1. Which of the following best describes the primary
pathophysiological mechanism in acute respiratory distress syndrome
(ARDS)?
A) Increased airway resistance
B) Pulmonary vasodilation
C) Alveolar damage with increased permeability
D) Decreased pulmonary blood flow
Answer: C) Alveolar damage with increased permeability
Rationale: ARDS is characterized by damage to the alveolar-capillary
membrane, leading to increased permeability and fluid accumulation in
the alveoli. This disrupts normal gas exchange and can result in
hypoxemia.
2. In myocardial infarction (MI), the development of ischemia leads to
which of the following cellular changes?
A) Increased ATP production
B) Increased cellular pH
C) Cellular swelling and lactic acid accumulation
D) Increased protein synthesis
Answer: C) Cellular swelling and lactic acid accumulation
Rationale: In MI, oxygen deprivation leads to anaerobic metabolism,
causing the accumulation of lactic acid and a decrease in ATP
production. This results in cellular swelling due to disrupted ion pumps
and electrolyte imbalances.
3. In sepsis, what is the primary cause of the decreased blood pressure
observed in affected patients?
,A) Increased blood volume
B) Vasodilation due to inflammatory mediators
C) Myocardial infarction
D) Excessive sympathetic nervous system activation
Answer: B) Vasodilation due to inflammatory mediators
Rationale: Sepsis causes the release of inflammatory mediators (like
cytokines and nitric oxide) that induce widespread vasodilation, leading
to decreased systemic vascular resistance and hypotension.
4. Which of the following is the most common mechanism of injury in
a patient with cirrhosis of the liver?
A) Direct bacterial infection
B) Chronic inflammation and fibrosis
C) Increased erythropoiesis
D) Vitamin D deficiency
Answer: B) Chronic inflammation and fibrosis
Rationale: Cirrhosis is primarily caused by chronic liver injury, often due
to factors like alcohol abuse or hepatitis, leading to ongoing
inflammation and fibrosis. Over time, this disrupts liver architecture and
function.
5. In diabetic ketoacidosis (DKA), which of the following metabolic
disturbances is primarily responsible for the acidosis?
A) Lactic acid buildup
B) Decreased renal excretion of acid
C) Accumulation of ketones (acetoacetate and beta-hydroxybutyrate)
D) Increased production of carbonic acid
, Answer: C) Accumulation of ketones (acetoacetate and beta-
hydroxybutyrate)
Rationale: In DKA, insulin deficiency and glucose intolerance lead to fat
breakdown, producing ketones that accumulate in the blood. These
ketones are acidic and contribute to the metabolic acidosis seen in DKA.
6. Which of the following changes in the cardiovascular system is most
commonly seen in chronic hypertension?
A) Decreased myocardial oxygen demand
B) Left ventricular hypertrophy
C) Decreased heart rate
D) Decreased systolic blood pressure
Answer: B) Left ventricular hypertrophy
Rationale: Chronic hypertension causes increased afterload on the
heart, leading to left ventricular hypertrophy as the heart works harder
to overcome the elevated blood pressure.
7. In which of the following conditions would you expect to see the
"Butterfly rash" as a key diagnostic feature?
A) Systemic lupus erythematosus (SLE)
B) Rheumatoid arthritis
C) Psoriasis
D) Myasthenia gravis
Answer: A) Systemic lupus erythematosus (SLE)
Rationale: A characteristic feature of SLE is the "butterfly rash," which
appears across the cheeks and nose. It is a common manifestation of
the autoimmune disease, often triggered by sun exposure.
pathophysiological mechanism in acute respiratory distress syndrome
(ARDS)?
A) Increased airway resistance
B) Pulmonary vasodilation
C) Alveolar damage with increased permeability
D) Decreased pulmonary blood flow
Answer: C) Alveolar damage with increased permeability
Rationale: ARDS is characterized by damage to the alveolar-capillary
membrane, leading to increased permeability and fluid accumulation in
the alveoli. This disrupts normal gas exchange and can result in
hypoxemia.
2. In myocardial infarction (MI), the development of ischemia leads to
which of the following cellular changes?
A) Increased ATP production
B) Increased cellular pH
C) Cellular swelling and lactic acid accumulation
D) Increased protein synthesis
Answer: C) Cellular swelling and lactic acid accumulation
Rationale: In MI, oxygen deprivation leads to anaerobic metabolism,
causing the accumulation of lactic acid and a decrease in ATP
production. This results in cellular swelling due to disrupted ion pumps
and electrolyte imbalances.
3. In sepsis, what is the primary cause of the decreased blood pressure
observed in affected patients?
,A) Increased blood volume
B) Vasodilation due to inflammatory mediators
C) Myocardial infarction
D) Excessive sympathetic nervous system activation
Answer: B) Vasodilation due to inflammatory mediators
Rationale: Sepsis causes the release of inflammatory mediators (like
cytokines and nitric oxide) that induce widespread vasodilation, leading
to decreased systemic vascular resistance and hypotension.
4. Which of the following is the most common mechanism of injury in
a patient with cirrhosis of the liver?
A) Direct bacterial infection
B) Chronic inflammation and fibrosis
C) Increased erythropoiesis
D) Vitamin D deficiency
Answer: B) Chronic inflammation and fibrosis
Rationale: Cirrhosis is primarily caused by chronic liver injury, often due
to factors like alcohol abuse or hepatitis, leading to ongoing
inflammation and fibrosis. Over time, this disrupts liver architecture and
function.
5. In diabetic ketoacidosis (DKA), which of the following metabolic
disturbances is primarily responsible for the acidosis?
A) Lactic acid buildup
B) Decreased renal excretion of acid
C) Accumulation of ketones (acetoacetate and beta-hydroxybutyrate)
D) Increased production of carbonic acid
, Answer: C) Accumulation of ketones (acetoacetate and beta-
hydroxybutyrate)
Rationale: In DKA, insulin deficiency and glucose intolerance lead to fat
breakdown, producing ketones that accumulate in the blood. These
ketones are acidic and contribute to the metabolic acidosis seen in DKA.
6. Which of the following changes in the cardiovascular system is most
commonly seen in chronic hypertension?
A) Decreased myocardial oxygen demand
B) Left ventricular hypertrophy
C) Decreased heart rate
D) Decreased systolic blood pressure
Answer: B) Left ventricular hypertrophy
Rationale: Chronic hypertension causes increased afterload on the
heart, leading to left ventricular hypertrophy as the heart works harder
to overcome the elevated blood pressure.
7. In which of the following conditions would you expect to see the
"Butterfly rash" as a key diagnostic feature?
A) Systemic lupus erythematosus (SLE)
B) Rheumatoid arthritis
C) Psoriasis
D) Myasthenia gravis
Answer: A) Systemic lupus erythematosus (SLE)
Rationale: A characteristic feature of SLE is the "butterfly rash," which
appears across the cheeks and nose. It is a common manifestation of
the autoimmune disease, often triggered by sun exposure.
