NUR 641EA Exam 4 V1 | NUR 641EA
Advanced Pathophysiology and
Pharmacology for Nurse Educators |
Actual Q&A with Rationale (NUR641EA
Exam 4) | Grand Canyon University
1. A 65-year-old patient presents with acute kidney injury (AKI). The nurse educator explains
that prerenal causes are primarily related to decreased perfusion. Which of the following
conditions are considered prerenal causes? (Select All That Apply)
A. Hypovolemia
B. Cardiogenic shock
C. Acute tubular necrosis
D. Renal artery stenosis
E. Benign prostatic hyperplasia
F. Severe dehydration
Correct Answer: A, B, D, F
Rationale: Prerenal AKI is caused by factors that reduce systemic circulation, causing a
decrease in renal blood flow. Hypovolemia, cardiogenic shock, and severe dehydration all
lead to reduced cardiac output and subsequent renal hypoperfusion. Renal artery stenosis
directly limits the flow of blood entering the kidney, making it a classic prerenal etiology.
,2. When examining the pathophysiology of Chronic Kidney Disease (CKD), which factor is the
primary driver of secondary hyperparathyroidism?
A. Hypercalcemia
B. Hyperphosphatemia
C. Hypophosphatemia
D. Increased Vitamin D activation
Correct Answer: B
Rationale: In CKD, the kidneys fail to excrete phosphate, leading to hyperphosphatemia
which conversely binds to ionized calcium. This resulting hypocalcemia and the elevated
phosphate levels stimulate the parathyroid glands to release PTH. Over time, this constant
stimulation leads to secondary hyperparathyroidism and renal osteodystrophy.
3. A patient is prescribed Furosemide (Lasix) for fluid volume overload. The nurse educator
knows this medication acts on which specific part of the nephron?
A. Proximal convoluted tubule
B. Descending limb of the loop of Henle
C. Distal convoluted tubule
D. Thick ascending limb of the loop of Henle
Correct Answer: D
, Rationale: Furosemide is a loop diuretic that inhibits the Na-K-2Cl symporter in the thick
ascending limb of the loop of Henle. By blocking this transporter, the reabsorption of
sodium and chloride is significantly reduced. This action creates a high osmotic pressure in
the tubule lumen, preventing water reabsorption and promoting diuresis.
4. Polycystic Ovary Syndrome (PCOS) is characterized by which of the following underlying
pathophysiological mechanisms?
A. Excessive estrogen production only
B. Decreased Luteinizing Hormone (LH) levels
C. Insulin resistance and hyperandrogenism
D. Primary adrenal insufficiency
Correct Answer: C
Rationale: PCOS involves a complex interaction of insulin resistance and elevated
androgen levels. Hyperinsulinemia stimulates the ovaries to produce excess testosterone
and inhibits the production of sex hormone-binding globulin. This hormonal environment
disrupts the normal follicular development, leading to the classic polycystic appearance
and anovulation.
5. Which type of skin cancer is most closely associated with chronic sun exposure and has the
highest potential for metastasis if not treated early?
A. Basal Cell Carcinoma
B. Malignant Melanoma
Advanced Pathophysiology and
Pharmacology for Nurse Educators |
Actual Q&A with Rationale (NUR641EA
Exam 4) | Grand Canyon University
1. A 65-year-old patient presents with acute kidney injury (AKI). The nurse educator explains
that prerenal causes are primarily related to decreased perfusion. Which of the following
conditions are considered prerenal causes? (Select All That Apply)
A. Hypovolemia
B. Cardiogenic shock
C. Acute tubular necrosis
D. Renal artery stenosis
E. Benign prostatic hyperplasia
F. Severe dehydration
Correct Answer: A, B, D, F
Rationale: Prerenal AKI is caused by factors that reduce systemic circulation, causing a
decrease in renal blood flow. Hypovolemia, cardiogenic shock, and severe dehydration all
lead to reduced cardiac output and subsequent renal hypoperfusion. Renal artery stenosis
directly limits the flow of blood entering the kidney, making it a classic prerenal etiology.
,2. When examining the pathophysiology of Chronic Kidney Disease (CKD), which factor is the
primary driver of secondary hyperparathyroidism?
A. Hypercalcemia
B. Hyperphosphatemia
C. Hypophosphatemia
D. Increased Vitamin D activation
Correct Answer: B
Rationale: In CKD, the kidneys fail to excrete phosphate, leading to hyperphosphatemia
which conversely binds to ionized calcium. This resulting hypocalcemia and the elevated
phosphate levels stimulate the parathyroid glands to release PTH. Over time, this constant
stimulation leads to secondary hyperparathyroidism and renal osteodystrophy.
3. A patient is prescribed Furosemide (Lasix) for fluid volume overload. The nurse educator
knows this medication acts on which specific part of the nephron?
A. Proximal convoluted tubule
B. Descending limb of the loop of Henle
C. Distal convoluted tubule
D. Thick ascending limb of the loop of Henle
Correct Answer: D
, Rationale: Furosemide is a loop diuretic that inhibits the Na-K-2Cl symporter in the thick
ascending limb of the loop of Henle. By blocking this transporter, the reabsorption of
sodium and chloride is significantly reduced. This action creates a high osmotic pressure in
the tubule lumen, preventing water reabsorption and promoting diuresis.
4. Polycystic Ovary Syndrome (PCOS) is characterized by which of the following underlying
pathophysiological mechanisms?
A. Excessive estrogen production only
B. Decreased Luteinizing Hormone (LH) levels
C. Insulin resistance and hyperandrogenism
D. Primary adrenal insufficiency
Correct Answer: C
Rationale: PCOS involves a complex interaction of insulin resistance and elevated
androgen levels. Hyperinsulinemia stimulates the ovaries to produce excess testosterone
and inhibits the production of sex hormone-binding globulin. This hormonal environment
disrupts the normal follicular development, leading to the classic polycystic appearance
and anovulation.
5. Which type of skin cancer is most closely associated with chronic sun exposure and has the
highest potential for metastasis if not treated early?
A. Basal Cell Carcinoma
B. Malignant Melanoma
