NURS 6501 Exam 1 V1 | NURS 6501 Advanced Pathophysiology |
Actual Q&A with Rationale (NURS 6501 Exam 1) | Walden
1. Mr. Henderson, a 68-year-old male with a 40-pack-year history of cigarette smoking,
undergoes a bronchial biopsy. The pathology report reveals that the normal ciliated columnar
epithelial cells have been replaced by stratified squamous epithelial cells. This process is best
described as:
A. Dysplasia
B. Metaplasia
C. Hyperplasia
D. Anaplasia
Answer: B
Rationale: Metaplasia is the reversible replacement of one mature cell type by another,
often less differentiated, cell type in response to chronic irritation. In smokers, the delicate
ciliated columnar cells of the airway are replaced by tougher stratified squamous cells to
survive the smoke exposure. However, this adaptation results in the loss of vital functions
like mucus secretion and ciliary clearance.
2. A 52-year-old female, Ms. Garcia, is admitted to the emergency department with severe
chest pain and diaphoresis. An EKG confirms an acute myocardial infarction. At the cellular
level, the lack of oxygen leads to a decrease in ATP production. What is the immediate
consequence of ATP depletion in her cardiac myocytes?
A. Efflux of sodium and influx of potassium
B. Increased intracellular pH
C. Failure of the sodium-potassium pump
D. Decreased osmotic pressure within the cell
Answer: C
Rationale: ATP is required to power the Na+/K+ ATPase pump, which maintains the
electrochemical gradient of the cell. When ATP levels drop during ischemia, the pump fails,
causing sodium to accumulate inside the cell and potassium to leak out. The increase in
intracellular sodium creates an osmotic gradient that pulls water into the cell, leading to
acute cellular swelling.
3. During a routine check-up, a 30-year-old male, James, is found to have an enlarged heart
on a chest X-ray. He is a competitive weightlifter who trains daily. The increase in the size of
his left ventricle is likely due to which cellular adaptation?
A. Pathologic hypertrophy
,B. Physiologic hypertrophy
C. Compensatory hyperplasia
D. Hormonal hyperplasia
Answer: B
Rationale: Hypertrophy is an increase in the size of cells, resulting in an increase in the
size of the organ. In a weightlifter or athlete, this is a physiologic adaptation to increased
mechanical demand and workload. Unlike pathologic hypertrophy seen in hypertension,
physiologic hypertrophy is generally reversible and associated with normal or enhanced
cardiac function.
4. A 4-year-old child, Liam, is evaluated for failure to thrive and recurrent respiratory
infections. Genetic testing reveals a mutation in the CFTR gene, leading to Cystic Fibrosis. This
condition follows an autosomal recessive inheritance pattern. What are the chances that a
sibling of Liam will also have the disease if both parents are carriers?
A. 100%
B. 50%
C. 75%
D. 25%
Answer: D
Rationale: In autosomal recessive inheritance, an individual must inherit two copies of the
mutated gene (one from each parent) to manifest the disease. When both parents are
carriers (heterozygous), each pregnancy has a 25% chance of resulting in an affected child
(homozygous recessive). There is also a 50% chance the child will be a carrier and a 25%
chance the child will be unaffected and not a carrier.
5. Ms. Thompson, a 72-year-old patient with end-stage renal disease, presents with a serum
potassium level of 6.8 mEq/L. The nurse practitioner monitors the EKG closely for which of
the following characteristic changes associated with this electrolyte imbalance?
A. Tall, peaked T waves
B. Prominent U waves
C. ST-segment depression
D. Prolonged QT interval
Answer: A
Rationale: Hyperkalemia, defined as a serum potassium level above 5.0 mEq/L, alters the
resting membrane potential of cardiac cells. The most early and classic EKG change is the
appearance of tall, peaked T waves due to faster repolarization. As levels increase further,
, the QRS complex widens, and the P wave may disappear, eventually leading to ventricular
fibrillation or asystole.
6. A 45-year-old male, Mr. Miller, has been diagnosed with alcoholic liver disease. He
presents with significant abdominal swelling (ascites). Which of the following
pathophysiologic mechanisms primarily contributes to the development of his edema?
A. Increased capillary hydrostatic pressure
B. Increased interstitial oncotic pressure
C. Decreased capillary oncotic pressure
D. Lymphatic obstruction
Answer: C
Rationale: The liver is responsible for synthesizing albumin, the primary protein
responsible for maintaining capillary oncotic (colloid) pressure. In liver failure, albumin
production decreases, which reduces the osmotic force that normally keeps fluid within the
vascular space. Consequently, fluid leaks into the interstitial space and the peritoneal
cavity, resulting in ascites.
7. A 19-year-old college student, Sarah, develops a severe allergic reaction after eating a
peanut butter cookie. She exhibits wheezing, urticaria, and hypotension. Which antibody is
primarily responsible for this Type I hypersensitivity reaction?
A. IgG
B. IgM
C. IgE
D. IgA
Answer: C
Rationale: Type I hypersensitivity is an immediate allergic reaction mediated by IgE
antibodies. Upon re-exposure to an allergen, IgE bound to mast cells triggers the release of
inflammatory mediators like histamine. These mediators cause vasodilation, increased
capillary permeability, and smooth muscle contraction, leading to the clinical signs of
anaphylaxis.
8. Which of the following describes the cellular process where a cell programs itself to die in
an orderly fashion without triggering an inflammatory response, as seen during
embryogenesis?
A. Necrosis
B. Autophagy
C. Infarction
Actual Q&A with Rationale (NURS 6501 Exam 1) | Walden
1. Mr. Henderson, a 68-year-old male with a 40-pack-year history of cigarette smoking,
undergoes a bronchial biopsy. The pathology report reveals that the normal ciliated columnar
epithelial cells have been replaced by stratified squamous epithelial cells. This process is best
described as:
A. Dysplasia
B. Metaplasia
C. Hyperplasia
D. Anaplasia
Answer: B
Rationale: Metaplasia is the reversible replacement of one mature cell type by another,
often less differentiated, cell type in response to chronic irritation. In smokers, the delicate
ciliated columnar cells of the airway are replaced by tougher stratified squamous cells to
survive the smoke exposure. However, this adaptation results in the loss of vital functions
like mucus secretion and ciliary clearance.
2. A 52-year-old female, Ms. Garcia, is admitted to the emergency department with severe
chest pain and diaphoresis. An EKG confirms an acute myocardial infarction. At the cellular
level, the lack of oxygen leads to a decrease in ATP production. What is the immediate
consequence of ATP depletion in her cardiac myocytes?
A. Efflux of sodium and influx of potassium
B. Increased intracellular pH
C. Failure of the sodium-potassium pump
D. Decreased osmotic pressure within the cell
Answer: C
Rationale: ATP is required to power the Na+/K+ ATPase pump, which maintains the
electrochemical gradient of the cell. When ATP levels drop during ischemia, the pump fails,
causing sodium to accumulate inside the cell and potassium to leak out. The increase in
intracellular sodium creates an osmotic gradient that pulls water into the cell, leading to
acute cellular swelling.
3. During a routine check-up, a 30-year-old male, James, is found to have an enlarged heart
on a chest X-ray. He is a competitive weightlifter who trains daily. The increase in the size of
his left ventricle is likely due to which cellular adaptation?
A. Pathologic hypertrophy
,B. Physiologic hypertrophy
C. Compensatory hyperplasia
D. Hormonal hyperplasia
Answer: B
Rationale: Hypertrophy is an increase in the size of cells, resulting in an increase in the
size of the organ. In a weightlifter or athlete, this is a physiologic adaptation to increased
mechanical demand and workload. Unlike pathologic hypertrophy seen in hypertension,
physiologic hypertrophy is generally reversible and associated with normal or enhanced
cardiac function.
4. A 4-year-old child, Liam, is evaluated for failure to thrive and recurrent respiratory
infections. Genetic testing reveals a mutation in the CFTR gene, leading to Cystic Fibrosis. This
condition follows an autosomal recessive inheritance pattern. What are the chances that a
sibling of Liam will also have the disease if both parents are carriers?
A. 100%
B. 50%
C. 75%
D. 25%
Answer: D
Rationale: In autosomal recessive inheritance, an individual must inherit two copies of the
mutated gene (one from each parent) to manifest the disease. When both parents are
carriers (heterozygous), each pregnancy has a 25% chance of resulting in an affected child
(homozygous recessive). There is also a 50% chance the child will be a carrier and a 25%
chance the child will be unaffected and not a carrier.
5. Ms. Thompson, a 72-year-old patient with end-stage renal disease, presents with a serum
potassium level of 6.8 mEq/L. The nurse practitioner monitors the EKG closely for which of
the following characteristic changes associated with this electrolyte imbalance?
A. Tall, peaked T waves
B. Prominent U waves
C. ST-segment depression
D. Prolonged QT interval
Answer: A
Rationale: Hyperkalemia, defined as a serum potassium level above 5.0 mEq/L, alters the
resting membrane potential of cardiac cells. The most early and classic EKG change is the
appearance of tall, peaked T waves due to faster repolarization. As levels increase further,
, the QRS complex widens, and the P wave may disappear, eventually leading to ventricular
fibrillation or asystole.
6. A 45-year-old male, Mr. Miller, has been diagnosed with alcoholic liver disease. He
presents with significant abdominal swelling (ascites). Which of the following
pathophysiologic mechanisms primarily contributes to the development of his edema?
A. Increased capillary hydrostatic pressure
B. Increased interstitial oncotic pressure
C. Decreased capillary oncotic pressure
D. Lymphatic obstruction
Answer: C
Rationale: The liver is responsible for synthesizing albumin, the primary protein
responsible for maintaining capillary oncotic (colloid) pressure. In liver failure, albumin
production decreases, which reduces the osmotic force that normally keeps fluid within the
vascular space. Consequently, fluid leaks into the interstitial space and the peritoneal
cavity, resulting in ascites.
7. A 19-year-old college student, Sarah, develops a severe allergic reaction after eating a
peanut butter cookie. She exhibits wheezing, urticaria, and hypotension. Which antibody is
primarily responsible for this Type I hypersensitivity reaction?
A. IgG
B. IgM
C. IgE
D. IgA
Answer: C
Rationale: Type I hypersensitivity is an immediate allergic reaction mediated by IgE
antibodies. Upon re-exposure to an allergen, IgE bound to mast cells triggers the release of
inflammatory mediators like histamine. These mediators cause vasodilation, increased
capillary permeability, and smooth muscle contraction, leading to the clinical signs of
anaphylaxis.
8. Which of the following describes the cellular process where a cell programs itself to die in
an orderly fashion without triggering an inflammatory response, as seen during
embryogenesis?
A. Necrosis
B. Autophagy
C. Infarction
