Page 1 of 43
NUR 2063 PATHOPHYSIOLOGY
COMPREHENSIVE PRACTICE EXAM 1 -
QUESTIONS AND CORRECT ANSWERS
WITH DETAILED ANSWERS CURRENT
TESTING
SECTION 1: CELLULAR BIOLOGY & ADAPTATION (Questions 1–20)
D
1. Which organelle is primarily responsible for cellular respiration and energy
O
production?
N
A. Endoplasmic reticulum
O
B. Golgi apparatus
C. Mitochondria
T
D. Nucleus
C
Correct answer: C
O
Rationale: Mitochondria are the "powerhouses" of the cell, responsible for cellular
PY
respiration and energy production through oxidative phosphorylation. They
produce ATP (adenosine triphosphate) which fuels cellular functions.
2. The process by which cells become specialized in structure and function is
called:
A. Proliferation
B. Mitosis
C. Differentiation
D. Meiosis
Correct answer: C
Rationale: Differentiation is the process by which cells become specialized in
structure and function, allowing them to perform specific roles in the body.
, Page 2 of 43
3. Which organelle contains hydrolytic enzymes and is responsible for
intracellular digestion?
A. Peroxisome
B. Lysosome
C. Ribosome
D. Vacuole
Correct answer: B
Rationale: Lysosomes are membrane-bound organelles containing digestive
(hydrolytic) enzymes that break down macromolecules, cellular waste, and
pathogens. They are often called the "cell's garbage disposal."
4. A patient with chronic hypertension develops left ventricular hypertrophy.
This cellular adaptation is BEST described as:
D
A. Atrophy
O
B. Hyperplasia
N
C. Hypertrophy
O
D. Metaplasia
T
Correct answer: C
C
Rationale: Hypertrophy is an increase in cell size, often in response to increased
workload or stimulation. In hypertension, the left ventricle hypertrophies to
O
compensate for increased afterload. This adaptation initially maintains cardiac
PY
output but eventually becomes maladaptive, leading to heart failure.
5. A patient with chronic bronchitis develops squamous metaplasia in the
bronchial epithelium. This cellular adaptation is:
A. Reversible and protective
B. Irreversible and always leads to malignancy
C. An example of hyperplasia
D. A normal physiologic process
Correct answer: A
Rationale: Metaplasia is the reversible replacement of one mature cell type with
another, often in response to chronic irritation. Squamous metaplasia in the
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bronchial epithelium is protective against further irritation but increases the risk of
dysplasia and malignancy if the stimulus persists.
6. What is the definition of homeostasis?
A. A state of disease
B. An imbalance in body systems
C. Equilibrium, balance, and stability maintained through compensation
mechanisms
D. The process of cell division
Correct answer: C
Rationale: Homeostasis is the body's ability to maintain a stable internal
environment through self-regulating compensation mechanisms that respond to
minor changes and return the body to its normal state.
D
O
7. The primary mechanism of cell injury in ischemia is:
N
A. Direct cellular damage by toxins
O
B. Lack of oxygen leading to decreased ATP production
T
C. Formation of free radicals
D. Impaired calcium homeostasis
C
Correct answer: B
O
Rationale: Ischemia causes cell injury due to lack of oxygen, which leads to
PY
decreased ATP production. This impairs cellular functions, including ion pumps,
leading to cellular swelling and eventually cell death.
8. A patient suffers a myocardial infarction. Which type of necrosis is most
characteristic of ischemic injury in the heart?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis D. Fat necrosis
Correct answer: C
Rationale: Coagulative necrosis is the most common type of necrosis caused by
ischemia or infarction in solid organs (heart, kidney, spleen). The tissue architecture
is preserved for several days due to protein denaturation.
, Page 4 of 43
9. The process of programmed cell death that is energy-dependent and does
not trigger inflammation is called:
A. Necrosis
B. Apoptosis
C. Pyroptosis
D. Autophagy
Correct answer: B
Rationale: Apoptosis is programmed cell death that is energydependent. It is
characterized by cell shrinkage, chromatin condensation, and intact plasma
membranes, without triggering an inflammatory response. Necrosis is
unprogrammed and triggers inflammation.
D
10. A patient with carbon monoxide poisoning presents with hypoxia. The
mechanism of injury at the cellular level is:
O
A. Direct cellular damage
N
B. Disruption of oxidative phosphorylation
O
C. Impaired oxygen transport
T
D. Formation of free radicals
C
Correct answer: C
O
Rationale: Carbon monoxide binds to hemoglobin with high affinity (200-
PY
300 times greater than oxygen), reducing the oxygen-carrying capacity of
blood and impairing oxygen transport to tissues. 11. Which of the following
is a characteristic of malignant cells?
A. Well-differentiated with normal appearance
B. Anaplasia, pleomorphism, and increased nuclear-to-cytoplasmic ratio
C. Encapsulated and non-invasive
D. Low mitotic rate
Correct answer: B
Rationale: Malignant cells exhibit anaplasia (loss of differentiation),
pleomorphism (variation in size and shape), increased nuclear-tocytoplasmic
ratio, and a high mitotic rate. Benign tumors are welldifferentiated,
encapsulated, and non-invasive.
NUR 2063 PATHOPHYSIOLOGY
COMPREHENSIVE PRACTICE EXAM 1 -
QUESTIONS AND CORRECT ANSWERS
WITH DETAILED ANSWERS CURRENT
TESTING
SECTION 1: CELLULAR BIOLOGY & ADAPTATION (Questions 1–20)
D
1. Which organelle is primarily responsible for cellular respiration and energy
O
production?
N
A. Endoplasmic reticulum
O
B. Golgi apparatus
C. Mitochondria
T
D. Nucleus
C
Correct answer: C
O
Rationale: Mitochondria are the "powerhouses" of the cell, responsible for cellular
PY
respiration and energy production through oxidative phosphorylation. They
produce ATP (adenosine triphosphate) which fuels cellular functions.
2. The process by which cells become specialized in structure and function is
called:
A. Proliferation
B. Mitosis
C. Differentiation
D. Meiosis
Correct answer: C
Rationale: Differentiation is the process by which cells become specialized in
structure and function, allowing them to perform specific roles in the body.
, Page 2 of 43
3. Which organelle contains hydrolytic enzymes and is responsible for
intracellular digestion?
A. Peroxisome
B. Lysosome
C. Ribosome
D. Vacuole
Correct answer: B
Rationale: Lysosomes are membrane-bound organelles containing digestive
(hydrolytic) enzymes that break down macromolecules, cellular waste, and
pathogens. They are often called the "cell's garbage disposal."
4. A patient with chronic hypertension develops left ventricular hypertrophy.
This cellular adaptation is BEST described as:
D
A. Atrophy
O
B. Hyperplasia
N
C. Hypertrophy
O
D. Metaplasia
T
Correct answer: C
C
Rationale: Hypertrophy is an increase in cell size, often in response to increased
workload or stimulation. In hypertension, the left ventricle hypertrophies to
O
compensate for increased afterload. This adaptation initially maintains cardiac
PY
output but eventually becomes maladaptive, leading to heart failure.
5. A patient with chronic bronchitis develops squamous metaplasia in the
bronchial epithelium. This cellular adaptation is:
A. Reversible and protective
B. Irreversible and always leads to malignancy
C. An example of hyperplasia
D. A normal physiologic process
Correct answer: A
Rationale: Metaplasia is the reversible replacement of one mature cell type with
another, often in response to chronic irritation. Squamous metaplasia in the
, Page 3 of 43
bronchial epithelium is protective against further irritation but increases the risk of
dysplasia and malignancy if the stimulus persists.
6. What is the definition of homeostasis?
A. A state of disease
B. An imbalance in body systems
C. Equilibrium, balance, and stability maintained through compensation
mechanisms
D. The process of cell division
Correct answer: C
Rationale: Homeostasis is the body's ability to maintain a stable internal
environment through self-regulating compensation mechanisms that respond to
minor changes and return the body to its normal state.
D
O
7. The primary mechanism of cell injury in ischemia is:
N
A. Direct cellular damage by toxins
O
B. Lack of oxygen leading to decreased ATP production
T
C. Formation of free radicals
D. Impaired calcium homeostasis
C
Correct answer: B
O
Rationale: Ischemia causes cell injury due to lack of oxygen, which leads to
PY
decreased ATP production. This impairs cellular functions, including ion pumps,
leading to cellular swelling and eventually cell death.
8. A patient suffers a myocardial infarction. Which type of necrosis is most
characteristic of ischemic injury in the heart?
A. Liquefactive necrosis
B. Caseous necrosis
C. Coagulative necrosis D. Fat necrosis
Correct answer: C
Rationale: Coagulative necrosis is the most common type of necrosis caused by
ischemia or infarction in solid organs (heart, kidney, spleen). The tissue architecture
is preserved for several days due to protein denaturation.
, Page 4 of 43
9. The process of programmed cell death that is energy-dependent and does
not trigger inflammation is called:
A. Necrosis
B. Apoptosis
C. Pyroptosis
D. Autophagy
Correct answer: B
Rationale: Apoptosis is programmed cell death that is energydependent. It is
characterized by cell shrinkage, chromatin condensation, and intact plasma
membranes, without triggering an inflammatory response. Necrosis is
unprogrammed and triggers inflammation.
D
10. A patient with carbon monoxide poisoning presents with hypoxia. The
mechanism of injury at the cellular level is:
O
A. Direct cellular damage
N
B. Disruption of oxidative phosphorylation
O
C. Impaired oxygen transport
T
D. Formation of free radicals
C
Correct answer: C
O
Rationale: Carbon monoxide binds to hemoglobin with high affinity (200-
PY
300 times greater than oxygen), reducing the oxygen-carrying capacity of
blood and impairing oxygen transport to tissues. 11. Which of the following
is a characteristic of malignant cells?
A. Well-differentiated with normal appearance
B. Anaplasia, pleomorphism, and increased nuclear-to-cytoplasmic ratio
C. Encapsulated and non-invasive
D. Low mitotic rate
Correct answer: B
Rationale: Malignant cells exhibit anaplasia (loss of differentiation),
pleomorphism (variation in size and shape), increased nuclear-tocytoplasmic
ratio, and a high mitotic rate. Benign tumors are welldifferentiated,
encapsulated, and non-invasive.
