NUR 555 ADVANCED CLINICAL
PATHOPHYSIOLOGY EXAMINATION
QUESTIONS AND ANSWERS
1. Which cellular adaptation process is characterized by the replacement of one mature cell
type by another, often as a response to chronic irritation?
A. Metaplasia
B. Hyperplasia
C. Dysplasia
D. Atrophy
Answer: A
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
by another less mature cell type or a different cell type to better tolerate environmental
stressors.
2. In the context of acid-base balance, which of the following mechanisms is primarily
responsible for the compensation of metabolic acidosis?
A. Renal excretion of bicarbonate
,B. Hypoventilation to increase PaCO2
C. Hyperventilation to decrease PaCO2
D. Decreased renal ammonia production
Answer: C
Conceptual Explanation: The respiratory system compensates for metabolic acidosis by
increasing the rate and depth of ventilation (Kussmaul respirations) to blow off CO2,
thereby increasing the pH.
3. What is the primary pathophysiology underlying the development of Type 1 Diabetes
Mellitus?
A. Autoimmune destruction of pancreatic beta cells
B. Insulin resistance in peripheral tissues
C. Excessive glucagon secretion by alpha cells
D. Down-regulation of GLUT4 transporters
Answer: A
Conceptual Explanation: Type 1 Diabetes is primarily an autoimmune disease where T-
cell mediated destruction of insulin-producing beta cells in the pancreas leads to absolute
insulin deficiency.
, 4. During an inflammatory response, which plasma protein system results in the formation of
a fibrinous meshwork at an injured or inflamed site?
A. Coagulation system
B. Kinin system
C. Complement system
D. Fibrinolytic system
Answer: A
Conceptual Explanation: The coagulation (clotting) system forms a fibrinous meshwork
at an injured site to prevent the spread of infection, trap microorganisms, and provide a
framework for repair.
5. Which of the following best describes the role of the TP53 gene in cancer biology?
A. It is a proto-oncogene that stimulates cell growth
B. It codes for a growth factor receptor
C. It is a tumor suppressor gene that monitors DNA integrity
D. It prevents apoptosis in damaged cells
Answer: C
Conceptual Explanation: TP53 is a critical tumor suppressor gene that codes for the p53
protein, which can trigger DNA repair or initiate apoptosis if DNA damage is irreparable.
PATHOPHYSIOLOGY EXAMINATION
QUESTIONS AND ANSWERS
1. Which cellular adaptation process is characterized by the replacement of one mature cell
type by another, often as a response to chronic irritation?
A. Metaplasia
B. Hyperplasia
C. Dysplasia
D. Atrophy
Answer: A
Conceptual Explanation: Metaplasia is the reversible replacement of one mature cell type
by another less mature cell type or a different cell type to better tolerate environmental
stressors.
2. In the context of acid-base balance, which of the following mechanisms is primarily
responsible for the compensation of metabolic acidosis?
A. Renal excretion of bicarbonate
,B. Hypoventilation to increase PaCO2
C. Hyperventilation to decrease PaCO2
D. Decreased renal ammonia production
Answer: C
Conceptual Explanation: The respiratory system compensates for metabolic acidosis by
increasing the rate and depth of ventilation (Kussmaul respirations) to blow off CO2,
thereby increasing the pH.
3. What is the primary pathophysiology underlying the development of Type 1 Diabetes
Mellitus?
A. Autoimmune destruction of pancreatic beta cells
B. Insulin resistance in peripheral tissues
C. Excessive glucagon secretion by alpha cells
D. Down-regulation of GLUT4 transporters
Answer: A
Conceptual Explanation: Type 1 Diabetes is primarily an autoimmune disease where T-
cell mediated destruction of insulin-producing beta cells in the pancreas leads to absolute
insulin deficiency.
, 4. During an inflammatory response, which plasma protein system results in the formation of
a fibrinous meshwork at an injured or inflamed site?
A. Coagulation system
B. Kinin system
C. Complement system
D. Fibrinolytic system
Answer: A
Conceptual Explanation: The coagulation (clotting) system forms a fibrinous meshwork
at an injured site to prevent the spread of infection, trap microorganisms, and provide a
framework for repair.
5. Which of the following best describes the role of the TP53 gene in cancer biology?
A. It is a proto-oncogene that stimulates cell growth
B. It codes for a growth factor receptor
C. It is a tumor suppressor gene that monitors DNA integrity
D. It prevents apoptosis in damaged cells
Answer: C
Conceptual Explanation: TP53 is a critical tumor suppressor gene that codes for the p53
protein, which can trigger DNA repair or initiate apoptosis if DNA damage is irreparable.
