NR507 ADVANCED
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
AND VERIFIED ANSWERS| 100%
CORRECT |GRADE A – CHAMBERLAIN
1. Which of the following describes the mechanism of cellular injury caused by free radicals?
A. Activation of lysosomal enzymes
B. Oxidative stress causing membrane lipid peroxidation
C. Increased intracellular calcium levels
D. Decreased ATP production due to mitochondrial swelling
Answer: B
Conceptual Explanation: Free radicals cause cellular injury primarily through oxidative
stress, which leads to lipid peroxidation of membranes, protein alterations, and DNA
damage.
2. In Type II Hypersensitivity, what is the primary mechanism of tissue damage?
A. Immune complex deposition in vessel walls
B. IgE-mediated mast cell degranulation
C. Delayed-type hypersensitivity involving T-lymphocytes
,D. Antibodies reacting with antigens on specific cell surfaces
Answer: D
Conceptual Explanation: Type II hypersensitivity is tissue-specific; antibodies (IgG or
IgM) bind to antigens on the surface of specific cells or tissues, leading to destruction or
dysfunction.
3. A patient presents with a lack of intrinsic factor. Which type of anemia is most likely to
develop?
A. Iron deficiency anemia
B. Aplastic anemia
C. Hemolytic anemia
D. Pernicious anemia
Answer: D
Conceptual Explanation: Pernicious anemia is caused by a lack of intrinsic factor, which is
required for the absorption of vitamin B12 in the terminal ileum.
4. Which pathophysiological process occurs in the early stages of Diabetic Nephropathy?
A. Glomerular hypofiltration
B. Glomerular hyperfiltration and basement membrane thickening
C. Sudden decrease in serum creatinine
D. Destruction of the loop of Henle
, Answer: B
Conceptual Explanation: High blood glucose levels lead to glomerular hyperfiltration and
increased intraglomerular pressure, eventually causing basement membrane thickening
and microalbuminuria.
5. A patient with Grave’s disease will typically show which lab results?
A. High TSH and Low T4
B. Low TSH and High T4
C. Low TSH and Low T4
D. High TSH and High T4
Answer: B
Conceptual Explanation: In Grave’s disease (hyperthyroidism), thyroid-stimulating
immunoglobulins mimic TSH, causing excessive production of T4, which then provides
negative feedback to suppress pituitary TSH.
6. What is the hallmark physiological change in distributive shock, such as septic shock?
A. Decreased systemic vascular resistance due to vasodilation
B. Severe vasoconstriction
C. Increased systemic vascular resistance
D. High central venous pressure
Answer: A
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
AND VERIFIED ANSWERS| 100%
CORRECT |GRADE A – CHAMBERLAIN
1. Which of the following describes the mechanism of cellular injury caused by free radicals?
A. Activation of lysosomal enzymes
B. Oxidative stress causing membrane lipid peroxidation
C. Increased intracellular calcium levels
D. Decreased ATP production due to mitochondrial swelling
Answer: B
Conceptual Explanation: Free radicals cause cellular injury primarily through oxidative
stress, which leads to lipid peroxidation of membranes, protein alterations, and DNA
damage.
2. In Type II Hypersensitivity, what is the primary mechanism of tissue damage?
A. Immune complex deposition in vessel walls
B. IgE-mediated mast cell degranulation
C. Delayed-type hypersensitivity involving T-lymphocytes
,D. Antibodies reacting with antigens on specific cell surfaces
Answer: D
Conceptual Explanation: Type II hypersensitivity is tissue-specific; antibodies (IgG or
IgM) bind to antigens on the surface of specific cells or tissues, leading to destruction or
dysfunction.
3. A patient presents with a lack of intrinsic factor. Which type of anemia is most likely to
develop?
A. Iron deficiency anemia
B. Aplastic anemia
C. Hemolytic anemia
D. Pernicious anemia
Answer: D
Conceptual Explanation: Pernicious anemia is caused by a lack of intrinsic factor, which is
required for the absorption of vitamin B12 in the terminal ileum.
4. Which pathophysiological process occurs in the early stages of Diabetic Nephropathy?
A. Glomerular hypofiltration
B. Glomerular hyperfiltration and basement membrane thickening
C. Sudden decrease in serum creatinine
D. Destruction of the loop of Henle
, Answer: B
Conceptual Explanation: High blood glucose levels lead to glomerular hyperfiltration and
increased intraglomerular pressure, eventually causing basement membrane thickening
and microalbuminuria.
5. A patient with Grave’s disease will typically show which lab results?
A. High TSH and Low T4
B. Low TSH and High T4
C. Low TSH and Low T4
D. High TSH and High T4
Answer: B
Conceptual Explanation: In Grave’s disease (hyperthyroidism), thyroid-stimulating
immunoglobulins mimic TSH, causing excessive production of T4, which then provides
negative feedback to suppress pituitary TSH.
6. What is the hallmark physiological change in distributive shock, such as septic shock?
A. Decreased systemic vascular resistance due to vasodilation
B. Severe vasoconstriction
C. Increased systemic vascular resistance
D. High central venous pressure
Answer: A
