NR 507 Exam 2: Advanced Pathophysiology V3 -
Chamberlain University Updated and Latest Questions and
Correct Answers with Rationale
1. Which of the following is the primary mechanism of anemia in patients with chronic kidney disease
(CKD)?
A. Vitamin B12 deficiency
B. Reduced production of erythropoietin
C. Excessive iron loss through the kidneys
D. Direct destruction of RBCs by urea
Ans: B
Explanation: Chronic kidney disease leads to a significant decrease in the production of erythropoietin
by the peritubular cells of the kidney. This hormone is essential for stimulating red blood cell production
within the bone marrow. Without adequate erythropoietin, the rate of erythropoiesis declines despite
normal iron levels. This results in a normocytic, normochromic anemia that progresses as renal function
worsens. Clinically, exogenous erythropoietin-stimulating agents are often required to manage this
condition.
2. In the pathophysiology of Type 2 Diabetes Mellitus, what is the ‘incretin effect’ referring to?
A. Excessive secretion of glucagon from alpha cells
B. Increased hepatic glucose production during fasting
C. Decreased insulin secretion after an oral glucose load
D. Resistance of peripheral tissues to insulin
Ans: C
,Explanation: The incretin effect describes the phenomenon where oral glucose triggers a larger insulin
response than intravenous glucose. This occurs due to the release of gut hormones like GLP-1 and GIP
that enhance insulin secretion. In patients with Type 2 Diabetes, this incretin response is significantly
blunted or diminished. This deficit contributes to postprandial hyperglycemia and impaired glucose
homeostasis. Pharmaceutical interventions now target these pathways to restore insulinotropic activity.
3. Which electrolyte imbalance is most commonly associated with Syndrome of Inappropriate Antidiuretic
Hormone (SIADH)?
A. Hypernatremia
B. Hyponatremia
C. Hypokalemia
D. Hypercalcemia
Ans: B
Explanation: SIADH involves the excessive release of antidiuretic hormone, which causes the kidneys to
retain too much water. This leads to a dilutional hyponatremia as the extracellular fluid volume expands.
The excess water retention suppresses the renin-angiotensin-aldosterone system, further preventing
sodium reabsorption. Consequently, the plasma sodium concentration drops despite the total body
sodium being relatively normal. Patients must be monitored closely for neurological changes due to
cerebral edema.
4. What is the primary cause of pulmonary edema in patients suffering from left-sided heart failure?
A. Increased pulmonary capillary hydrostatic pressure
B. Decreased oncotic pressure in the capillaries
C. Increased permeability of the alveolar-capillary membrane
, D. Obstruction of the lymphatic drainage system
Ans: A
Explanation: Left-sided heart failure results in the inability of the left ventricle to pump blood efficiently
into the systemic circulation. This leads to a backup of blood into the left atrium and pulmonary veins.
The resulting increase in pulmonary venous pressure raises the hydrostatic pressure within the
pulmonary capillaries. When hydrostatic pressure exceeds the plasma oncotic pressure, fluid is pushed
into the interstitial and alveolar spaces. This accumulation of fluid impairs gas exchange and causes
severe dyspnea.
5. Which condition is characterized by the presence of ‘Bence-Jones proteins’ in the urine?
A. Nephrotic Syndrome
B. Multiple Myeloma
C. Acute Tubular Necrosis
D. Systemic Lupus Erythematosus
Ans: B
Explanation: Multiple myeloma is a malignancy of plasma cells that produce excessive amounts of
monoclonal immunoglobulins. Bence-Jones proteins are free light chains of these immunoglobulins that
are small enough to pass through the glomerulus. Their presence in the urine is a hallmark diagnostic
feature of this hematological cancer. These proteins can be toxic to the renal tubular epithelial cells,
leading to kidney damage. Screening for these proteins often involves a 24-hour urine collection for
electrophoresis.
6. Which pathophysiology characterizes Graves’ disease?
A. Autoimmune destruction of the thyroid gland
Chamberlain University Updated and Latest Questions and
Correct Answers with Rationale
1. Which of the following is the primary mechanism of anemia in patients with chronic kidney disease
(CKD)?
A. Vitamin B12 deficiency
B. Reduced production of erythropoietin
C. Excessive iron loss through the kidneys
D. Direct destruction of RBCs by urea
Ans: B
Explanation: Chronic kidney disease leads to a significant decrease in the production of erythropoietin
by the peritubular cells of the kidney. This hormone is essential for stimulating red blood cell production
within the bone marrow. Without adequate erythropoietin, the rate of erythropoiesis declines despite
normal iron levels. This results in a normocytic, normochromic anemia that progresses as renal function
worsens. Clinically, exogenous erythropoietin-stimulating agents are often required to manage this
condition.
2. In the pathophysiology of Type 2 Diabetes Mellitus, what is the ‘incretin effect’ referring to?
A. Excessive secretion of glucagon from alpha cells
B. Increased hepatic glucose production during fasting
C. Decreased insulin secretion after an oral glucose load
D. Resistance of peripheral tissues to insulin
Ans: C
,Explanation: The incretin effect describes the phenomenon where oral glucose triggers a larger insulin
response than intravenous glucose. This occurs due to the release of gut hormones like GLP-1 and GIP
that enhance insulin secretion. In patients with Type 2 Diabetes, this incretin response is significantly
blunted or diminished. This deficit contributes to postprandial hyperglycemia and impaired glucose
homeostasis. Pharmaceutical interventions now target these pathways to restore insulinotropic activity.
3. Which electrolyte imbalance is most commonly associated with Syndrome of Inappropriate Antidiuretic
Hormone (SIADH)?
A. Hypernatremia
B. Hyponatremia
C. Hypokalemia
D. Hypercalcemia
Ans: B
Explanation: SIADH involves the excessive release of antidiuretic hormone, which causes the kidneys to
retain too much water. This leads to a dilutional hyponatremia as the extracellular fluid volume expands.
The excess water retention suppresses the renin-angiotensin-aldosterone system, further preventing
sodium reabsorption. Consequently, the plasma sodium concentration drops despite the total body
sodium being relatively normal. Patients must be monitored closely for neurological changes due to
cerebral edema.
4. What is the primary cause of pulmonary edema in patients suffering from left-sided heart failure?
A. Increased pulmonary capillary hydrostatic pressure
B. Decreased oncotic pressure in the capillaries
C. Increased permeability of the alveolar-capillary membrane
, D. Obstruction of the lymphatic drainage system
Ans: A
Explanation: Left-sided heart failure results in the inability of the left ventricle to pump blood efficiently
into the systemic circulation. This leads to a backup of blood into the left atrium and pulmonary veins.
The resulting increase in pulmonary venous pressure raises the hydrostatic pressure within the
pulmonary capillaries. When hydrostatic pressure exceeds the plasma oncotic pressure, fluid is pushed
into the interstitial and alveolar spaces. This accumulation of fluid impairs gas exchange and causes
severe dyspnea.
5. Which condition is characterized by the presence of ‘Bence-Jones proteins’ in the urine?
A. Nephrotic Syndrome
B. Multiple Myeloma
C. Acute Tubular Necrosis
D. Systemic Lupus Erythematosus
Ans: B
Explanation: Multiple myeloma is a malignancy of plasma cells that produce excessive amounts of
monoclonal immunoglobulins. Bence-Jones proteins are free light chains of these immunoglobulins that
are small enough to pass through the glomerulus. Their presence in the urine is a hallmark diagnostic
feature of this hematological cancer. These proteins can be toxic to the renal tubular epithelial cells,
leading to kidney damage. Screening for these proteins often involves a 24-hour urine collection for
electrophoresis.
6. Which pathophysiology characterizes Graves’ disease?
A. Autoimmune destruction of the thyroid gland
