NR507 ADVANCED
PATHOPHYSIOLOGY EXAM REVIEW
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which mechanism best describes the primary defect in Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Excessive glucagon secretion from alpha cells
C. Autoimmune destruction of pancreatic beta cells
D. Impaired glucose uptake by the liver
Answer: C
Conceptual Explanation: Type 1 Diabetes is characterized by an autoimmune-mediated
destruction of the insulin-producing beta cells in the islets of Langerhans, leading to
absolute insulin deficiency.
2. What is the primary physiological trigger for the release of Renin from the juxtaglomerular
apparatus?
A. Increased blood pressure in the afferent arteriole
B. High serum potassium levels
C. Activation of the parasympathetic nervous system
,D. Decreased renal perfusion and low sodium delivery to the macula densa
Answer: D
Conceptual Explanation: Renin is released in response to decreased renal blood flow,
decreased blood pressure, or decreased sodium chloride delivery to the macula densa cells.
3. A patient with chronic hypertension develops left ventricular hypertrophy. Which cellular
adaptation is occurring?
A. Hyperplasia
B. Metaplasia
C. Hypertrophy
D. Dysplasia
Answer: C
Conceptual Explanation: Hypertrophy is an increase in the size of cells in response to
mechanical load or stress, common in cardiac muscle cells which cannot divide.
4. In the context of the oxyhemoglobin dissociation curve, which factor causes a ‘shift to the
right’?
A. Decreased temperature
B. Increased PCO2 (Hypercapnia)
C. Decreased 2,3-DPG
D. Increased pH (Alkalosis)
, Answer: B
Conceptual Explanation: A shift to the right, which decreases hemoglobin’s affinity for
oxygen, is caused by increased PCO2, increased temperature, increased 2,3-DPG, and
decreased pH.
5. Which type of hypersensitivity reaction is mediated by IgE and results in mast cell
degranulation?
A. Type IV (Delayed)
B. Type II (Cytotoxic)
C. Type III (Immune complex)
D. Type I (Immediate)
Answer: D
Conceptual Explanation: Type I hypersensitivity involves allergen binding to IgE on mast
cells, triggering the release of histamine and other inflammatory mediators.
6. What is the hallmark finding in Nephrotic Syndrome that distinguishes it from Nephritic
Syndrome?
A. Gross hematuria
B. Proteinuria greater than 3.5 g/day
C. Elevated blood pressure
D. RBC casts in urine
PATHOPHYSIOLOGY EXAM REVIEW
QUESTIONS AND VERIFIED ANSWERS |
100% CORRECT | GRADE A+
1. Which mechanism best describes the primary defect in Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Excessive glucagon secretion from alpha cells
C. Autoimmune destruction of pancreatic beta cells
D. Impaired glucose uptake by the liver
Answer: C
Conceptual Explanation: Type 1 Diabetes is characterized by an autoimmune-mediated
destruction of the insulin-producing beta cells in the islets of Langerhans, leading to
absolute insulin deficiency.
2. What is the primary physiological trigger for the release of Renin from the juxtaglomerular
apparatus?
A. Increased blood pressure in the afferent arteriole
B. High serum potassium levels
C. Activation of the parasympathetic nervous system
,D. Decreased renal perfusion and low sodium delivery to the macula densa
Answer: D
Conceptual Explanation: Renin is released in response to decreased renal blood flow,
decreased blood pressure, or decreased sodium chloride delivery to the macula densa cells.
3. A patient with chronic hypertension develops left ventricular hypertrophy. Which cellular
adaptation is occurring?
A. Hyperplasia
B. Metaplasia
C. Hypertrophy
D. Dysplasia
Answer: C
Conceptual Explanation: Hypertrophy is an increase in the size of cells in response to
mechanical load or stress, common in cardiac muscle cells which cannot divide.
4. In the context of the oxyhemoglobin dissociation curve, which factor causes a ‘shift to the
right’?
A. Decreased temperature
B. Increased PCO2 (Hypercapnia)
C. Decreased 2,3-DPG
D. Increased pH (Alkalosis)
, Answer: B
Conceptual Explanation: A shift to the right, which decreases hemoglobin’s affinity for
oxygen, is caused by increased PCO2, increased temperature, increased 2,3-DPG, and
decreased pH.
5. Which type of hypersensitivity reaction is mediated by IgE and results in mast cell
degranulation?
A. Type IV (Delayed)
B. Type II (Cytotoxic)
C. Type III (Immune complex)
D. Type I (Immediate)
Answer: D
Conceptual Explanation: Type I hypersensitivity involves allergen binding to IgE on mast
cells, triggering the release of histamine and other inflammatory mediators.
6. What is the hallmark finding in Nephrotic Syndrome that distinguishes it from Nephritic
Syndrome?
A. Gross hematuria
B. Proteinuria greater than 3.5 g/day
C. Elevated blood pressure
D. RBC casts in urine
