1. Question:
A patient presents with edema, ascites, and jaundice. Laboratory results
show elevated serum bilirubin and liver enzymes (ALT, AST). Which of
the following conditions is most likely to be the cause of these
symptoms?
A. Cirrhosis
B. Acute pancreatitis
C. Acute renal failure
D. Hyperthyroidism
Answer:
A. Cirrhosis
Rationale:
Cirrhosis is a chronic liver disease that leads to scarring and impaired
liver function, which can cause symptoms such as jaundice (due to
impaired bilirubin metabolism), edema, and ascites (due to portal
hypertension and hypoalbuminemia). The elevated liver enzymes (ALT,
AST) further support liver dysfunction.
2. Question:
In diabetic ketoacidosis (DKA), what is the primary cause of metabolic
acidosis?
A. Increased lactate production
B. Decreased renal excretion of hydrogen ions
C. Increased production of ketone bodies
D. Decreased bicarbonate production by the kidneys
Answer:
C. Increased production of ketone bodies
,Rationale:
In DKA, the lack of insulin leads to increased lipolysis and the
production of ketone bodies (acetoacetate and β-hydroxybutyrate),
which are acidic and accumulate in the blood. This results in metabolic
acidosis. The decreased bicarbonate concentration is a compensatory
response to buffer the acidosis.
3. Question:
Which of the following is most directly associated with the
pathophysiology of acute respiratory distress syndrome (ARDS)?
A. Pulmonary vasoconstriction
B. Disruption of the blood-brain barrier
C. Alveolar-capillary membrane injury
D. Airway obstruction
Answer:
C. Alveolar-capillary membrane injury
Rationale:
ARDS is characterized by inflammation and injury to the alveolar-
capillary membrane, which leads to increased permeability. This results
in fluid leakage into the alveoli, impairing gas exchange and causing
hypoxemia.
4. Question:
Which of the following is a characteristic feature of
hyperparathyroidism?
A. Decreased serum calcium levels
B. Decreased serum phosphate levels
, C. Increased bone density
D. Decreased production of parathyroid hormone
Answer:
B. Decreased serum phosphate levels
Rationale:
Hyperparathyroidism results in increased parathyroid hormone (PTH)
production, which increases calcium levels by promoting bone
resorption, renal calcium reabsorption, and intestinal calcium
absorption. It also decreases phosphate levels by promoting renal
phosphate excretion.
5. Question:
Which of the following is a common pathophysiologic mechanism in the
development of atherosclerosis?
A. Endothelial injury and inflammation
B. Decreased blood pressure in the arteries
C. Decreased cholesterol levels
D. Hyperthyroidism
Answer:
A. Endothelial injury and inflammation
Rationale:
Atherosclerosis begins with endothelial injury due to factors such as
high blood pressure, smoking, and high cholesterol. This injury triggers
an inflammatory response that leads to the formation of plaques
composed of lipids, smooth muscle cells, and inflammatory cells,
narrowing the arteries and leading to cardiovascular complications.
A patient presents with edema, ascites, and jaundice. Laboratory results
show elevated serum bilirubin and liver enzymes (ALT, AST). Which of
the following conditions is most likely to be the cause of these
symptoms?
A. Cirrhosis
B. Acute pancreatitis
C. Acute renal failure
D. Hyperthyroidism
Answer:
A. Cirrhosis
Rationale:
Cirrhosis is a chronic liver disease that leads to scarring and impaired
liver function, which can cause symptoms such as jaundice (due to
impaired bilirubin metabolism), edema, and ascites (due to portal
hypertension and hypoalbuminemia). The elevated liver enzymes (ALT,
AST) further support liver dysfunction.
2. Question:
In diabetic ketoacidosis (DKA), what is the primary cause of metabolic
acidosis?
A. Increased lactate production
B. Decreased renal excretion of hydrogen ions
C. Increased production of ketone bodies
D. Decreased bicarbonate production by the kidneys
Answer:
C. Increased production of ketone bodies
,Rationale:
In DKA, the lack of insulin leads to increased lipolysis and the
production of ketone bodies (acetoacetate and β-hydroxybutyrate),
which are acidic and accumulate in the blood. This results in metabolic
acidosis. The decreased bicarbonate concentration is a compensatory
response to buffer the acidosis.
3. Question:
Which of the following is most directly associated with the
pathophysiology of acute respiratory distress syndrome (ARDS)?
A. Pulmonary vasoconstriction
B. Disruption of the blood-brain barrier
C. Alveolar-capillary membrane injury
D. Airway obstruction
Answer:
C. Alveolar-capillary membrane injury
Rationale:
ARDS is characterized by inflammation and injury to the alveolar-
capillary membrane, which leads to increased permeability. This results
in fluid leakage into the alveoli, impairing gas exchange and causing
hypoxemia.
4. Question:
Which of the following is a characteristic feature of
hyperparathyroidism?
A. Decreased serum calcium levels
B. Decreased serum phosphate levels
, C. Increased bone density
D. Decreased production of parathyroid hormone
Answer:
B. Decreased serum phosphate levels
Rationale:
Hyperparathyroidism results in increased parathyroid hormone (PTH)
production, which increases calcium levels by promoting bone
resorption, renal calcium reabsorption, and intestinal calcium
absorption. It also decreases phosphate levels by promoting renal
phosphate excretion.
5. Question:
Which of the following is a common pathophysiologic mechanism in the
development of atherosclerosis?
A. Endothelial injury and inflammation
B. Decreased blood pressure in the arteries
C. Decreased cholesterol levels
D. Hyperthyroidism
Answer:
A. Endothelial injury and inflammation
Rationale:
Atherosclerosis begins with endothelial injury due to factors such as
high blood pressure, smoking, and high cholesterol. This injury triggers
an inflammatory response that leads to the formation of plaques
composed of lipids, smooth muscle cells, and inflammatory cells,
narrowing the arteries and leading to cardiovascular complications.
