NURS 611 Exam 4 V2 | NURS 611
Advanced Pathophysiology | Maryville
University of St. Louis | 2026 Q&A with
Rationale (Maryville NURS611 Exam 4
2026)
1. A patient with Chronic Kidney Disease (CKD) presents with a low hemoglobin level. What is
the primary cause of anemia in this patient population?
A. Inadequate intake of dietary iron
B. Chronic blood loss during hemodialysis
C. Deficiency in erythropoietin production
D. Shortened lifespan of red blood cells due to uremia
Correct Answer: C
Rationale: In CKD, the kidneys lose their ability to produce sufficient erythropoietin, which
is the hormone responsible for stimulating red blood cell production in the bone marrow.
While uremia and blood loss can contribute, the primary pathophysiology is hormonal
deficiency. This typically results in a normocytic, normochromic anemia that requires
synthetic erythropoietin replacement therapy.
2. Which electrolyte abnormality is most commonly associated with the Syndrome of
Inappropriate Antidiuretic Hormone (SIADH)?
A. Hyperkalemia
,B. Hypercalcemia
C. Hyponatremia
D. Hypomagnesemia
Correct Answer: C
Rationale: SIADH results in excessive water reabsorption by the kidneys regardless of
serum osmolality. This excess water expands the extracellular fluid volume and leads to
dilutional hyponatremia. The condition is characterized by high urine osmolality and low
serum osmolality, often requiring fluid restriction for management.
3. A patient with Diabetes Insipidus (DI) is likely to exhibit which of the following clinical
manifestations?
A. Concentrated urine and fluid overload
B. Low serum osmolality and weight gain
C. High serum sodium and polyuria
D. Peripheral edema and hypertension
Correct Answer: C
Rationale: Diabetes Insipidus is caused by a deficiency of or resistance to ADH, leading to
an inability to concentrate urine. This results in the excretion of large volumes of dilute
urine (polyuria) and extreme thirst (polydipsia). Consequently, the loss of free water leads
to hemoconcentration and hypernatremia, reflecting high serum osmolality.
, 4. What is the primary pathophysiology behind Type 2 Diabetes Mellitus?
A. Autoimmune destruction of pancreatic beta cells
B. Infection leading to pancreatic necrosis
C. Absolute insulin deficiency
D. Insulin resistance and relative insulin deficiency
Correct Answer: D
Rationale: Type 2 Diabetes Mellitus is characterized by peripheral insulin resistance
where tissues do not respond effectively to insulin. Over time, the pancreatic beta cells
become exhausted and cannot produce enough insulin to overcome this resistance, leading
to hyperglycemia. Unlike Type 1, it is generally associated with metabolic syndrome and
obesity rather than autoimmune destruction.
5. Which physical finding is a hallmark of Cushing Syndrome?
A. Bronze-colored skin pigmentation
B. Central obesity and a ‘buffalo hump’
C. Exophthalmos and tremors
D. Extreme weight loss and hypotension
Correct Answer: B
Rationale: Cushing Syndrome results from chronic exposure to excessive levels of cortisol.
This leads to characteristic fat redistribution, resulting in trunkal obesity, moon face, and a
Advanced Pathophysiology | Maryville
University of St. Louis | 2026 Q&A with
Rationale (Maryville NURS611 Exam 4
2026)
1. A patient with Chronic Kidney Disease (CKD) presents with a low hemoglobin level. What is
the primary cause of anemia in this patient population?
A. Inadequate intake of dietary iron
B. Chronic blood loss during hemodialysis
C. Deficiency in erythropoietin production
D. Shortened lifespan of red blood cells due to uremia
Correct Answer: C
Rationale: In CKD, the kidneys lose their ability to produce sufficient erythropoietin, which
is the hormone responsible for stimulating red blood cell production in the bone marrow.
While uremia and blood loss can contribute, the primary pathophysiology is hormonal
deficiency. This typically results in a normocytic, normochromic anemia that requires
synthetic erythropoietin replacement therapy.
2. Which electrolyte abnormality is most commonly associated with the Syndrome of
Inappropriate Antidiuretic Hormone (SIADH)?
A. Hyperkalemia
,B. Hypercalcemia
C. Hyponatremia
D. Hypomagnesemia
Correct Answer: C
Rationale: SIADH results in excessive water reabsorption by the kidneys regardless of
serum osmolality. This excess water expands the extracellular fluid volume and leads to
dilutional hyponatremia. The condition is characterized by high urine osmolality and low
serum osmolality, often requiring fluid restriction for management.
3. A patient with Diabetes Insipidus (DI) is likely to exhibit which of the following clinical
manifestations?
A. Concentrated urine and fluid overload
B. Low serum osmolality and weight gain
C. High serum sodium and polyuria
D. Peripheral edema and hypertension
Correct Answer: C
Rationale: Diabetes Insipidus is caused by a deficiency of or resistance to ADH, leading to
an inability to concentrate urine. This results in the excretion of large volumes of dilute
urine (polyuria) and extreme thirst (polydipsia). Consequently, the loss of free water leads
to hemoconcentration and hypernatremia, reflecting high serum osmolality.
, 4. What is the primary pathophysiology behind Type 2 Diabetes Mellitus?
A. Autoimmune destruction of pancreatic beta cells
B. Infection leading to pancreatic necrosis
C. Absolute insulin deficiency
D. Insulin resistance and relative insulin deficiency
Correct Answer: D
Rationale: Type 2 Diabetes Mellitus is characterized by peripheral insulin resistance
where tissues do not respond effectively to insulin. Over time, the pancreatic beta cells
become exhausted and cannot produce enough insulin to overcome this resistance, leading
to hyperglycemia. Unlike Type 1, it is generally associated with metabolic syndrome and
obesity rather than autoimmune destruction.
5. Which physical finding is a hallmark of Cushing Syndrome?
A. Bronze-colored skin pigmentation
B. Central obesity and a ‘buffalo hump’
C. Exophthalmos and tremors
D. Extreme weight loss and hypotension
Correct Answer: B
Rationale: Cushing Syndrome results from chronic exposure to excessive levels of cortisol.
This leads to characteristic fat redistribution, resulting in trunkal obesity, moon face, and a
