1. Which of the following is the primary mechanism responsible for
the edema seen in inflammation?
a) Increased capillary permeability
b) Increased capillary hydrostatic pressure
c) Lymphatic obstruction
d) Decreased plasma protein concentration
Answer: a) Increased capillary permeability
Rationale: Inflammation leads to the release of inflammatory mediators
(e.g., histamine, bradykinin), which increase capillary permeability,
allowing proteins and fluid to leak into the interstitial space, causing
edema.
2. Which of the following is a characteristic feature of reversible cell
injury?
a) Irreversible mitochondrial damage
b) Plasma membrane rupture
c) Cellular swelling and fatty change
d) Necrosis and inflammation
Answer: c) Cellular swelling and fatty change
Rationale: Reversible cell injury often presents with cellular swelling
(due to water influx) and fatty change (especially in the liver), which can
be repaired if the damaging stimulus is removed.
3. What is the pathophysiologic mechanism underlying the
development of pulmonary edema in left-sided heart failure?
a) Decreased oncotic pressure in the alveoli
b) Increased hydrostatic pressure in the pulmonary capillaries
,c) Increased production of surfactant
d) Decreased perfusion of the lungs
Answer: b) Increased hydrostatic pressure in the pulmonary capillaries
Rationale: Left-sided heart failure leads to reduced cardiac output and
increased pressure in the left atrium, which then transmits to the
pulmonary vasculature. This increased hydrostatic pressure causes fluid
to leak into the alveoli, leading to pulmonary edema.
4. The hallmark of metabolic acidosis is a
a) Decrease in blood pH and a decrease in bicarbonate concentration
b) Decrease in blood pH and an increase in bicarbonate concentration
c) Increase in blood pH and a decrease in bicarbonate concentration
d) Increase in blood pH and an increase in bicarbonate concentration
Answer: a) Decrease in blood pH and a decrease in bicarbonate
concentration
Rationale: Metabolic acidosis is characterized by a decrease in blood pH
due to an increase in acid production or a loss of bicarbonate, resulting
in a reduction of bicarbonate concentration.
5. Which of the following is a feature of an anaphylactic reaction?
a) Slow onset with gradual increase in symptoms
b) IgE-mediated release of histamine and other mediators
c) Complement activation in the absence of IgE
d) Delayed hypersensitivity response involving T-cells
Answer: b) IgE-mediated release of histamine and other mediators
Rationale: Anaphylaxis is an immediate hypersensitivity reaction that is
triggered by the release of histamine and other mediators from mast
cells and basophils in response to IgE binding on their surfaces.
, 6. In the development of atherosclerosis, which of the following plays
a key role in the initial lesion formation?
a) Endothelial injury and dysfunction
b) Macrophage apoptosis
c) Lymphocyte infiltration
d) Epithelial proliferation
Answer: a) Endothelial injury and dysfunction
Rationale: Atherosclerosis begins with endothelial injury that allows
low-density lipoprotein (LDL) particles to accumulate in the vessel wall.
This triggers inflammatory responses, leading to plaque formation.
7. In which of the following conditions is hyperkalemia a common
finding?
a) Chronic diarrhea
b) Hyperaldosteronism
c) Acute renal failure
d) Hypothyroidism
Answer: c) Acute renal failure
Rationale: In acute renal failure, the kidneys are unable to excrete
potassium efficiently, leading to an accumulation of potassium in the
blood, causing hyperkalemia.
8. A patient presents with jaundice, abdominal pain, and fever. Which
of the following is the most likely pathophysiologic cause of these
symptoms?
a) Hemolytic anemia
b) Hepatitis infection
the edema seen in inflammation?
a) Increased capillary permeability
b) Increased capillary hydrostatic pressure
c) Lymphatic obstruction
d) Decreased plasma protein concentration
Answer: a) Increased capillary permeability
Rationale: Inflammation leads to the release of inflammatory mediators
(e.g., histamine, bradykinin), which increase capillary permeability,
allowing proteins and fluid to leak into the interstitial space, causing
edema.
2. Which of the following is a characteristic feature of reversible cell
injury?
a) Irreversible mitochondrial damage
b) Plasma membrane rupture
c) Cellular swelling and fatty change
d) Necrosis and inflammation
Answer: c) Cellular swelling and fatty change
Rationale: Reversible cell injury often presents with cellular swelling
(due to water influx) and fatty change (especially in the liver), which can
be repaired if the damaging stimulus is removed.
3. What is the pathophysiologic mechanism underlying the
development of pulmonary edema in left-sided heart failure?
a) Decreased oncotic pressure in the alveoli
b) Increased hydrostatic pressure in the pulmonary capillaries
,c) Increased production of surfactant
d) Decreased perfusion of the lungs
Answer: b) Increased hydrostatic pressure in the pulmonary capillaries
Rationale: Left-sided heart failure leads to reduced cardiac output and
increased pressure in the left atrium, which then transmits to the
pulmonary vasculature. This increased hydrostatic pressure causes fluid
to leak into the alveoli, leading to pulmonary edema.
4. The hallmark of metabolic acidosis is a
a) Decrease in blood pH and a decrease in bicarbonate concentration
b) Decrease in blood pH and an increase in bicarbonate concentration
c) Increase in blood pH and a decrease in bicarbonate concentration
d) Increase in blood pH and an increase in bicarbonate concentration
Answer: a) Decrease in blood pH and a decrease in bicarbonate
concentration
Rationale: Metabolic acidosis is characterized by a decrease in blood pH
due to an increase in acid production or a loss of bicarbonate, resulting
in a reduction of bicarbonate concentration.
5. Which of the following is a feature of an anaphylactic reaction?
a) Slow onset with gradual increase in symptoms
b) IgE-mediated release of histamine and other mediators
c) Complement activation in the absence of IgE
d) Delayed hypersensitivity response involving T-cells
Answer: b) IgE-mediated release of histamine and other mediators
Rationale: Anaphylaxis is an immediate hypersensitivity reaction that is
triggered by the release of histamine and other mediators from mast
cells and basophils in response to IgE binding on their surfaces.
, 6. In the development of atherosclerosis, which of the following plays
a key role in the initial lesion formation?
a) Endothelial injury and dysfunction
b) Macrophage apoptosis
c) Lymphocyte infiltration
d) Epithelial proliferation
Answer: a) Endothelial injury and dysfunction
Rationale: Atherosclerosis begins with endothelial injury that allows
low-density lipoprotein (LDL) particles to accumulate in the vessel wall.
This triggers inflammatory responses, leading to plaque formation.
7. In which of the following conditions is hyperkalemia a common
finding?
a) Chronic diarrhea
b) Hyperaldosteronism
c) Acute renal failure
d) Hypothyroidism
Answer: c) Acute renal failure
Rationale: In acute renal failure, the kidneys are unable to excrete
potassium efficiently, leading to an accumulation of potassium in the
blood, causing hyperkalemia.
8. A patient presents with jaundice, abdominal pain, and fever. Which
of the following is the most likely pathophysiologic cause of these
symptoms?
a) Hemolytic anemia
b) Hepatitis infection
