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NR507 Week 8 Final Exam 2026 NR 507 Advanced
Pathophysiology Complete Question 1-100
(Actual Exam Proctored via Examplify) With
Correct Answers | 100% Pass Guaranteed |
Graded A+
Cellular Processes & Genetics
Q1. Which term describes the body's ability to maintain a stable internal environment despite
external changes?
A. Ischemia
B. Homeostasis
C. Necrosis
D. Atrophy
Correct Answer: B. Homeostasis
Rationale: Homeostasis refers to the dynamic processes that maintain a stable internal environment.
Ischemia (reduced blood flow) and necrosis (cell death) represent failures of homeostasis, while atrophy
is a reduction in cell size. Disease often represents a breakdown of homeostatic mechanisms.
Q2. What is the most common cause of cellular injury leading to ATP depletion and failure of sodium-
potassium pumps?
A. Free radical formation
B. Hypoxia
C. Chemical toxicity
D. Accumulation of calcium
Correct Answer: B. Hypoxia
Rationale: Hypoxia, or inadequate oxygen delivery to tissues, is the most common mechanism of
cellular injury. It leads to ATP depletion, failure of sodium-potassium pumps, cellular swelling, and
ultimately cell death if uncorrected. This pathway is key to understanding conditions like myocardial
infarction, stroke, and shock.
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Q3. Which type of cellular adaptation is characterized by an increase in cell SIZE, often resulting from
increased workload?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy
Rationale: Hypertrophy specifically refers to an increase in the size of individual cells, leading to
enlargement of the organ or tissue. It is commonly seen in skeletal muscle (weightlifting) and cardiac
muscle (hypertension-induced left ventricular hypertrophy). Hyperplasia is an increase in cell NUMBER,
while metaplasia is a change from one mature cell type to another.
Q4. Down syndrome is characterized by which chromosomal abnormality?
A. Monosomy of chromosome 21
B. Trisomy 21
C. Deletion of chromosome 5
D. Translocation of chromosome 18
Correct Answer: B. Trisomy 21
Rationale: Down syndrome (Trisomy 21) results from an extra copy of chromosome 21. Risk factors
include advanced maternal age. Characteristics include flat facies, simian crease, gap between first two
toes, and intellectual disability.
Inflammation, Immunity & Hypersensitivity
Q5. Which immunoglobulin is most associated with Type I hypersensitivity reactions (immediate
allergic reactions)?
A. IgA
B. IgD
C. IgE
D. IgG
Correct Answer: C. IgE
Rationale: IgE binds to mast cells and basophils via FcεRI receptors. Upon re-exposure to an allergen,
cross-linking triggers mast cell degranulation and histamine release, causing immediate hypersensitivity
reactions such as anaphylaxis, hay fever, and asthma.
, 3
Q6. A patient develops hypotension, bronchospasm, and urticaria immediately after receiving
contrast dye. Which hypersensitivity type is involved?
A. Type I (Immediate)
B. Type II (Cytotoxic)
C. Type III (Immune complex)
D. Type IV (Delayed)
Correct Answer: A. Type I (Immediate)
Rationale: This presentation represents an IgE-mediated anaphylactic reaction. Type I hypersensitivity is
characterized by immediate systemic reactions including hypotension, bronchospasm, and urticaria due
to mast cell degranulation and release of histamine and other mediators.
Q7. What is the underlying pathophysiology of myasthenia gravis?
A. Destruction of the myelin sheath
B. Autoimmune blockade or destruction of acetylcholine receptors
C. Deficiency of dopamine in the basal ganglia
D. Inflammation of the meninges
Correct Answer: B. Autoimmune blockade or destruction of acetylcholine receptors
Rationale: Myasthenia gravis is an autoimmune disorder affecting the neuromuscular junction, where
antibodies block or destroy acetylcholine receptors, preventing nerve impulses from triggering muscle
contractions. This results in fluctuating muscle weakness that worsens with activity.
Cardiovascular Pathophysiology
Q8. A 62-year-old with chronic obstructive pulmonary disease (COPD) develops cor pulmonale. What
is the primary mechanism leading to right heart failure in this patient?
A. Left ventricular systolic dysfunction
B. Pulmonary hypertension secondary to hypoxic vasoconstriction
C. Increased left atrial pressure from mitral stenosis
D. Systemic hypertension causing afterload mismatch
Correct Answer: B. Pulmonary hypertension secondary to hypoxic vasoconstriction
NR507 Week 8 Final Exam 2026 NR 507 Advanced
Pathophysiology Complete Question 1-100
(Actual Exam Proctored via Examplify) With
Correct Answers | 100% Pass Guaranteed |
Graded A+
Cellular Processes & Genetics
Q1. Which term describes the body's ability to maintain a stable internal environment despite
external changes?
A. Ischemia
B. Homeostasis
C. Necrosis
D. Atrophy
Correct Answer: B. Homeostasis
Rationale: Homeostasis refers to the dynamic processes that maintain a stable internal environment.
Ischemia (reduced blood flow) and necrosis (cell death) represent failures of homeostasis, while atrophy
is a reduction in cell size. Disease often represents a breakdown of homeostatic mechanisms.
Q2. What is the most common cause of cellular injury leading to ATP depletion and failure of sodium-
potassium pumps?
A. Free radical formation
B. Hypoxia
C. Chemical toxicity
D. Accumulation of calcium
Correct Answer: B. Hypoxia
Rationale: Hypoxia, or inadequate oxygen delivery to tissues, is the most common mechanism of
cellular injury. It leads to ATP depletion, failure of sodium-potassium pumps, cellular swelling, and
ultimately cell death if uncorrected. This pathway is key to understanding conditions like myocardial
infarction, stroke, and shock.
,2
Q3. Which type of cellular adaptation is characterized by an increase in cell SIZE, often resulting from
increased workload?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy
Rationale: Hypertrophy specifically refers to an increase in the size of individual cells, leading to
enlargement of the organ or tissue. It is commonly seen in skeletal muscle (weightlifting) and cardiac
muscle (hypertension-induced left ventricular hypertrophy). Hyperplasia is an increase in cell NUMBER,
while metaplasia is a change from one mature cell type to another.
Q4. Down syndrome is characterized by which chromosomal abnormality?
A. Monosomy of chromosome 21
B. Trisomy 21
C. Deletion of chromosome 5
D. Translocation of chromosome 18
Correct Answer: B. Trisomy 21
Rationale: Down syndrome (Trisomy 21) results from an extra copy of chromosome 21. Risk factors
include advanced maternal age. Characteristics include flat facies, simian crease, gap between first two
toes, and intellectual disability.
Inflammation, Immunity & Hypersensitivity
Q5. Which immunoglobulin is most associated with Type I hypersensitivity reactions (immediate
allergic reactions)?
A. IgA
B. IgD
C. IgE
D. IgG
Correct Answer: C. IgE
Rationale: IgE binds to mast cells and basophils via FcεRI receptors. Upon re-exposure to an allergen,
cross-linking triggers mast cell degranulation and histamine release, causing immediate hypersensitivity
reactions such as anaphylaxis, hay fever, and asthma.
, 3
Q6. A patient develops hypotension, bronchospasm, and urticaria immediately after receiving
contrast dye. Which hypersensitivity type is involved?
A. Type I (Immediate)
B. Type II (Cytotoxic)
C. Type III (Immune complex)
D. Type IV (Delayed)
Correct Answer: A. Type I (Immediate)
Rationale: This presentation represents an IgE-mediated anaphylactic reaction. Type I hypersensitivity is
characterized by immediate systemic reactions including hypotension, bronchospasm, and urticaria due
to mast cell degranulation and release of histamine and other mediators.
Q7. What is the underlying pathophysiology of myasthenia gravis?
A. Destruction of the myelin sheath
B. Autoimmune blockade or destruction of acetylcholine receptors
C. Deficiency of dopamine in the basal ganglia
D. Inflammation of the meninges
Correct Answer: B. Autoimmune blockade or destruction of acetylcholine receptors
Rationale: Myasthenia gravis is an autoimmune disorder affecting the neuromuscular junction, where
antibodies block or destroy acetylcholine receptors, preventing nerve impulses from triggering muscle
contractions. This results in fluctuating muscle weakness that worsens with activity.
Cardiovascular Pathophysiology
Q8. A 62-year-old with chronic obstructive pulmonary disease (COPD) develops cor pulmonale. What
is the primary mechanism leading to right heart failure in this patient?
A. Left ventricular systolic dysfunction
B. Pulmonary hypertension secondary to hypoxic vasoconstriction
C. Increased left atrial pressure from mitral stenosis
D. Systemic hypertension causing afterload mismatch
Correct Answer: B. Pulmonary hypertension secondary to hypoxic vasoconstriction
