NR-283 Final Exam: Pathophysiology V2 Updated and
Latest Questions and Correct Answers with Rationale -
Chamberlain University
1. Which cellular adaptation is characterized by a decrease in cell size?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Ans: C
Rationale: Atrophy is a cellular adaptation where cells decrease in size to survive under adverse
conditions. This often occurs due to a lack of use, loss of nerve supply, or inadequate nutrition. As the
cells shrink, the overall mass of the organ or tissue also decreases significantly. This process is generally
reversible if the underlying cause is removed in time. It represents a functional retreat to a lower level of
metabolic activity. Pathophysiology courses emphasize this as a common response to chronic illness or
immobilization.
2. What occurs during the process of hypertrophy?
A. Increase in cell number
B. Replacement of one cell type with another
C. Programmed cell death
D. Increase in cell size
Ans: D
,Rationale: Hypertrophy involves an increase in the size of individual cells, which leads to organ
enlargement. Unlike hyperplasia, there is no increase in the total number of cells present. This is
frequently seen in cardiac and skeletal muscle tissue where cells cannot divide. It can be a physiological
response, such as muscle growth from exercise, or pathological. For example, the left ventricle often
enlarges to pump against high blood pressure. Recognizing the difference between hypertrophy and
hyperplasia is essential for diagnosing heart conditions.
3. Metaplasia is defined as:
A. The replacement of one mature cell type with another
B. The disordered growth and maturation of an epithelium
C. The total failure of an organ to develop
D. The programmed death of damaged cells
Ans: A
Rationale: Metaplasia is a reversible change where one adult cell type is replaced by another. This
usually occurs in response to chronic irritation or inflammation in a specific area. A common example is
the change of ciliated columnar epithelium to squamous epithelium in smokers. While the new cells are
more resilient, they often lose specialized functions like mucus secretion. If the irritation persists, it can
sometimes progress to more dangerous cellular changes. It is a protective mechanism that the body
employs to survive environmental stress.
,4. Which type of cell death is considered a programmed and regulated process?
A. Apoptosis
B. Infarction
C. Necrosis
D. Gangrene
Ans: A
Rationale: Apoptosis is known as programmed cell death, which is a highly regulated biological process.
It serves to eliminate old, damaged, or unnecessary cells without causing inflammation. During apoptosis,
the cell fragments into neat packages that are easily digested by phagocytes. This process is vital for
normal development and the maintenance of healthy tissue. Necrosis, by contrast, is unplanned and leads
to a messy inflammatory response. Medical students must distinguish these two processes to understand
disease progression and healing.
5. What is the primary characteristic of the vascular phase of acute inflammation?
A. Vasoconstriction followed by vasodilation
B. Leukocyte migration
C. Phagocytosis of bacteria
D. Formation of scar tissue
Ans: A
Rationale: The vascular phase of inflammation begins with a brief period of vasoconstriction for
protection. This is immediately followed by vasodilation, which increases blood flow to the injured site.
, Increased capillary permeability allows fluid and proteins to leak into the interstitial space. This influx of
fluid is what causes the classic signs of swelling and redness. Histamine and other mediators are
responsible for triggering these specific vascular changes. Understanding this phase helps clinicians
manage the early symptoms of injury or infection.
6. Which chemical mediator is primarily responsible for the early symptoms of an allergic
reaction?
A. Interleukin-1
B. Histamine
C. Complement proteins
D. C-reactive protein
Ans: B
Rationale: Histamine is a major chemical mediator stored in the granules of mast cells. It is released
rapidly during injury or in response to an allergen encounter. Once released, it causes significant
vasodilation and increased vascular permeability in the local area. This leads to the symptoms of itching,
redness, and swelling seen in allergies. Antihistamines are commonly used to block these effects and
provide relief to patients. It is a critical component of the body’s immediate inflammatory and immune
responses.
Latest Questions and Correct Answers with Rationale -
Chamberlain University
1. Which cellular adaptation is characterized by a decrease in cell size?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Ans: C
Rationale: Atrophy is a cellular adaptation where cells decrease in size to survive under adverse
conditions. This often occurs due to a lack of use, loss of nerve supply, or inadequate nutrition. As the
cells shrink, the overall mass of the organ or tissue also decreases significantly. This process is generally
reversible if the underlying cause is removed in time. It represents a functional retreat to a lower level of
metabolic activity. Pathophysiology courses emphasize this as a common response to chronic illness or
immobilization.
2. What occurs during the process of hypertrophy?
A. Increase in cell number
B. Replacement of one cell type with another
C. Programmed cell death
D. Increase in cell size
Ans: D
,Rationale: Hypertrophy involves an increase in the size of individual cells, which leads to organ
enlargement. Unlike hyperplasia, there is no increase in the total number of cells present. This is
frequently seen in cardiac and skeletal muscle tissue where cells cannot divide. It can be a physiological
response, such as muscle growth from exercise, or pathological. For example, the left ventricle often
enlarges to pump against high blood pressure. Recognizing the difference between hypertrophy and
hyperplasia is essential for diagnosing heart conditions.
3. Metaplasia is defined as:
A. The replacement of one mature cell type with another
B. The disordered growth and maturation of an epithelium
C. The total failure of an organ to develop
D. The programmed death of damaged cells
Ans: A
Rationale: Metaplasia is a reversible change where one adult cell type is replaced by another. This
usually occurs in response to chronic irritation or inflammation in a specific area. A common example is
the change of ciliated columnar epithelium to squamous epithelium in smokers. While the new cells are
more resilient, they often lose specialized functions like mucus secretion. If the irritation persists, it can
sometimes progress to more dangerous cellular changes. It is a protective mechanism that the body
employs to survive environmental stress.
,4. Which type of cell death is considered a programmed and regulated process?
A. Apoptosis
B. Infarction
C. Necrosis
D. Gangrene
Ans: A
Rationale: Apoptosis is known as programmed cell death, which is a highly regulated biological process.
It serves to eliminate old, damaged, or unnecessary cells without causing inflammation. During apoptosis,
the cell fragments into neat packages that are easily digested by phagocytes. This process is vital for
normal development and the maintenance of healthy tissue. Necrosis, by contrast, is unplanned and leads
to a messy inflammatory response. Medical students must distinguish these two processes to understand
disease progression and healing.
5. What is the primary characteristic of the vascular phase of acute inflammation?
A. Vasoconstriction followed by vasodilation
B. Leukocyte migration
C. Phagocytosis of bacteria
D. Formation of scar tissue
Ans: A
Rationale: The vascular phase of inflammation begins with a brief period of vasoconstriction for
protection. This is immediately followed by vasodilation, which increases blood flow to the injured site.
, Increased capillary permeability allows fluid and proteins to leak into the interstitial space. This influx of
fluid is what causes the classic signs of swelling and redness. Histamine and other mediators are
responsible for triggering these specific vascular changes. Understanding this phase helps clinicians
manage the early symptoms of injury or infection.
6. Which chemical mediator is primarily responsible for the early symptoms of an allergic
reaction?
A. Interleukin-1
B. Histamine
C. Complement proteins
D. C-reactive protein
Ans: B
Rationale: Histamine is a major chemical mediator stored in the granules of mast cells. It is released
rapidly during injury or in response to an allergen encounter. Once released, it causes significant
vasodilation and increased vascular permeability in the local area. This leads to the symptoms of itching,
redness, and swelling seen in allergies. Antihistamines are commonly used to block these effects and
provide relief to patients. It is a critical component of the body’s immediate inflammatory and immune
responses.
