NURS 6501 ADVANCED PATHOPHYSIOLOGY
COMPREHENSIVE EXAM TEST BANK
200 QUESTIONS COVERING ALL EXAM TOPICS
1. A 55-year-old male with chronic kidney disease presents with fatigue and
pallor. Laboratory findings reveal hemoglobin of 9.8 g/dL, hematocrit of 29.5%,
MCV of 88 fL, serum ferritin of 450 ng/mL, and serum erythropoietin level of 12
mU/mL (normal 4-27). What is the most likely mechanism of his anemia?
A. Decreased erythropoietin production by damaged kidneys
B. Iron deficiency from chronic blood loss
C. Vitamin B12 deficiency from poor absorption
D. Bone marrow suppression from uremic toxins
Correct Answer: A
Rationale: In chronic kidney disease, the kidneys cannot produce adequate
erythropoietin, leading to normocytic normochromic anemia. The normal ferritin
level rules out iron deficiency, while the normocytic indices (MCV 88) rule out B12
deficiency as a primary cause. Erythropoietin levels should be elevated in
response to anemia, so a normal level represents inappropriately low production.
2. A 72-year-old male presents with progressive shortness of breath on exertion,
orthopnea, and paroxysmal nocturnal dyspnea. His past medical history includes
hypertension and myocardial infarction 5 years ago. On physical examination,
you note jugular venous distention, S3 gallop, and bilateral crackles on lung
auscultation. Which of the following is the most likely underlying
pathophysiology?
,A. Left ventricular diastolic dysfunction leading to pulmonary congestion
B. Right ventricular failure secondary to pulmonary hypertension
C. Pericardial constriction limiting ventricular filling
D. Valvular heart disease causing backward flow
Correct Answer: A
Rationale: This patient presents with classic signs and symptoms of left-sided
heart failure: orthopnea, PND, S3 gallop, JVD, and pulmonary crackles. The history
of hypertension and prior MI suggests ischemic cardiomyopathy with impaired left
ventricular function. The S3 gallop indicates decreased ventricular compliance and
increased filling pressures.
3. A 45-year-old female presents with progressive exertional dyspnea, fatigue,
and palpitations. Echocardiography reveals left ventricular ejection fraction of
55% but with concentric left ventricular hypertrophy. She has a history of
hypertension for 12 years. What is the primary pathophysiological mechanism
causing her symptoms?
A. Decreased cardiac output from reduced stroke volume
B. Impaired diastolic relaxation leading to elevated filling pressures
C. Mitral valve regurgitation from annular dilation
D. Pulmonary hypertension from left-sided pressure elevation
Correct Answer: B
Rationale: Concentric LV hypertrophy from chronic hypertension causes impaired
diastolic relaxation (diastolic dysfunction). Despite preserved ejection fraction, the
stiff ventricle cannot fill adequately, leading to elevated filling pressures, which
causes dyspnea and fatigue. While stroke volume may be affected, the primary
mechanism is diastolic dysfunction.
4. A 28-year-old African American female with a history of chronic anemia since
childhood presents with acute chest pain, fever, and dyspnea. Her hemoglobin is
,7.2 g/dL, and peripheral blood smear shows sickle-shaped erythrocytes. Which
of the following is the most likely trigger for her acute crisis?
A. Folic acid deficiency
B. Dehydration or infection
C. Iron supplementation
D. Vitamin B12 deficiency
Correct Answer: B
Rationale: Sickle cell disease crisis is often precipitated by conditions that increase
oxygen demand or cause dehydration, including infection, fever, and volume
depletion. These conditions promote hemoglobin S polymerization and
subsequent sickling. Folic acid deficiency can worsen anemia but is not the
primary trigger for acute crisis.
5. A 62-year-old male with a 40-pack-year smoking history presents with
hemoptysis, weight loss, and fatigue. Chest CT reveals a mass in the right upper
lobe with mediastinal lymphadenopathy. Laboratory studies show serum
sodium of 120 mEq/L and elevated antidiuretic hormone levels. What is the
most likely mechanism of his hyponatremia?
A. Adrenal insufficiency from metastatic disease
B. Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
C. Renal sodium wasting from chemotherapy
D. Excessive fluid intake from increased thirst
Correct Answer: B
Rationale: Small cell lung cancer can produce ectopic ADH, leading to SIADH. This
results in water retention, dilutional hyponatremia, and concentrated urine
despite low serum osmolality. The finding of elevated ADH in the presence of low
sodium confirms this mechanism.
, 6. A 50-year-old female presents with complaints of fatigue, cold intolerance,
and weight gain of 15 pounds over 6 months. Physical examination reveals dry
skin, periorbital edema, and delayed deep tendon reflexes. Laboratory studies
show TSH of 25 mIU/L (normal 0.5-5.0) and free T4 of 0.4 ng/dL (normal 0.8-
2.0). What is the most likely underlying pathology?
A. Pituitary adenoma producing excess TSH
B. Autoimmune destruction of the thyroid gland
C. Hypothalamic dysfunction reducing TRH release
D. Iodine deficiency reducing thyroid hormone synthesis
Correct Answer: B
Rationale: Primary hypothyroidism with elevated TSH and low free T4 typically
results from autoimmune destruction of the thyroid gland (Hashimoto's
thyroiditis). The TSH is appropriately elevated in response to low T4 levels, ruling
out pituitary or hypothalamic causes.
7. A 38-year-old male presents with palpitations, heat intolerance, and a 20-
pound weight loss over 3 months. Physical examination reveals exophthalmos,
thyroid bruit, and fine tremors. Laboratory studies show TSH <0.01 mIU/L and
free T4 of 3.8 ng/dL. Which of the following is the most likely diagnosis?
A. Graves' disease
B. Toxic multinodular goiter
C. Subacute thyroiditis
D. Pituitary adenoma
Correct Answer: A
Rationale: Graves' disease is the most common cause of hyperthyroidism and
presents with the classic triad of hyperthyroidism, ophthalmopathy, and thyroid
bruit from increased vascularity. The suppressed TSH with elevated free T4
confirms primary hyperthyroidism.
COMPREHENSIVE EXAM TEST BANK
200 QUESTIONS COVERING ALL EXAM TOPICS
1. A 55-year-old male with chronic kidney disease presents with fatigue and
pallor. Laboratory findings reveal hemoglobin of 9.8 g/dL, hematocrit of 29.5%,
MCV of 88 fL, serum ferritin of 450 ng/mL, and serum erythropoietin level of 12
mU/mL (normal 4-27). What is the most likely mechanism of his anemia?
A. Decreased erythropoietin production by damaged kidneys
B. Iron deficiency from chronic blood loss
C. Vitamin B12 deficiency from poor absorption
D. Bone marrow suppression from uremic toxins
Correct Answer: A
Rationale: In chronic kidney disease, the kidneys cannot produce adequate
erythropoietin, leading to normocytic normochromic anemia. The normal ferritin
level rules out iron deficiency, while the normocytic indices (MCV 88) rule out B12
deficiency as a primary cause. Erythropoietin levels should be elevated in
response to anemia, so a normal level represents inappropriately low production.
2. A 72-year-old male presents with progressive shortness of breath on exertion,
orthopnea, and paroxysmal nocturnal dyspnea. His past medical history includes
hypertension and myocardial infarction 5 years ago. On physical examination,
you note jugular venous distention, S3 gallop, and bilateral crackles on lung
auscultation. Which of the following is the most likely underlying
pathophysiology?
,A. Left ventricular diastolic dysfunction leading to pulmonary congestion
B. Right ventricular failure secondary to pulmonary hypertension
C. Pericardial constriction limiting ventricular filling
D. Valvular heart disease causing backward flow
Correct Answer: A
Rationale: This patient presents with classic signs and symptoms of left-sided
heart failure: orthopnea, PND, S3 gallop, JVD, and pulmonary crackles. The history
of hypertension and prior MI suggests ischemic cardiomyopathy with impaired left
ventricular function. The S3 gallop indicates decreased ventricular compliance and
increased filling pressures.
3. A 45-year-old female presents with progressive exertional dyspnea, fatigue,
and palpitations. Echocardiography reveals left ventricular ejection fraction of
55% but with concentric left ventricular hypertrophy. She has a history of
hypertension for 12 years. What is the primary pathophysiological mechanism
causing her symptoms?
A. Decreased cardiac output from reduced stroke volume
B. Impaired diastolic relaxation leading to elevated filling pressures
C. Mitral valve regurgitation from annular dilation
D. Pulmonary hypertension from left-sided pressure elevation
Correct Answer: B
Rationale: Concentric LV hypertrophy from chronic hypertension causes impaired
diastolic relaxation (diastolic dysfunction). Despite preserved ejection fraction, the
stiff ventricle cannot fill adequately, leading to elevated filling pressures, which
causes dyspnea and fatigue. While stroke volume may be affected, the primary
mechanism is diastolic dysfunction.
4. A 28-year-old African American female with a history of chronic anemia since
childhood presents with acute chest pain, fever, and dyspnea. Her hemoglobin is
,7.2 g/dL, and peripheral blood smear shows sickle-shaped erythrocytes. Which
of the following is the most likely trigger for her acute crisis?
A. Folic acid deficiency
B. Dehydration or infection
C. Iron supplementation
D. Vitamin B12 deficiency
Correct Answer: B
Rationale: Sickle cell disease crisis is often precipitated by conditions that increase
oxygen demand or cause dehydration, including infection, fever, and volume
depletion. These conditions promote hemoglobin S polymerization and
subsequent sickling. Folic acid deficiency can worsen anemia but is not the
primary trigger for acute crisis.
5. A 62-year-old male with a 40-pack-year smoking history presents with
hemoptysis, weight loss, and fatigue. Chest CT reveals a mass in the right upper
lobe with mediastinal lymphadenopathy. Laboratory studies show serum
sodium of 120 mEq/L and elevated antidiuretic hormone levels. What is the
most likely mechanism of his hyponatremia?
A. Adrenal insufficiency from metastatic disease
B. Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
C. Renal sodium wasting from chemotherapy
D. Excessive fluid intake from increased thirst
Correct Answer: B
Rationale: Small cell lung cancer can produce ectopic ADH, leading to SIADH. This
results in water retention, dilutional hyponatremia, and concentrated urine
despite low serum osmolality. The finding of elevated ADH in the presence of low
sodium confirms this mechanism.
, 6. A 50-year-old female presents with complaints of fatigue, cold intolerance,
and weight gain of 15 pounds over 6 months. Physical examination reveals dry
skin, periorbital edema, and delayed deep tendon reflexes. Laboratory studies
show TSH of 25 mIU/L (normal 0.5-5.0) and free T4 of 0.4 ng/dL (normal 0.8-
2.0). What is the most likely underlying pathology?
A. Pituitary adenoma producing excess TSH
B. Autoimmune destruction of the thyroid gland
C. Hypothalamic dysfunction reducing TRH release
D. Iodine deficiency reducing thyroid hormone synthesis
Correct Answer: B
Rationale: Primary hypothyroidism with elevated TSH and low free T4 typically
results from autoimmune destruction of the thyroid gland (Hashimoto's
thyroiditis). The TSH is appropriately elevated in response to low T4 levels, ruling
out pituitary or hypothalamic causes.
7. A 38-year-old male presents with palpitations, heat intolerance, and a 20-
pound weight loss over 3 months. Physical examination reveals exophthalmos,
thyroid bruit, and fine tremors. Laboratory studies show TSH <0.01 mIU/L and
free T4 of 3.8 ng/dL. Which of the following is the most likely diagnosis?
A. Graves' disease
B. Toxic multinodular goiter
C. Subacute thyroiditis
D. Pituitary adenoma
Correct Answer: A
Rationale: Graves' disease is the most common cause of hyperthyroidism and
presents with the classic triad of hyperthyroidism, ophthalmopathy, and thyroid
bruit from increased vascularity. The suppressed TSH with elevated free T4
confirms primary hyperthyroidism.
