1. Which of the following best describes the primary mechanism of
action of nonsteroidal anti-inflammatory drugs (NSAIDs)?
A) Inhibition of cyclooxygenase (COX) enzymes
B) Activation of prostaglandin synthesis
C) Suppression of interleukin-6 (IL-6) production
D) Activation of nuclear factor-kappa B (NF-κB)
Answer: A) Inhibition of cyclooxygenase (COX) enzymes
Rationale:
NSAIDs exert their anti-inflammatory and analgesic effects primarily by
inhibiting cyclooxygenase enzymes (COX-1 and COX-2), which are
responsible for the conversion of arachidonic acid to prostaglandins.
Prostaglandins are mediators of inflammation, pain, and fever.
2. A 45-year-old male is diagnosed with cirrhosis of the liver. Which of
the following complications is most likely to occur in cirrhosis?
A) Hypoglycemia
B) Portal hypertension
C) Hypertension
D) Hypercalcemia
Answer: B) Portal hypertension
Rationale:
Portal hypertension is a common complication of cirrhosis due to
increased resistance to blood flow in the liver, which leads to elevated
pressure in the portal vein. This can result in varices, ascites, and
splenomegaly.
,3. In a patient with acute pancreatitis, which of the following enzymes
is most commonly elevated in the blood?
A) Amylase
B) Lipase
C) Alkaline phosphatase
D) Aspartate aminotransferase (AST)
Answer: B) Lipase
Rationale:
Lipase is more specific to the pancreas than amylase and remains
elevated longer during acute pancreatitis. It is the preferred enzyme to
measure when diagnosing acute pancreatitis.
4. Which of the following changes occurs in the kidneys during the
early stages of diabetic nephropathy?
A) Hyperfiltration
B) Proteinuria
C) Oliguria
D) Decreased glomerular filtration rate (GFR)
Answer: A) Hyperfiltration
Rationale:
In the early stages of diabetic nephropathy, hyperfiltration occurs as the
kidneys attempt to compensate for damage. Over time, this can lead to
glomerular injury, resulting in proteinuria and eventually a decreased
GFR.
, 5. A patient with rheumatoid arthritis develops a fever, malaise, and
swelling of the joints. Which of the following cytokines is most
implicated in the inflammatory process?
A) Tumor necrosis factor-alpha (TNF-α)
B) Interleukin-4 (IL-4)
C) Interferon-gamma (IFN-γ)
D) Interleukin-1 (IL-1)
Answer: A) Tumor necrosis factor-alpha (TNF-α)
Rationale:
TNF-α plays a key role in the pathogenesis of rheumatoid arthritis by
promoting inflammation, synovial proliferation, and cartilage
degradation. It is a target of many biologic therapies for this condition.
6. Which of the following is most likely to occur in response to a
severe allergic reaction (anaphylaxis)?
A) Vasoconstriction and decreased vascular permeability
B) Vasodilation and increased vascular permeability
C) Decreased heart rate and respiratory rate
D) Hyperkalemia and metabolic alkalosis
Answer: B) Vasodilation and increased vascular permeability
Rationale:
Anaphylaxis is characterized by a systemic release of histamine and
other mediators from mast cells, causing vasodilation and increased
vascular permeability. This leads to edema, hypotension, and shock.
7. Which of the following is the primary cause of the symptoms seen
in Graves' disease?
action of nonsteroidal anti-inflammatory drugs (NSAIDs)?
A) Inhibition of cyclooxygenase (COX) enzymes
B) Activation of prostaglandin synthesis
C) Suppression of interleukin-6 (IL-6) production
D) Activation of nuclear factor-kappa B (NF-κB)
Answer: A) Inhibition of cyclooxygenase (COX) enzymes
Rationale:
NSAIDs exert their anti-inflammatory and analgesic effects primarily by
inhibiting cyclooxygenase enzymes (COX-1 and COX-2), which are
responsible for the conversion of arachidonic acid to prostaglandins.
Prostaglandins are mediators of inflammation, pain, and fever.
2. A 45-year-old male is diagnosed with cirrhosis of the liver. Which of
the following complications is most likely to occur in cirrhosis?
A) Hypoglycemia
B) Portal hypertension
C) Hypertension
D) Hypercalcemia
Answer: B) Portal hypertension
Rationale:
Portal hypertension is a common complication of cirrhosis due to
increased resistance to blood flow in the liver, which leads to elevated
pressure in the portal vein. This can result in varices, ascites, and
splenomegaly.
,3. In a patient with acute pancreatitis, which of the following enzymes
is most commonly elevated in the blood?
A) Amylase
B) Lipase
C) Alkaline phosphatase
D) Aspartate aminotransferase (AST)
Answer: B) Lipase
Rationale:
Lipase is more specific to the pancreas than amylase and remains
elevated longer during acute pancreatitis. It is the preferred enzyme to
measure when diagnosing acute pancreatitis.
4. Which of the following changes occurs in the kidneys during the
early stages of diabetic nephropathy?
A) Hyperfiltration
B) Proteinuria
C) Oliguria
D) Decreased glomerular filtration rate (GFR)
Answer: A) Hyperfiltration
Rationale:
In the early stages of diabetic nephropathy, hyperfiltration occurs as the
kidneys attempt to compensate for damage. Over time, this can lead to
glomerular injury, resulting in proteinuria and eventually a decreased
GFR.
, 5. A patient with rheumatoid arthritis develops a fever, malaise, and
swelling of the joints. Which of the following cytokines is most
implicated in the inflammatory process?
A) Tumor necrosis factor-alpha (TNF-α)
B) Interleukin-4 (IL-4)
C) Interferon-gamma (IFN-γ)
D) Interleukin-1 (IL-1)
Answer: A) Tumor necrosis factor-alpha (TNF-α)
Rationale:
TNF-α plays a key role in the pathogenesis of rheumatoid arthritis by
promoting inflammation, synovial proliferation, and cartilage
degradation. It is a target of many biologic therapies for this condition.
6. Which of the following is most likely to occur in response to a
severe allergic reaction (anaphylaxis)?
A) Vasoconstriction and decreased vascular permeability
B) Vasodilation and increased vascular permeability
C) Decreased heart rate and respiratory rate
D) Hyperkalemia and metabolic alkalosis
Answer: B) Vasodilation and increased vascular permeability
Rationale:
Anaphylaxis is characterized by a systemic release of histamine and
other mediators from mast cells, causing vasodilation and increased
vascular permeability. This leads to edema, hypotension, and shock.
7. Which of the following is the primary cause of the symptoms seen
in Graves' disease?
