. Once the
required mass is restored, the process is strictly regulated and ceases naturally. This differs from
pathologic hyperplasia, which is often caused by excessive hormonal stimulation. It is a vital mechanism
for recovery after tissue loss or injury in regenerative tissues.
4. A long-term smoker undergoes a bronchoscopy, which reveals that the normal ciliated
columnar epithelium of the airways has been replaced by stratified squamous epithelium.
This is called:
A. Anaplasia
B. Atrophy
C. Dysplasia
D. Metaplasia
Ans: D
Rationale: Metaplasia is a reversible change in which one adult cell type is replaced by another. In
smokers, the fragile columnar cells change into tougher squamous cells to survive chronic irritation.
While the new cells are more durable, they lose the protective cilia and mucus secretion functions. This
loss of the mucociliary escalator increases the patient’s risk for respiratory infections. If the irritation is
removed, the tissue can eventually revert to its original cell type. However, persistent metaplasia can
serve as a precursor to cancerous transformations in some individuals.
, 5. A cervical Pap smear result shows abnormal changes in cell size, shape, and organization.
These findings are characteristic of:
A. Dysplasia
B. Metaplasia
C. Hypertrophy
D. Hyperplasia
Ans: A
Rationale: Dysplasia refers to deranged cell growth that results in varied sizes, shapes, and organization.
It is often associated with chronic irritation or inflammation, such as HPV infection in the cervix. While it
is not a true adaptive process, it is frequently a precursor to the development of cancer. Dysplastic
changes are often reversible if the triggering stimulus is removed early enough. High-grade dysplasia is
more likely to progress to malignancy than low-grade changes. Regular screening is essential to detect
these changes before they advance to invasive carcinoma.
6. What is the most common cause of cellular injury in clinical practice?
A. Chemical agents
B. Genetic defects
C. Hypoxia
D. Infectious agents
Ans: C
Rationale: Hypoxia, or oxygen deprivation, is the single most common cause of cellular injury and death.
It can result from ischemia, reduced atmospheric oxygen, or decreased hemoglobin efficiency. Without
oxygen, the cell cannot produce ATP through aerobic metabolism, leading to pump failure. This failure
causes sodium and water to enter the cell, resulting in cellular swelling. If oxygen is restored quickly, the
injury may be reversible, but prolonged hypoxia leads to necrosis. Recognizing signs of hypoxia is a
critical nursing skill for preventing permanent tissue damage.
7. During hypoxic injury, the failure of the sodium-potassium pump leads to which
immediate cellular consequence?
A. Cellular shrinkage
B. Increased ATP production
C. Intracellular acidosis
D. Cellular swelling
Ans: D
Questions and Correct Answers with Rationale
1. A patient who has been bedridden for several weeks exhibits a decrease in the size of
their calf muscles. This cellular adaptation is best described as:
A. Hypertrophy
B. Metaplasia
C. Hyperplasia
D. Atrophy
Ans: D
Rationale: Atrophy is defined as a decrease in cellular size and functional capacity due to decreased
demand. This occurs frequently in skeletal muscle when it is not used for extended periods of time. The
cell reduces its oxygen consumption and protein synthesis to survive under low-demand conditions. It is
a reversible process if the workload is restored to the muscle tissue. Pathological atrophy can also result
from loss of endocrine stimulation or persistent ischemia. Nurses should recognize this adaptation to
implement early physical therapy interventions for immobilized patients.
2. The heart of a patient with chronic hypertension shows an increase in the thickness of the
left ventricular wall. What type of cellular adaptation is this?
A. Metaplasia
B. Dysplasia
C. Hyperplasia
D. Hypertrophy
Ans: D
Rationale: Hypertrophy represents an increase in the size of individual cells, leading to an increase in
organ size. In the heart, this is a response to an increased workload caused by high systemic blood
pressure. Unlike hyperplasia, the muscle cells do not divide but instead synthesize more contractile
proteins. This adaptation initially allows the heart to maintain cardiac output against higher resistance.
Over time, however, the enlarged muscle may become ischemic and lead to heart failure. Understanding
this mechanism helps clinicians monitor the progression of hypertensive cardiovascular disease.
,3. Following the surgical removal of part of the liver, the remaining liver cells begin to divide
rapidly to restore the organ’s mass. This is an example of:
A. Pathologic Hyperplasia
B. Dysplasia
C. Metaplasia
D. Compensatory Hyperplasia
Ans: D
Rationale: Hyperplasia is an increase in the number of cells in an organ or tissue. Compensatory
hyperplasia is a physiological response that allows certain organs, like the liver, to regenerate. This
process is driven by growth factors that stimulate the remaining cells to enter the cell cycle. Once the
required mass is restored, the process is strictly regulated and ceases naturally. This differs from
pathologic hyperplasia, which is often caused by excessive hormonal stimulation. It is a vital mechanism
for recovery after tissue loss or injury in regenerative tissues.
4. A long-term smoker undergoes a bronchoscopy, which reveals that the normal ciliated
columnar epithelium of the airways has been replaced by stratified squamous epithelium.
This is called:
A. Anaplasia
B. Atrophy
C. Dysplasia
D. Metaplasia
Ans: D
Rationale: Metaplasia is a reversible change in which one adult cell type is replaced by another. In
smokers, the fragile columnar cells change into tougher squamous cells to survive chronic irritation.
While the new cells are more durable, they lose the protective cilia and mucus secretion functions. This
loss of the mucociliary escalator increases the patient’s risk for respiratory infections. If the irritation is
removed, the tissue can eventually revert to its original cell type. However, persistent metaplasia can
serve as a precursor to cancerous transformations in some individuals.
, 5. A cervical Pap smear result shows abnormal changes in cell size, shape, and organization.
These findings are characteristic of:
A. Dysplasia
B. Metaplasia
C. Hypertrophy
D. Hyperplasia
Ans: A
Rationale: Dysplasia refers to deranged cell growth that results in varied sizes, shapes, and organization.
It is often associated with chronic irritation or inflammation, such as HPV infection in the cervix. While it
is not a true adaptive process, it is frequently a precursor to the development of cancer. Dysplastic
changes are often reversible if the triggering stimulus is removed early enough. High-grade dysplasia is
more likely to progress to malignancy than low-grade changes. Regular screening is essential to detect
these changes before they advance to invasive carcinoma.
6. What is the most common cause of cellular injury in clinical practice?
A. Chemical agents
B. Genetic defects
C. Hypoxia
D. Infectious agents
Ans: C
Rationale: Hypoxia, or oxygen deprivation, is the single most common cause of cellular injury and death.
It can result from ischemia, reduced atmospheric oxygen, or decreased hemoglobin efficiency. Without
oxygen, the cell cannot produce ATP through aerobic metabolism, leading to pump failure. This failure
causes sodium and water to enter the cell, resulting in cellular swelling. If oxygen is restored quickly, the
injury may be reversible, but prolonged hypoxia leads to necrosis. Recognizing signs of hypoxia is a
critical nursing skill for preventing permanent tissue damage.
7. During hypoxic injury, the failure of the sodium-potassium pump leads to which
immediate cellular consequence?
A. Cellular shrinkage
B. Increased ATP production
C. Intracellular acidosis
D. Cellular swelling
Ans: D
