LATEST MARYVILLE PATHO NURS 611 EXAM 1
ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES LATEST
UPDATES 2026-2027 (VERIFIED ANSWERS)
ALREADY GRADED A+
1. A patient develops skeletal muscle hypertrophy after beginning a resistance
training program. Which type of cellular adaptation best explains this change?
A. Hyperplasia
B. Metaplasia
C. Dysplasia
D. Hypertrophy
Answer: D. Hypertrophy
Rationale: Hypertrophy is an increase in the size of existing cells, leading to
enlargement of an organ or tissue. Skeletal muscle adapts to increased workload
primarily through hypertrophy because mature muscle cells have limited
capacity for cell division. Hyperplasia is an increase in cell number rather than
cell size.
2. A patient has prolonged ischemia to the myocardium following an acute
coronary artery occlusion. Which type of cell death is most likely to occur?
A. Apoptosis
B. Atrophy
C. Hyperplasia
D. Necrosis
,Answer: D. Necrosis
Rationale: Necrosis results from irreversible cellular injury caused by factors
such as prolonged ischemia, trauma, or toxins. Myocardial infarction produces
coagulative necrosis due to loss of blood supply. Apoptosis is programmed cell
death that typically does not provoke inflammation.
3. Which intracellular change is considered one of the earliest manifestations of
reversible cell injury?
A. Nuclear fragmentation
B. Plasma membrane rupture
C. Cellular swelling due to ATP depletion
D. Chromatin dissolution
Answer: C. Cellular swelling due to ATP depletion
Rationale: ATP depletion impairs the sodium-potassium ATPase pump, allowing
sodium and water to accumulate within cells. Cellular swelling is a hallmark of
reversible injury and may resolve if oxygen delivery is restored.
4. Which inflammatory mediator is primarily responsible for vasodilation during
the acute inflammatory response?
A. Complement C3
B. Bradykinin only
C. Histamine
D. Fibrinogen
Answer: C. Histamine
Rationale: Histamine is released mainly from mast cells and basophils. It rapidly
produces vasodilation and increased vascular permeability, contributing to
redness, warmth, and edema during inflammation.
5. A nurse practitioner explains that neutrophils are the predominant leukocytes
during which phase of inflammation?
,A. Chronic inflammation
B. Allergic reactions
C. Viral infections
D. Acute inflammation
Answer: D. Acute inflammation
Rationale: Neutrophils are the first leukocytes to migrate to sites of acute tissue
injury or bacterial infection. Macrophages and lymphocytes become more
prominent during chronic inflammation.
6. Which cytokine plays a major role in producing fever during infection?
A. Albumin
B. Hemoglobin
C. Interleukin-1 (IL-1)
D. Insulin
Answer: C. Interleukin-1 (IL-1)
Rationale: IL-1, along with TNF-α and IL-6, acts on the hypothalamus to
stimulate prostaglandin production, resulting in fever during inflammation and
infection.
7. Which statement best describes apoptosis?
A. It always produces significant inflammation.
B. It occurs only after infection.
C. It is programmed cell death that removes damaged or unnecessary cells.
D. It results from complete ATP depletion.
Answer: C. It is programmed cell death that removes damaged or unnecessary
cells.
Rationale: Apoptosis is a tightly regulated process that eliminates damaged or
unwanted cells without triggering a substantial inflammatory response.
8. Which electrolyte is the primary determinant of extracellular fluid osmolality?
, A. Potassium
B. Calcium
C. Magnesium
D. Sodium
Answer: D. Sodium
Rationale: Sodium is the major extracellular cation and is primarily responsible
for regulating extracellular fluid volume and osmolality.
9. A patient has metabolic acidosis. Which compensatory response is expected?
A. Decreased respiratory rate
B. Increased bicarbonate excretion
C. Hyperventilation to decrease carbon dioxide levels
D. Increased carbon dioxide retention
Answer: C. Hyperventilation to decrease carbon dioxide levels
Rationale: Hyperventilation lowers arterial carbon dioxide, reducing carbonic
acid concentration and partially compensating for metabolic acidosis.
10. Which immune cell differentiates into plasma cells that produce antibodies?
A. Neutrophil
B. Macrophage
C. T lymphocyte
D. B lymphocyte
Answer: D. B lymphocyte
Rationale: Activated B lymphocytes mature into plasma cells that synthesize and
secrete antigen-specific antibodies as part of humoral immunity.
11. Which immunoglobulin is most abundant in human serum?
A. IgA
B. IgE
C. IgM
D. IgG
ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES LATEST
UPDATES 2026-2027 (VERIFIED ANSWERS)
ALREADY GRADED A+
1. A patient develops skeletal muscle hypertrophy after beginning a resistance
training program. Which type of cellular adaptation best explains this change?
A. Hyperplasia
B. Metaplasia
C. Dysplasia
D. Hypertrophy
Answer: D. Hypertrophy
Rationale: Hypertrophy is an increase in the size of existing cells, leading to
enlargement of an organ or tissue. Skeletal muscle adapts to increased workload
primarily through hypertrophy because mature muscle cells have limited
capacity for cell division. Hyperplasia is an increase in cell number rather than
cell size.
2. A patient has prolonged ischemia to the myocardium following an acute
coronary artery occlusion. Which type of cell death is most likely to occur?
A. Apoptosis
B. Atrophy
C. Hyperplasia
D. Necrosis
,Answer: D. Necrosis
Rationale: Necrosis results from irreversible cellular injury caused by factors
such as prolonged ischemia, trauma, or toxins. Myocardial infarction produces
coagulative necrosis due to loss of blood supply. Apoptosis is programmed cell
death that typically does not provoke inflammation.
3. Which intracellular change is considered one of the earliest manifestations of
reversible cell injury?
A. Nuclear fragmentation
B. Plasma membrane rupture
C. Cellular swelling due to ATP depletion
D. Chromatin dissolution
Answer: C. Cellular swelling due to ATP depletion
Rationale: ATP depletion impairs the sodium-potassium ATPase pump, allowing
sodium and water to accumulate within cells. Cellular swelling is a hallmark of
reversible injury and may resolve if oxygen delivery is restored.
4. Which inflammatory mediator is primarily responsible for vasodilation during
the acute inflammatory response?
A. Complement C3
B. Bradykinin only
C. Histamine
D. Fibrinogen
Answer: C. Histamine
Rationale: Histamine is released mainly from mast cells and basophils. It rapidly
produces vasodilation and increased vascular permeability, contributing to
redness, warmth, and edema during inflammation.
5. A nurse practitioner explains that neutrophils are the predominant leukocytes
during which phase of inflammation?
,A. Chronic inflammation
B. Allergic reactions
C. Viral infections
D. Acute inflammation
Answer: D. Acute inflammation
Rationale: Neutrophils are the first leukocytes to migrate to sites of acute tissue
injury or bacterial infection. Macrophages and lymphocytes become more
prominent during chronic inflammation.
6. Which cytokine plays a major role in producing fever during infection?
A. Albumin
B. Hemoglobin
C. Interleukin-1 (IL-1)
D. Insulin
Answer: C. Interleukin-1 (IL-1)
Rationale: IL-1, along with TNF-α and IL-6, acts on the hypothalamus to
stimulate prostaglandin production, resulting in fever during inflammation and
infection.
7. Which statement best describes apoptosis?
A. It always produces significant inflammation.
B. It occurs only after infection.
C. It is programmed cell death that removes damaged or unnecessary cells.
D. It results from complete ATP depletion.
Answer: C. It is programmed cell death that removes damaged or unnecessary
cells.
Rationale: Apoptosis is a tightly regulated process that eliminates damaged or
unwanted cells without triggering a substantial inflammatory response.
8. Which electrolyte is the primary determinant of extracellular fluid osmolality?
, A. Potassium
B. Calcium
C. Magnesium
D. Sodium
Answer: D. Sodium
Rationale: Sodium is the major extracellular cation and is primarily responsible
for regulating extracellular fluid volume and osmolality.
9. A patient has metabolic acidosis. Which compensatory response is expected?
A. Decreased respiratory rate
B. Increased bicarbonate excretion
C. Hyperventilation to decrease carbon dioxide levels
D. Increased carbon dioxide retention
Answer: C. Hyperventilation to decrease carbon dioxide levels
Rationale: Hyperventilation lowers arterial carbon dioxide, reducing carbonic
acid concentration and partially compensating for metabolic acidosis.
10. Which immune cell differentiates into plasma cells that produce antibodies?
A. Neutrophil
B. Macrophage
C. T lymphocyte
D. B lymphocyte
Answer: D. B lymphocyte
Rationale: Activated B lymphocytes mature into plasma cells that synthesize and
secrete antigen-specific antibodies as part of humoral immunity.
11. Which immunoglobulin is most abundant in human serum?
A. IgA
B. IgE
C. IgM
D. IgG
