1. Which of the following is the most likely cause of acute respiratory
distress syndrome (ARDS)?
A) Pulmonary embolism
B) Pneumonia
C) Acute myocardial infarction
D) Chronic obstructive pulmonary disease (COPD)
Answer: B) Pneumonia
Rationale: ARDS is often triggered by direct injury to the lungs, with
pneumonia being one of the most common causes. The inflammatory
response leads to alveolar damage, increased permeability of the
blood-air barrier, and impaired gas exchange.
2. In the pathophysiology of diabetes mellitus type 1, which of the
following is the primary defect?
A) Insulin resistance
B) Destruction of pancreatic beta cells
C) Increased glucagon secretion
D) Excessive production of cortisol
Answer: B) Destruction of pancreatic beta cells
Rationale: Type 1 diabetes is an autoimmune disorder where the
immune system attacks and destroys the insulin-producing beta cells in
the pancreas, leading to a deficiency in insulin.
3. Which of the following is most characteristic of an autoimmune
disease like systemic lupus erythematosus (SLE)?
,A) Elevated cortisol levels
B) Antibody production against self-antigens
C) Impaired production of antibodies
D) Overproduction of red blood cells
Answer: B) Antibody production against self-antigens
Rationale: In autoimmune diseases like SLE, the body’s immune system
mistakenly attacks its own tissues, producing antibodies against self-
antigens. This leads to inflammation and damage in various organs.
4. Which of the following laboratory findings is most commonly seen
in a patient with chronic renal failure?
A) Hyperkalemia
B) Hypocalcemia
C) Hyperglycemia
D) Hypokalemia
Answer: A) Hyperkalemia
Rationale: Chronic renal failure impairs the kidneys' ability to excrete
potassium, leading to hyperkalemia, which can be life-threatening if
untreated. Hypocalcemia is also common due to decreased kidney
function, but hyperkalemia is more prominent.
5. In the pathophysiology of hypertension, which of the following
mechanisms primarily contributes to increased vascular resistance?
A) Vasodilation
B) Increased sympathetic nervous system activity
C) Decreased angiotensin II levels
D) Reduced cardiac output
, Answer: B) Increased sympathetic nervous system activity
Rationale: Increased sympathetic nervous system activity leads to
vasoconstriction and elevated blood pressure by stimulating alpha-
adrenergic receptors in the blood vessels, contributing to increased
vascular resistance.
6. Which of the following is the primary cause of the symptoms seen
in a patient with Addison's disease?
A) Excess aldosterone production
B) Insufficient cortisol and aldosterone production
C) Excessive thyroid hormone production
D) Increased blood glucose levels
Answer: B) Insufficient cortisol and aldosterone production
Rationale: Addison’s disease is caused by the destruction of the adrenal
cortex, leading to insufficient production of cortisol and aldosterone,
which causes symptoms like fatigue, weight loss, hypotension, and
electrolyte imbalances.
7. In patients with cirrhosis, which of the following is most likely to
result from portal hypertension?
A) Hypercalcemia
B) Ascites
C) Hyperglycemia
D) Hypotension
Answer: B) Ascites
distress syndrome (ARDS)?
A) Pulmonary embolism
B) Pneumonia
C) Acute myocardial infarction
D) Chronic obstructive pulmonary disease (COPD)
Answer: B) Pneumonia
Rationale: ARDS is often triggered by direct injury to the lungs, with
pneumonia being one of the most common causes. The inflammatory
response leads to alveolar damage, increased permeability of the
blood-air barrier, and impaired gas exchange.
2. In the pathophysiology of diabetes mellitus type 1, which of the
following is the primary defect?
A) Insulin resistance
B) Destruction of pancreatic beta cells
C) Increased glucagon secretion
D) Excessive production of cortisol
Answer: B) Destruction of pancreatic beta cells
Rationale: Type 1 diabetes is an autoimmune disorder where the
immune system attacks and destroys the insulin-producing beta cells in
the pancreas, leading to a deficiency in insulin.
3. Which of the following is most characteristic of an autoimmune
disease like systemic lupus erythematosus (SLE)?
,A) Elevated cortisol levels
B) Antibody production against self-antigens
C) Impaired production of antibodies
D) Overproduction of red blood cells
Answer: B) Antibody production against self-antigens
Rationale: In autoimmune diseases like SLE, the body’s immune system
mistakenly attacks its own tissues, producing antibodies against self-
antigens. This leads to inflammation and damage in various organs.
4. Which of the following laboratory findings is most commonly seen
in a patient with chronic renal failure?
A) Hyperkalemia
B) Hypocalcemia
C) Hyperglycemia
D) Hypokalemia
Answer: A) Hyperkalemia
Rationale: Chronic renal failure impairs the kidneys' ability to excrete
potassium, leading to hyperkalemia, which can be life-threatening if
untreated. Hypocalcemia is also common due to decreased kidney
function, but hyperkalemia is more prominent.
5. In the pathophysiology of hypertension, which of the following
mechanisms primarily contributes to increased vascular resistance?
A) Vasodilation
B) Increased sympathetic nervous system activity
C) Decreased angiotensin II levels
D) Reduced cardiac output
, Answer: B) Increased sympathetic nervous system activity
Rationale: Increased sympathetic nervous system activity leads to
vasoconstriction and elevated blood pressure by stimulating alpha-
adrenergic receptors in the blood vessels, contributing to increased
vascular resistance.
6. Which of the following is the primary cause of the symptoms seen
in a patient with Addison's disease?
A) Excess aldosterone production
B) Insufficient cortisol and aldosterone production
C) Excessive thyroid hormone production
D) Increased blood glucose levels
Answer: B) Insufficient cortisol and aldosterone production
Rationale: Addison’s disease is caused by the destruction of the adrenal
cortex, leading to insufficient production of cortisol and aldosterone,
which causes symptoms like fatigue, weight loss, hypotension, and
electrolyte imbalances.
7. In patients with cirrhosis, which of the following is most likely to
result from portal hypertension?
A) Hypercalcemia
B) Ascites
C) Hyperglycemia
D) Hypotension
Answer: B) Ascites
