ADVANCED PATHOPHYSIOLOGY NURS
6501 EXAM 4 FINAL COMPREHENSIVE
QUESTIONS AND ANSWERS
1. A patient presents with exophthalmos, heat intolerance, and a low TSH level. Which
pathophysiological mechanism is most likely responsible?
A. Thyroid-stimulating immunoglobulins mimicking TSH
B. Pituitary adenoma secreting excessive ACTH
C. Autoimmune destruction of thyroid follicles
D. Iodine deficiency leading to goiter
Answer: A
Conceptual Explanation: Graves disease is caused by Type II hypersensitivity where
antibodies (TSI) stimulate the TSH receptor, leading to hyperthyroidism and exophthalmos.
2. In the development of Type 2 Diabetes Mellitus, what is the primary cause of insulin
resistance at the cellular level?
A. Absolute deficiency of insulin production
B. Defect in the glucagon-like peptide-1 (GLP-1) receptor
,C. Autoimmune destruction of Beta cells
D. Down-regulation of glucose transporters (GLUT4)
Answer: D
Conceptual Explanation: Insulin resistance involves suboptimal response of insulin-
sensitive tissues, often characterized by defects in post-receptor signaling and reduced
GLUT4 translocation.
3. Which electrolyte abnormality is most commonly associated with Syndrome of
Inappropriate Antidiuretic Hormone (SIADH)?
A. Hyperkalemia
B. Hyponatremia
C. Hypernatremia
D. Hypocalcemia
Answer: B
Conceptual Explanation: SIADH leads to excessive water reabsorption in the kidneys,
resulting in dilutional hyponatremia and highly concentrated urine.
4. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the initiating factor?
A. Hypophosphatemia
B. Vitamin D toxicity
, C. Excessive calcium intake
D. Hypocalcemia due to decreased Vitamin D activation
Answer: D
Conceptual Explanation: In CKD, the kidneys fail to activate Vitamin D and excrete
phosphate. Low serum calcium then triggers the parathyroid glands to release more PTH.
5. Which clinical finding is a hallmark of Nephrotic Syndrome rather than Nephritic
Syndrome?
A. Gross hematuria
B. Red blood cell casts in urine
C. Oliguria
D. Proteinuria greater than 3.5g/24 hours
Answer: D
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria,
hypoalbuminemia, and edema, whereas Nephritic syndrome is characterized by
inflammation and hematuria.
6. What is the primary cause of pre-renal Acute Kidney Injury (AKI)?
A. Obstruction of the ureters
B. Acute tubular necrosis (ATN)
C. Glomerulonephritis
6501 EXAM 4 FINAL COMPREHENSIVE
QUESTIONS AND ANSWERS
1. A patient presents with exophthalmos, heat intolerance, and a low TSH level. Which
pathophysiological mechanism is most likely responsible?
A. Thyroid-stimulating immunoglobulins mimicking TSH
B. Pituitary adenoma secreting excessive ACTH
C. Autoimmune destruction of thyroid follicles
D. Iodine deficiency leading to goiter
Answer: A
Conceptual Explanation: Graves disease is caused by Type II hypersensitivity where
antibodies (TSI) stimulate the TSH receptor, leading to hyperthyroidism and exophthalmos.
2. In the development of Type 2 Diabetes Mellitus, what is the primary cause of insulin
resistance at the cellular level?
A. Absolute deficiency of insulin production
B. Defect in the glucagon-like peptide-1 (GLP-1) receptor
,C. Autoimmune destruction of Beta cells
D. Down-regulation of glucose transporters (GLUT4)
Answer: D
Conceptual Explanation: Insulin resistance involves suboptimal response of insulin-
sensitive tissues, often characterized by defects in post-receptor signaling and reduced
GLUT4 translocation.
3. Which electrolyte abnormality is most commonly associated with Syndrome of
Inappropriate Antidiuretic Hormone (SIADH)?
A. Hyperkalemia
B. Hyponatremia
C. Hypernatremia
D. Hypocalcemia
Answer: B
Conceptual Explanation: SIADH leads to excessive water reabsorption in the kidneys,
resulting in dilutional hyponatremia and highly concentrated urine.
4. A patient with chronic kidney disease (CKD) develops secondary hyperparathyroidism.
What is the initiating factor?
A. Hypophosphatemia
B. Vitamin D toxicity
, C. Excessive calcium intake
D. Hypocalcemia due to decreased Vitamin D activation
Answer: D
Conceptual Explanation: In CKD, the kidneys fail to activate Vitamin D and excrete
phosphate. Low serum calcium then triggers the parathyroid glands to release more PTH.
5. Which clinical finding is a hallmark of Nephrotic Syndrome rather than Nephritic
Syndrome?
A. Gross hematuria
B. Red blood cell casts in urine
C. Oliguria
D. Proteinuria greater than 3.5g/24 hours
Answer: D
Conceptual Explanation: Nephrotic syndrome is characterized by massive proteinuria,
hypoalbuminemia, and edema, whereas Nephritic syndrome is characterized by
inflammation and hematuria.
6. What is the primary cause of pre-renal Acute Kidney Injury (AKI)?
A. Obstruction of the ureters
B. Acute tubular necrosis (ATN)
C. Glomerulonephritis
