NURS6501 ADVANCED
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM PREP
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. A patient is diagnosed with metaplasia. Which statement best describes this cellular
adaptation?
A. The reversible replacement of one mature cell type by another mature cell type.
B. An increase in cell size resulting in an increase in organ size.
C. The replacement of one mature cell type by another less mature cell type.
D. Deranged cellular growth that results in variations of size and shape.
Answer: A
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
(e.g., ciliated columnar epithelium) by another mature cell type (e.g., stratified squamous
epithelium) usually due to chronic irritation.
2. In the context of the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary
trigger for the release of Renin by the juxtaglomerular cells?
A. Elevated serum potassium levels.
,B. Decreased blood pressure or decreased sodium delivery to the macula densa.
C. Increased perfusion pressure in the afferent arteriole.
D. Hypervolemia and increased stretch of the atria.
Answer: B
Conceptual Explanation: Renin is released in response to decreased renal perfusion,
sympathetic nervous system stimulation, or decreased sodium delivery to the distal
convoluted tubule.
3. Which electrolyte imbalance is most likely to cause a widened QRS complex and peaked T
waves on an EKG?
A. Hypokalemia
B. Hypermagnesemia
C. Hypocalcemia
D. Hyperkalemia
Answer: D
Conceptual Explanation: Hyperkalemia decreases the resting membrane potential,
leading to peaked T waves, prolonged PR interval, and eventually a widened QRS complex.
4. A 45-year-old male has a tumor that is secreting excessive Antidiuretic Hormone (SIADH).
What is the expected laboratory finding?
A. Decreased urine specific gravity.
, B. Serum sodium 150 mEq/L and high serum osmolality.
C. Serum potassium 5.5 mEq/L and metabolic acidosis.
D. Serum sodium 125 mEq/L and low serum osmolality.
Answer: D
Conceptual Explanation: SIADH causes excessive water retention, leading to dilutional
hyponatremia and low serum osmolality.
5. Which type of hypersensitivity reaction is mediated by IgE and involves the release of
histamine from mast cells?
A. Type III Hypersensitivity
B. Type II Hypersensitivity
C. Type I Hypersensitivity
D. Type IV Hypersensitivity
Answer: C
Conceptual Explanation: Type I hypersensitivity is an immediate allergic reaction
mediated by IgE antibodies binding to mast cells, triggering degranulation.
6. What is the primary pathophysiology behind Type 1 Diabetes Mellitus?
A. Beta-cell destruction leading to absolute insulin deficiency.
B. Insulin resistance in peripheral tissues.
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM PREP
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. A patient is diagnosed with metaplasia. Which statement best describes this cellular
adaptation?
A. The reversible replacement of one mature cell type by another mature cell type.
B. An increase in cell size resulting in an increase in organ size.
C. The replacement of one mature cell type by another less mature cell type.
D. Deranged cellular growth that results in variations of size and shape.
Answer: A
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
(e.g., ciliated columnar epithelium) by another mature cell type (e.g., stratified squamous
epithelium) usually due to chronic irritation.
2. In the context of the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary
trigger for the release of Renin by the juxtaglomerular cells?
A. Elevated serum potassium levels.
,B. Decreased blood pressure or decreased sodium delivery to the macula densa.
C. Increased perfusion pressure in the afferent arteriole.
D. Hypervolemia and increased stretch of the atria.
Answer: B
Conceptual Explanation: Renin is released in response to decreased renal perfusion,
sympathetic nervous system stimulation, or decreased sodium delivery to the distal
convoluted tubule.
3. Which electrolyte imbalance is most likely to cause a widened QRS complex and peaked T
waves on an EKG?
A. Hypokalemia
B. Hypermagnesemia
C. Hypocalcemia
D. Hyperkalemia
Answer: D
Conceptual Explanation: Hyperkalemia decreases the resting membrane potential,
leading to peaked T waves, prolonged PR interval, and eventually a widened QRS complex.
4. A 45-year-old male has a tumor that is secreting excessive Antidiuretic Hormone (SIADH).
What is the expected laboratory finding?
A. Decreased urine specific gravity.
, B. Serum sodium 150 mEq/L and high serum osmolality.
C. Serum potassium 5.5 mEq/L and metabolic acidosis.
D. Serum sodium 125 mEq/L and low serum osmolality.
Answer: D
Conceptual Explanation: SIADH causes excessive water retention, leading to dilutional
hyponatremia and low serum osmolality.
5. Which type of hypersensitivity reaction is mediated by IgE and involves the release of
histamine from mast cells?
A. Type III Hypersensitivity
B. Type II Hypersensitivity
C. Type I Hypersensitivity
D. Type IV Hypersensitivity
Answer: C
Conceptual Explanation: Type I hypersensitivity is an immediate allergic reaction
mediated by IgE antibodies binding to mast cells, triggering degranulation.
6. What is the primary pathophysiology behind Type 1 Diabetes Mellitus?
A. Beta-cell destruction leading to absolute insulin deficiency.
B. Insulin resistance in peripheral tissues.
