NSG 3113 PATHOPHYSIOLOGY EXAM 1– SOUTH COLLEGE:
COMPREHENSIVE 200-QUESTION STUDY GUIDE WITH DETAILED
RATIONALES ON CELLULAR ADAPTATION (ATROPHY, HYPERTROPHY,
METAPLASIA), CELLULAR INJURY (HYPOXIC, UV RADIATION,
FROSTBITE), AND TOXICOLOGICAL PATHOPHYSIOLOGY (LEAD,
MERCURY, ACETAMINOPHEN TOXICITY).
1. A nurse is reviewing the lab results of a child who ingested toy
figurines containing lead. Based on the pathophysiological effects of
lead toxicity, which blood test should the care team prioritize to assess
for hematologic effects?
A. White blood cell (WBC) count
B. Red blood cell (RBC) levels
C. Platelet count
D. Eosinophil count
Correct Answer: B
Rationale: Lead toxicity interferes with heme synthesis, leading to
anemia. The provided source material explicitly lists Red blood cell
(RBC) levels as the priority blood test in this scenario to evaluate the
hematologic impact.
2. A homeless man is assessed during a night with a wind chill of -10°F.
The nurse observes blanching and numbness in his fingers and toes.
Which type of cellular injury is primarily occurring due to the cold
exposure?
A. Hypoxic
B. Chemical
,C. Infectious
D. Immunologic
Correct Answer: A
Rationale: Cold exposure causes vasoconstriction, leading to decreased
blood flow and oxygen delivery to the tissues, resulting in hypoxic
cellular injury. The source specifically identifies hypoxic injury in the
context of frostbite assessment.
3. A nurse is teaching a class about ultraviolet (UV) radiation. Which
statement accurately describes the primary pathophysiological risk
associated with UV exposure?
A. It primarily causes thermal burns to the epidermis.
B. It increases the risk of skin cancer and damages DNA.
C. It stimulates excessive melanin production leading to systemic
toxicity.
D. It causes immediate necrosis of subcutaneous fat.
Correct Answer: B
Rationale: Ultraviolet radiation directly damages cellular DNA, which
can lead to mutations and increase the risk of developing skin cancer.
This is the core concept included in the health promotion class.
4. A teenager asks why the muscle in their arm is smaller after a cast is
removed. The provider explains this reduction is caused by which
pathophysiological process?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C
,Rationale: Disuse atrophy occurs when muscle mass decreases due to
immobility or lack of use, such as when an arm is immobilized in a cast.
5. A nurse explains to a hypertensive client that the increased
workload required to pump blood against elevated arterial pressure
results in a progressive increase in left ventricular muscle mass. This is
an example of:
A. Physiologic atrophy
B. Pathologic hypertrophy
C. Compensatory metaplasia
D. Hyperplastic dysplasia
Correct Answer: B
Rationale: Pathologic hypertrophy occurs as a result of disease
conditions, such as hypertension, where the heart muscle thickens
adaptively to overcome increased resistance.
6. A mother rushes her 4-year-old child to the emergency department
after finding an empty Tylenol bottle. The nurse explains that inducing
vomiting is crucial to prevent which severe outcome?
A. Renal failure
B. Liver failure
C. Cardiac arrest
D. Respiratory depression
Correct Answer: B
Rationale: Acetaminophen (Tylenol) toxicity primarily affects the liver,
leading to severe hepatic necrosis and liver failure if not treated
promptly. Inducing vomiting prevents further absorption.
7. A nurse is discussing the primary source of mercury poisoning
today. Which source should the nurse identify as the most significant?
, A. Thermometers
B. Dental amalgams
C. Fish such as tuna and swordfish
D. Industrial waste in drinking water
Correct Answer: C
Rationale: The primary source of mercury poisoning today is the
consumption of contaminated fish, particularly large predatory fish like
tuna and swordfish, which accumulate methylmercury.
8. Which statement best describes metaplasia to a client receiving lab
findings?
A. "This is a change in cell form as it adapts to increased work demands
or threats to survival."
B. "This is an increase in the number of cells in an organ."
C. "This is a decrease in cell size due to decreased workload."
D. "This is a disorganized arrangement of cells indicating malignancy."
Correct Answer: A
Rationale: Metaplasia is a reversible change in which one adult cell type
is replaced by another adult cell type that is better able to survive
adverse environmental conditions.
9. A nurse is teaching a client about the effects of cold exposure on
the blood. Which statement accurately reflects the pathophysiological
changes?
A. Cold decreases blood viscosity and promotes vasodilation.
B. Cold increases blood viscosity and thrombosis.
C. Cold decreases peripheral resistance and increases bleeding risk.
D. Cold causes immediate hemolysis and anemia.
Correct Answer: B
Rationale: Cold exposure causes peripheral vasoconstriction, which
COMPREHENSIVE 200-QUESTION STUDY GUIDE WITH DETAILED
RATIONALES ON CELLULAR ADAPTATION (ATROPHY, HYPERTROPHY,
METAPLASIA), CELLULAR INJURY (HYPOXIC, UV RADIATION,
FROSTBITE), AND TOXICOLOGICAL PATHOPHYSIOLOGY (LEAD,
MERCURY, ACETAMINOPHEN TOXICITY).
1. A nurse is reviewing the lab results of a child who ingested toy
figurines containing lead. Based on the pathophysiological effects of
lead toxicity, which blood test should the care team prioritize to assess
for hematologic effects?
A. White blood cell (WBC) count
B. Red blood cell (RBC) levels
C. Platelet count
D. Eosinophil count
Correct Answer: B
Rationale: Lead toxicity interferes with heme synthesis, leading to
anemia. The provided source material explicitly lists Red blood cell
(RBC) levels as the priority blood test in this scenario to evaluate the
hematologic impact.
2. A homeless man is assessed during a night with a wind chill of -10°F.
The nurse observes blanching and numbness in his fingers and toes.
Which type of cellular injury is primarily occurring due to the cold
exposure?
A. Hypoxic
B. Chemical
,C. Infectious
D. Immunologic
Correct Answer: A
Rationale: Cold exposure causes vasoconstriction, leading to decreased
blood flow and oxygen delivery to the tissues, resulting in hypoxic
cellular injury. The source specifically identifies hypoxic injury in the
context of frostbite assessment.
3. A nurse is teaching a class about ultraviolet (UV) radiation. Which
statement accurately describes the primary pathophysiological risk
associated with UV exposure?
A. It primarily causes thermal burns to the epidermis.
B. It increases the risk of skin cancer and damages DNA.
C. It stimulates excessive melanin production leading to systemic
toxicity.
D. It causes immediate necrosis of subcutaneous fat.
Correct Answer: B
Rationale: Ultraviolet radiation directly damages cellular DNA, which
can lead to mutations and increase the risk of developing skin cancer.
This is the core concept included in the health promotion class.
4. A teenager asks why the muscle in their arm is smaller after a cast is
removed. The provider explains this reduction is caused by which
pathophysiological process?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C
,Rationale: Disuse atrophy occurs when muscle mass decreases due to
immobility or lack of use, such as when an arm is immobilized in a cast.
5. A nurse explains to a hypertensive client that the increased
workload required to pump blood against elevated arterial pressure
results in a progressive increase in left ventricular muscle mass. This is
an example of:
A. Physiologic atrophy
B. Pathologic hypertrophy
C. Compensatory metaplasia
D. Hyperplastic dysplasia
Correct Answer: B
Rationale: Pathologic hypertrophy occurs as a result of disease
conditions, such as hypertension, where the heart muscle thickens
adaptively to overcome increased resistance.
6. A mother rushes her 4-year-old child to the emergency department
after finding an empty Tylenol bottle. The nurse explains that inducing
vomiting is crucial to prevent which severe outcome?
A. Renal failure
B. Liver failure
C. Cardiac arrest
D. Respiratory depression
Correct Answer: B
Rationale: Acetaminophen (Tylenol) toxicity primarily affects the liver,
leading to severe hepatic necrosis and liver failure if not treated
promptly. Inducing vomiting prevents further absorption.
7. A nurse is discussing the primary source of mercury poisoning
today. Which source should the nurse identify as the most significant?
, A. Thermometers
B. Dental amalgams
C. Fish such as tuna and swordfish
D. Industrial waste in drinking water
Correct Answer: C
Rationale: The primary source of mercury poisoning today is the
consumption of contaminated fish, particularly large predatory fish like
tuna and swordfish, which accumulate methylmercury.
8. Which statement best describes metaplasia to a client receiving lab
findings?
A. "This is a change in cell form as it adapts to increased work demands
or threats to survival."
B. "This is an increase in the number of cells in an organ."
C. "This is a decrease in cell size due to decreased workload."
D. "This is a disorganized arrangement of cells indicating malignancy."
Correct Answer: A
Rationale: Metaplasia is a reversible change in which one adult cell type
is replaced by another adult cell type that is better able to survive
adverse environmental conditions.
9. A nurse is teaching a client about the effects of cold exposure on
the blood. Which statement accurately reflects the pathophysiological
changes?
A. Cold decreases blood viscosity and promotes vasodilation.
B. Cold increases blood viscosity and thrombosis.
C. Cold decreases peripheral resistance and increases bleeding risk.
D. Cold causes immediate hemolysis and anemia.
Correct Answer: B
Rationale: Cold exposure causes peripheral vasoconstriction, which
