NR 507 Exam 1: Advanced Pathophysiology V1 Updated
and Latest Questions and Correct Answers with Rationale
1. A patient exhibits an increase in the size of their left ventricular heart cells due to long-
standing hypertension. This cellular adaptation is known as:
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
Ans: B
Rationale: Hypertrophy is defined as an increase in the size of individual cells, which consequently
increases the size of the affected organ. In the case of the heart, chronic hypertension forces the
myocardium to work harder against increased resistance. Unlike hyperplasia, the number of cells does
not increase because cardiac myocytes have limited mitotic ability. This process is often a compensatory
mechanism to maintain cardiac output under stress. If the underlying cause is not treated, pathological
hypertrophy can eventually lead to heart failure. It is distinct from metaplasia, which involves a change in
cell type rather than size.
,2. Which type of cellular adaptation occurs when the ciliated columnar epithelial cells of the
airway are replaced by stratified squamous epithelial cells in a chronic smoker?
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Hyperplasia
Ans: B
Rationale: Metaplasia is a reversible replacement of one mature cell type by another mature cell type.
This typically occurs in response to chronic irritation or inflammation, such as exposure to cigarette
smoke. The new cell type is usually better able to withstand the adverse environment but lacks the
specialized functions of the original cells. For example, losing ciliary function in the airway reduces the
ability to clear mucus and debris. If the stimulus is removed, the tissue can often revert to its original
state. However, prolonged metaplasia can sometimes progress to dysplasia or malignancy.
3. A biopsy of a cervical lesion reveals cells that vary in size and shape, with large nuclei and
an increased rate of mitosis. This condition is termed:
A. Metaplasia
B. Hyperplasia
C. Dysplasia
D. Atrophy
Ans: C
,Rationale: Dysplasia refers to abnormal changes in the size, shape, and organization of mature cells. It is
frequently encountered in epithelial tissues such as the cervix or the respiratory tract. While it is often
called ‘atypical hyperplasia,’ it is not a true adaptive process like hypertrophy or atrophy. Dysplastic
changes are often considered pre-neoplastic, meaning they may precede the development of cancer.
Healthcare providers monitor these changes closely using diagnostic tests like Pap smears. If the inciting
stimulus is removed, mild to moderate dysplasia may be reversible.
4. Which of the following is the most common cause of cellular injury in clinical practice?
A. Free radical damage
B. Chemical toxicity
C. Hypoxia
D. Genetic defects
Ans: C
Rationale: Hypoxia, or a lack of sufficient oxygen, is the single most common cause of cellular injury. It
can result from a reduced amount of oxygen in the air, loss of hemoglobin, or decreased blood flow
(ischemia). Without oxygen, the cell cannot perform aerobic respiration, leading to a decrease in ATP
production. The failure of the sodium-potassium pump then causes cellular swelling and metabolic
acidosis. This cascade of events can lead to irreversible damage if blood flow is not restored promptly.
Understanding hypoxia is fundamental to managing conditions like myocardial infarction and stroke.
, 5. During ischemia, the failure of the ATP-dependent sodium-potassium pump leads to
which immediate cellular consequence?
A. Cellular dehydration
B. Cellular swelling
C. Increased intracellular potassium
D. Decreased intracellular calcium
Ans: B
Rationale: When ATP levels drop due to ischemia, the sodium-potassium pump ceases to function
efficiently. This causes sodium to accumulate inside the cell, while potassium leaks out into the
extracellular space. Because water follows sodium through osmosis, the cell begins to swell significantly.
This process is known as oncosis or hydropic degeneration. If the swelling continues, it can lead to the
rupture of organelles like the endoplasmic reticulum. Restoration of oxygen can reverse this if the
damage has not reached a critical threshold.
6. Which type of necrosis is typically associated with a bacterial infection (staphylococci or
streptococci) in the brain?
A. Coagulative necrosis
B. Caseous necrosis
C. Liquefactive necrosis
D. Fat necrosis
Ans: C
and Latest Questions and Correct Answers with Rationale
1. A patient exhibits an increase in the size of their left ventricular heart cells due to long-
standing hypertension. This cellular adaptation is known as:
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
Ans: B
Rationale: Hypertrophy is defined as an increase in the size of individual cells, which consequently
increases the size of the affected organ. In the case of the heart, chronic hypertension forces the
myocardium to work harder against increased resistance. Unlike hyperplasia, the number of cells does
not increase because cardiac myocytes have limited mitotic ability. This process is often a compensatory
mechanism to maintain cardiac output under stress. If the underlying cause is not treated, pathological
hypertrophy can eventually lead to heart failure. It is distinct from metaplasia, which involves a change in
cell type rather than size.
,2. Which type of cellular adaptation occurs when the ciliated columnar epithelial cells of the
airway are replaced by stratified squamous epithelial cells in a chronic smoker?
A. Dysplasia
B. Metaplasia
C. Anaplasia
D. Hyperplasia
Ans: B
Rationale: Metaplasia is a reversible replacement of one mature cell type by another mature cell type.
This typically occurs in response to chronic irritation or inflammation, such as exposure to cigarette
smoke. The new cell type is usually better able to withstand the adverse environment but lacks the
specialized functions of the original cells. For example, losing ciliary function in the airway reduces the
ability to clear mucus and debris. If the stimulus is removed, the tissue can often revert to its original
state. However, prolonged metaplasia can sometimes progress to dysplasia or malignancy.
3. A biopsy of a cervical lesion reveals cells that vary in size and shape, with large nuclei and
an increased rate of mitosis. This condition is termed:
A. Metaplasia
B. Hyperplasia
C. Dysplasia
D. Atrophy
Ans: C
,Rationale: Dysplasia refers to abnormal changes in the size, shape, and organization of mature cells. It is
frequently encountered in epithelial tissues such as the cervix or the respiratory tract. While it is often
called ‘atypical hyperplasia,’ it is not a true adaptive process like hypertrophy or atrophy. Dysplastic
changes are often considered pre-neoplastic, meaning they may precede the development of cancer.
Healthcare providers monitor these changes closely using diagnostic tests like Pap smears. If the inciting
stimulus is removed, mild to moderate dysplasia may be reversible.
4. Which of the following is the most common cause of cellular injury in clinical practice?
A. Free radical damage
B. Chemical toxicity
C. Hypoxia
D. Genetic defects
Ans: C
Rationale: Hypoxia, or a lack of sufficient oxygen, is the single most common cause of cellular injury. It
can result from a reduced amount of oxygen in the air, loss of hemoglobin, or decreased blood flow
(ischemia). Without oxygen, the cell cannot perform aerobic respiration, leading to a decrease in ATP
production. The failure of the sodium-potassium pump then causes cellular swelling and metabolic
acidosis. This cascade of events can lead to irreversible damage if blood flow is not restored promptly.
Understanding hypoxia is fundamental to managing conditions like myocardial infarction and stroke.
, 5. During ischemia, the failure of the ATP-dependent sodium-potassium pump leads to
which immediate cellular consequence?
A. Cellular dehydration
B. Cellular swelling
C. Increased intracellular potassium
D. Decreased intracellular calcium
Ans: B
Rationale: When ATP levels drop due to ischemia, the sodium-potassium pump ceases to function
efficiently. This causes sodium to accumulate inside the cell, while potassium leaks out into the
extracellular space. Because water follows sodium through osmosis, the cell begins to swell significantly.
This process is known as oncosis or hydropic degeneration. If the swelling continues, it can lead to the
rupture of organelles like the endoplasmic reticulum. Restoration of oxygen can reverse this if the
damage has not reached a critical threshold.
6. Which type of necrosis is typically associated with a bacterial infection (staphylococci or
streptococci) in the brain?
A. Coagulative necrosis
B. Caseous necrosis
C. Liquefactive necrosis
D. Fat necrosis
Ans: C
