NURS 6501 Advanced Pathophysiology Exam Practice Test
Bank | Walden University Actual Questions & Verified Clinical
Rationales
Ace your high-stakes graduate nursing milestones with this comprehensive NURS 6501
Advanced Pathophysiology master practice test bank tailored specifically for Walden
University. Master high-yield MSN and FNP clinical domains, including cellular
adaptation mechanics, genetic inheritance anomalies, multi-system fluid shifts,
neoplastic transformations, and organ-system pathophysiology. Every verified
question features an evidence-based clinical rationale to sharpen your diagnostic
reasoning skills, elevate your clinical decision-making, and guarantee exam success.
Section 1: Cellular & Genetic Pathophysiology (Questions 1–
40)
1. A runner has depleted all the oxygen available for muscle energy. Which of the
following will facilitate his continued muscle performance?
A. Aerobic glycolysis
B. Anaerobic glycolysis
C. Gluconeogenesis
D. Lipolysis
B. Anaerobic glycolysis
Anaerobic glycolysis breaks down glucose without oxygen, producing ATP and lactic acid
to sustain muscle activity during high-intensity exercise when oxygen is limited. This
,process yields only 2 ATP per glucose molecule but provides rapid energy for short bursts
of activity .
2. What causes the rapid change in the resting membrane potential that initiates
an action potential?
A. Potassium channels open, and potassium exits the cell
B. Chloride gates open, and chloride enters the cell
C. Sodium gates open, and sodium rushes into the cell
D. Calcium channels open, and calcium enters the cell
C. Sodium gates open, and sodium rushes into the cell
Once threshold potential is reached, voltage-gated Na⁺ channels open, sodium rushes into
the cell, and membrane potential rapidly moves from negative to positive—this is the
depolarization phase of the action potential .
3. A 12-year-old male is diagnosed with Klinefelter syndrome. His karyotype
would reveal which of the following?
A. XXY
B. XYY
C. Turner syndrome (XO)
D. Trisomy 21
A. XXY
Klinefelter syndrome is a genetic condition where a male has an extra X chromosome
(47,XXY), leading to hypogonadism, infertility, and gynecomastia .
4. A nurse is reviewing the pedigree chart. When checking for a proband, what is
the nurse looking for?
,A. The youngest person with the disease
B. The person who is first diagnosed with a genetic disease
C. The person with the most severe symptoms
D. The parent who transmitted the disease
B. The person who is first diagnosed with a genetic disease
The proband is the affected individual through whom a family with a genetic disorder is
first ascertained; they are the index case for genetic studies .
5. An aide asks the nurse why people who have neurofibromatosis will show
varying degrees of the disease. Which genetic principle should the nurse explain to
the aide?
A. Penetrance
B. Expressivity
C. Pleiotropy
D. Genetic heterogeneity
B. Expressivity
Expressivity refers to the degree to which a trait is expressed. Neurofibromatosis has
variable expressivity, meaning its severity can differ among affected individuals, even
within the same family .
6. When a patient asks what causes cystic fibrosis, how should the nurse respond?
Cystic fibrosis is caused by a(n) _____ gene.
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. Mitochondrial
B. Autosomal recessive
, Cystic fibrosis is an autosomal recessive disorder; both parents must pass on a defective
copy of the CFTR gene for the child to develop the disease .
7. How are potassium and sodium transported across plasma membranes?
A. By simple diffusion
B. By adenosine triphosphate enzyme (ATPase)
C. By facilitated diffusion
D. By osmosis
B. By adenosine triphosphate enzyme (ATPase)
The Na⁺/K⁺ ATPase pump actively transports three sodium ions out of the cell and two
potassium ions into the cell, using energy from ATP to maintain the resting membrane
potential .
8. The nurse would be correct in identifying the predominant extracellular cation
as:
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
A. Sodium
Sodium (Na⁺) is the main cation outside cells, essential for fluid balance, nerve impulse
transmission, and muscle contraction .
9. The early dilation (swelling) of the cell's endoplasmic reticulum results in:
A. Increased protein synthesis
B. Reduced protein synthesis
Bank | Walden University Actual Questions & Verified Clinical
Rationales
Ace your high-stakes graduate nursing milestones with this comprehensive NURS 6501
Advanced Pathophysiology master practice test bank tailored specifically for Walden
University. Master high-yield MSN and FNP clinical domains, including cellular
adaptation mechanics, genetic inheritance anomalies, multi-system fluid shifts,
neoplastic transformations, and organ-system pathophysiology. Every verified
question features an evidence-based clinical rationale to sharpen your diagnostic
reasoning skills, elevate your clinical decision-making, and guarantee exam success.
Section 1: Cellular & Genetic Pathophysiology (Questions 1–
40)
1. A runner has depleted all the oxygen available for muscle energy. Which of the
following will facilitate his continued muscle performance?
A. Aerobic glycolysis
B. Anaerobic glycolysis
C. Gluconeogenesis
D. Lipolysis
B. Anaerobic glycolysis
Anaerobic glycolysis breaks down glucose without oxygen, producing ATP and lactic acid
to sustain muscle activity during high-intensity exercise when oxygen is limited. This
,process yields only 2 ATP per glucose molecule but provides rapid energy for short bursts
of activity .
2. What causes the rapid change in the resting membrane potential that initiates
an action potential?
A. Potassium channels open, and potassium exits the cell
B. Chloride gates open, and chloride enters the cell
C. Sodium gates open, and sodium rushes into the cell
D. Calcium channels open, and calcium enters the cell
C. Sodium gates open, and sodium rushes into the cell
Once threshold potential is reached, voltage-gated Na⁺ channels open, sodium rushes into
the cell, and membrane potential rapidly moves from negative to positive—this is the
depolarization phase of the action potential .
3. A 12-year-old male is diagnosed with Klinefelter syndrome. His karyotype
would reveal which of the following?
A. XXY
B. XYY
C. Turner syndrome (XO)
D. Trisomy 21
A. XXY
Klinefelter syndrome is a genetic condition where a male has an extra X chromosome
(47,XXY), leading to hypogonadism, infertility, and gynecomastia .
4. A nurse is reviewing the pedigree chart. When checking for a proband, what is
the nurse looking for?
,A. The youngest person with the disease
B. The person who is first diagnosed with a genetic disease
C. The person with the most severe symptoms
D. The parent who transmitted the disease
B. The person who is first diagnosed with a genetic disease
The proband is the affected individual through whom a family with a genetic disorder is
first ascertained; they are the index case for genetic studies .
5. An aide asks the nurse why people who have neurofibromatosis will show
varying degrees of the disease. Which genetic principle should the nurse explain to
the aide?
A. Penetrance
B. Expressivity
C. Pleiotropy
D. Genetic heterogeneity
B. Expressivity
Expressivity refers to the degree to which a trait is expressed. Neurofibromatosis has
variable expressivity, meaning its severity can differ among affected individuals, even
within the same family .
6. When a patient asks what causes cystic fibrosis, how should the nurse respond?
Cystic fibrosis is caused by a(n) _____ gene.
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. Mitochondrial
B. Autosomal recessive
, Cystic fibrosis is an autosomal recessive disorder; both parents must pass on a defective
copy of the CFTR gene for the child to develop the disease .
7. How are potassium and sodium transported across plasma membranes?
A. By simple diffusion
B. By adenosine triphosphate enzyme (ATPase)
C. By facilitated diffusion
D. By osmosis
B. By adenosine triphosphate enzyme (ATPase)
The Na⁺/K⁺ ATPase pump actively transports three sodium ions out of the cell and two
potassium ions into the cell, using energy from ATP to maintain the resting membrane
potential .
8. The nurse would be correct in identifying the predominant extracellular cation
as:
A. Sodium
B. Potassium
C. Calcium
D. Magnesium
A. Sodium
Sodium (Na⁺) is the main cation outside cells, essential for fluid balance, nerve impulse
transmission, and muscle contraction .
9. The early dilation (swelling) of the cell's endoplasmic reticulum results in:
A. Increased protein synthesis
B. Reduced protein synthesis
