NURS 6501 Exam 2 V1 | NURS 6501 Advanced Pathophysiology |
Actual Q&A with Rationale (NURS 6501 Exam 2) | Walden
1. A 58-year-old male presents to the urgent care with a history of smoking 2 packs of
cigarettes per day for 40 years. He complains of a productive cough and worsening dyspnea.
Spirometry reveals a decreased FEV1/FVC ratio. Which pathophysiologic change is most
characteristic of his likely diagnosis of chronic bronchitis?
A. Permanent enlargement of gas-exchange airways with destruction of alveolar walls.
B. Acute reversible bronchospasm caused by type I hypersensitivity.
C. Hypertrophy of mucus-secreting glands in the bronchial wall.
D. Infiltration of the alveolar-capillary membrane by fibrotic tissue.
Answer: C
Rationale: Chronic bronchitis is defined by the hypersecretion of mucus and chronic
productive cough for at least 3 months of the year for at least 2 consecutive years. The
primary mechanism involves inspired irritants that cause airway inflammation and
bronchial edema, leading to the hypertrophy of goblet cells and mucus-secreting glands.
This results in the production of thick, tenacious mucus that cannot be cleared easily,
distinguishing it from emphysema which focuses more on alveolar destruction.
2. A 62-year-old female with a history of hypertension and atherosclerosis presents with
sudden-onset shortness of breath and orthopnea. Physical examination reveals bilateral
crackles in the lung bases and an S3 gallop. What is the primary hemodynamic alteration
responsible for her pulmonary edema?
A. Increased pulmonary capillary oncotic pressure.
B. Decreased pulmonary capillary hydrostatic pressure.
C. Increased left ventricular end-diastolic pressure.
D. Decreased systemic vascular resistance.
Answer: C
Rationale: This patient is presenting with acute left-sided heart failure. In left heart failure,
the left ventricle fails to pump efficiently, leading to an increase in left ventricular end-
diastolic volume and pressure. This pressure is transmitted backward to the left atrium and
into the pulmonary capillaries, increasing pulmonary capillary hydrostatic pressure and
forcing fluid into the interstitial and alveolar spaces.
,3. A 24-year-old male sustains a crush injury to his lower extremities. Following admission, his
urine output drops significantly, and his urine appears dark reddish-brown. Laboratory results
show elevated serum creatine kinase (CK) and myoglobinuria. Which mechanism explains his
acute kidney injury (AKI)?
A. Immunologic injury to the basement membrane.
B. Decreased renal perfusion due to neurogenic shock.
C. Compression of the ureters by external tissue edema.
D. Obstruction of the renal tubules by myoglobin casts.
Answer: D
Rationale: The patient is experiencing rhabdomyolysis resulting from a crush injury,
which releases massive amounts of myoglobin into the bloodstream. Myoglobin is filtered
by the glomerulus but is toxic to the renal tubular epithelium and can precipitate, forming
casts that obstruct the tubules. This leads to intrarenal acute kidney injury characterized by
dark urine and elevated muscle enzymes.
4. A 45-year-old female presents with tremors, heat intolerance, and a significant weight loss
despite an increased appetite. Lab work shows a suppressed Thyroid Stimulating Hormone
(TSH) level and elevated Free T4. Which underlying process is the most common cause of this
primary hyperthyroid state?
A. Pituitary adenoma secreting excess TSH.
B. Thyroid-stimulating immunoglobulins (TSI) mimicking TSH.
C. Ectopic production of thyroid hormone in the ovaries.
D. Destruction of the thyroid gland by T-lymphocytes.
Answer: B
Rationale: Graves’ disease is the most common cause of hyperthyroidism and is an
autoimmune disorder. It is characterized by the production of thyroid-stimulating
immunoglobulins (TSI), which are Type II hypersensitivity antibodies that bind to and
activate the TSH receptors on the thyroid gland. This results in the overproduction of
thyroid hormones and thyroid hyperplasia (goiter), independent of normal pituitary
feedback.
5. A 10-year-old child presents with sudden onset of polyuria, polydipsia, and weight loss.
Laboratory studies confirm hyperglycemia and fasting blood glucose of 240 mg/dL. Which
pathophysiologic event is the initial trigger for this condition?
A. Resistance of peripheral tissues to insulin action.
B. Hypersecretion of glucagon by alpha cells.
C. Autoimmune destruction of pancreatic beta cells.
, D. Exhaustion of beta cells due to high carbohydrate intake.
Answer: C
Rationale: Type 1 Diabetes Mellitus is typically an autoimmune disease where T-cell
mediated destruction of the insulin-producing beta cells in the pancreas occurs. This leads
to an absolute insulin deficiency, resulting in hyperglycemia and the clinical triad of
polyuria, polydipsia, and polyphagia. Unlike Type 2 DM, it is generally not related to insulin
resistance or lifestyle factors but involves a genetic predisposition triggered by
environmental factors.
6. A 70-year-old male is admitted with a suspected pulmonary embolism (PE). He recently
underwent hip replacement surgery and has been bedridden. Which specific factor from
Virchow’s triad most directly contributed to his risk for PE?
A. Venous stasis from immobility.
B. Inherited factor V Leiden mutation.
C. Endothelial injury from surgical trauma.
D. Platelet activation due to chronic inflammation.
Answer: A
Rationale: Virchow’s triad consists of venous stasis, hypercoagulability, and endothelial
injury. In this case, the patient’s immobility following surgery is the primary driver of
venous stasis, allowing for the accumulation of clotting factors and the formation of a deep
vein thrombosis (DVT). If the clot dislodges, it travels to the pulmonary vasculature,
resulting in a pulmonary embolism.
7. A 50-year-old patient with chronic kidney disease (CKD) presents with fatigue and
laboratory findings showing a hemoglobin of 8.2 g/dL. What is the most likely cause of this
patient’s anemia?
A. Increased destruction of red blood cells by the spleen.
B. Chronic blood loss through the gastrointestinal tract.
C. Inadequate production of erythropoietin.
D. Vitamin B12 deficiency due to dietary restrictions.
Answer: C
Rationale: The kidneys are the primary site for the production of erythropoietin, a
hormone that stimulates red blood cell production in the bone marrow. As renal function
declines in CKD, the peritubular cells in the kidney lose the ability to produce sufficient
erythropoietin, leading to normocytic normochromic anemia. This is a hallmark
hematologic complication of advancing renal failure.
Actual Q&A with Rationale (NURS 6501 Exam 2) | Walden
1. A 58-year-old male presents to the urgent care with a history of smoking 2 packs of
cigarettes per day for 40 years. He complains of a productive cough and worsening dyspnea.
Spirometry reveals a decreased FEV1/FVC ratio. Which pathophysiologic change is most
characteristic of his likely diagnosis of chronic bronchitis?
A. Permanent enlargement of gas-exchange airways with destruction of alveolar walls.
B. Acute reversible bronchospasm caused by type I hypersensitivity.
C. Hypertrophy of mucus-secreting glands in the bronchial wall.
D. Infiltration of the alveolar-capillary membrane by fibrotic tissue.
Answer: C
Rationale: Chronic bronchitis is defined by the hypersecretion of mucus and chronic
productive cough for at least 3 months of the year for at least 2 consecutive years. The
primary mechanism involves inspired irritants that cause airway inflammation and
bronchial edema, leading to the hypertrophy of goblet cells and mucus-secreting glands.
This results in the production of thick, tenacious mucus that cannot be cleared easily,
distinguishing it from emphysema which focuses more on alveolar destruction.
2. A 62-year-old female with a history of hypertension and atherosclerosis presents with
sudden-onset shortness of breath and orthopnea. Physical examination reveals bilateral
crackles in the lung bases and an S3 gallop. What is the primary hemodynamic alteration
responsible for her pulmonary edema?
A. Increased pulmonary capillary oncotic pressure.
B. Decreased pulmonary capillary hydrostatic pressure.
C. Increased left ventricular end-diastolic pressure.
D. Decreased systemic vascular resistance.
Answer: C
Rationale: This patient is presenting with acute left-sided heart failure. In left heart failure,
the left ventricle fails to pump efficiently, leading to an increase in left ventricular end-
diastolic volume and pressure. This pressure is transmitted backward to the left atrium and
into the pulmonary capillaries, increasing pulmonary capillary hydrostatic pressure and
forcing fluid into the interstitial and alveolar spaces.
,3. A 24-year-old male sustains a crush injury to his lower extremities. Following admission, his
urine output drops significantly, and his urine appears dark reddish-brown. Laboratory results
show elevated serum creatine kinase (CK) and myoglobinuria. Which mechanism explains his
acute kidney injury (AKI)?
A. Immunologic injury to the basement membrane.
B. Decreased renal perfusion due to neurogenic shock.
C. Compression of the ureters by external tissue edema.
D. Obstruction of the renal tubules by myoglobin casts.
Answer: D
Rationale: The patient is experiencing rhabdomyolysis resulting from a crush injury,
which releases massive amounts of myoglobin into the bloodstream. Myoglobin is filtered
by the glomerulus but is toxic to the renal tubular epithelium and can precipitate, forming
casts that obstruct the tubules. This leads to intrarenal acute kidney injury characterized by
dark urine and elevated muscle enzymes.
4. A 45-year-old female presents with tremors, heat intolerance, and a significant weight loss
despite an increased appetite. Lab work shows a suppressed Thyroid Stimulating Hormone
(TSH) level and elevated Free T4. Which underlying process is the most common cause of this
primary hyperthyroid state?
A. Pituitary adenoma secreting excess TSH.
B. Thyroid-stimulating immunoglobulins (TSI) mimicking TSH.
C. Ectopic production of thyroid hormone in the ovaries.
D. Destruction of the thyroid gland by T-lymphocytes.
Answer: B
Rationale: Graves’ disease is the most common cause of hyperthyroidism and is an
autoimmune disorder. It is characterized by the production of thyroid-stimulating
immunoglobulins (TSI), which are Type II hypersensitivity antibodies that bind to and
activate the TSH receptors on the thyroid gland. This results in the overproduction of
thyroid hormones and thyroid hyperplasia (goiter), independent of normal pituitary
feedback.
5. A 10-year-old child presents with sudden onset of polyuria, polydipsia, and weight loss.
Laboratory studies confirm hyperglycemia and fasting blood glucose of 240 mg/dL. Which
pathophysiologic event is the initial trigger for this condition?
A. Resistance of peripheral tissues to insulin action.
B. Hypersecretion of glucagon by alpha cells.
C. Autoimmune destruction of pancreatic beta cells.
, D. Exhaustion of beta cells due to high carbohydrate intake.
Answer: C
Rationale: Type 1 Diabetes Mellitus is typically an autoimmune disease where T-cell
mediated destruction of the insulin-producing beta cells in the pancreas occurs. This leads
to an absolute insulin deficiency, resulting in hyperglycemia and the clinical triad of
polyuria, polydipsia, and polyphagia. Unlike Type 2 DM, it is generally not related to insulin
resistance or lifestyle factors but involves a genetic predisposition triggered by
environmental factors.
6. A 70-year-old male is admitted with a suspected pulmonary embolism (PE). He recently
underwent hip replacement surgery and has been bedridden. Which specific factor from
Virchow’s triad most directly contributed to his risk for PE?
A. Venous stasis from immobility.
B. Inherited factor V Leiden mutation.
C. Endothelial injury from surgical trauma.
D. Platelet activation due to chronic inflammation.
Answer: A
Rationale: Virchow’s triad consists of venous stasis, hypercoagulability, and endothelial
injury. In this case, the patient’s immobility following surgery is the primary driver of
venous stasis, allowing for the accumulation of clotting factors and the formation of a deep
vein thrombosis (DVT). If the clot dislodges, it travels to the pulmonary vasculature,
resulting in a pulmonary embolism.
7. A 50-year-old patient with chronic kidney disease (CKD) presents with fatigue and
laboratory findings showing a hemoglobin of 8.2 g/dL. What is the most likely cause of this
patient’s anemia?
A. Increased destruction of red blood cells by the spleen.
B. Chronic blood loss through the gastrointestinal tract.
C. Inadequate production of erythropoietin.
D. Vitamin B12 deficiency due to dietary restrictions.
Answer: C
Rationale: The kidneys are the primary site for the production of erythropoietin, a
hormone that stimulates red blood cell production in the bone marrow. As renal function
declines in CKD, the peritubular cells in the kidney lose the ability to produce sufficient
erythropoietin, leading to normocytic normochromic anemia. This is a hallmark
hematologic complication of advancing renal failure.
