NSG 5003 EXAM 4 - ADVANCED
PATHOPHYSIOLOGY QUESTIONS
WITH COMPLETE SOLUTION
GUARANTEED SUCCESS.
1. Which of the following describes the primary pathophysiology of Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Decreased glucose uptake by the GLUT-4 transporters
C. Hypersecretion of glucagon from alpha cells
D. Autoimmune-mediated destruction of pancreatic beta cells
Answer: D
Conceptual Explanation: Type 1 Diabetes Mellitus is characterized by an autoimmune
destruction of insulin-producing beta cells in the islets of Langerhans, leading to absolute
insulin deficiency.
2. In Cushing’s Disease, the hypercortisolism is specifically caused by:
A. An ACTH-secreting pituitary adenoma
B. Exogenous administration of glucocorticoids
C. An adrenal cortex tumor
D. Ectopic production of ACTH by a lung tumor
,Answer: A
Conceptual Explanation: Cushing’s Disease specifically refers to hypercortisolism caused
by a pituitary adenoma secreting excessive ACTH, as opposed to Cushing’s Syndrome which
is a broader term for hypercortisolism from any cause.
3. What is the underlying mechanism of Graves’ Disease?
A. Destruction of thyroid follicles by T-cells
B. Pituitary failure to produce TSH
C. Iodine deficiency leading to goiter
D. Thyroid-stimulating immunoglobulins (TSI) mimicking TSH
Answer: D
Conceptual Explanation: Graves’ Disease is an autoimmune disorder where antibodies
(TSI) bind to and activate the TSH receptor, causing excessive production of thyroid
hormones.
4. Which electrolyte imbalance is classically associated with Addison’s Disease?
A. Hypernatremia and hypokalemia
B. Hyponatremia and hyperkalemia
C. Hypercalcemia and hypophosphatemia
D. Hypocalcemia and hypermagnesemia
Answer: B
, Conceptual Explanation: Addison’s Disease involves the loss of aldosterone, which
normally retains sodium and excretes potassium; its absence leads to hyponatremia and
hyperkalemia.
5. The primary pathophysiological feature of SIADH (Syndrome of Inappropriate Antidiuretic
Hormone) is:
A. Excessive water excretion resulting in dehydration
B. Reduced renal sensitivity to ADH
C. Hypernatremia due to concentrated urine
D. Water retention leading to dilutional hyponatremia
Answer: D
Conceptual Explanation: SIADH involves the excessive release of ADH, causing the
kidneys to reabsorb too much water, which dilutes the serum sodium levels.
6. Which clinical manifestation is highly suggestive of Pheochromocytoma?
A. Persistent hypotension and bradycardia
B. Generalized edema and weight gain
C. Episodic hypertension, diaphoresis, and tachycardia
D. Moon face and buffalo hump
Answer: C
PATHOPHYSIOLOGY QUESTIONS
WITH COMPLETE SOLUTION
GUARANTEED SUCCESS.
1. Which of the following describes the primary pathophysiology of Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Decreased glucose uptake by the GLUT-4 transporters
C. Hypersecretion of glucagon from alpha cells
D. Autoimmune-mediated destruction of pancreatic beta cells
Answer: D
Conceptual Explanation: Type 1 Diabetes Mellitus is characterized by an autoimmune
destruction of insulin-producing beta cells in the islets of Langerhans, leading to absolute
insulin deficiency.
2. In Cushing’s Disease, the hypercortisolism is specifically caused by:
A. An ACTH-secreting pituitary adenoma
B. Exogenous administration of glucocorticoids
C. An adrenal cortex tumor
D. Ectopic production of ACTH by a lung tumor
,Answer: A
Conceptual Explanation: Cushing’s Disease specifically refers to hypercortisolism caused
by a pituitary adenoma secreting excessive ACTH, as opposed to Cushing’s Syndrome which
is a broader term for hypercortisolism from any cause.
3. What is the underlying mechanism of Graves’ Disease?
A. Destruction of thyroid follicles by T-cells
B. Pituitary failure to produce TSH
C. Iodine deficiency leading to goiter
D. Thyroid-stimulating immunoglobulins (TSI) mimicking TSH
Answer: D
Conceptual Explanation: Graves’ Disease is an autoimmune disorder where antibodies
(TSI) bind to and activate the TSH receptor, causing excessive production of thyroid
hormones.
4. Which electrolyte imbalance is classically associated with Addison’s Disease?
A. Hypernatremia and hypokalemia
B. Hyponatremia and hyperkalemia
C. Hypercalcemia and hypophosphatemia
D. Hypocalcemia and hypermagnesemia
Answer: B
, Conceptual Explanation: Addison’s Disease involves the loss of aldosterone, which
normally retains sodium and excretes potassium; its absence leads to hyponatremia and
hyperkalemia.
5. The primary pathophysiological feature of SIADH (Syndrome of Inappropriate Antidiuretic
Hormone) is:
A. Excessive water excretion resulting in dehydration
B. Reduced renal sensitivity to ADH
C. Hypernatremia due to concentrated urine
D. Water retention leading to dilutional hyponatremia
Answer: D
Conceptual Explanation: SIADH involves the excessive release of ADH, causing the
kidneys to reabsorb too much water, which dilutes the serum sodium levels.
6. Which clinical manifestation is highly suggestive of Pheochromocytoma?
A. Persistent hypotension and bradycardia
B. Generalized edema and weight gain
C. Episodic hypertension, diaphoresis, and tachycardia
D. Moon face and buffalo hump
Answer: C
