1. Which of the following is the primary mechanism of tissue injury in
acute inflammation?
A) Necrosis
B) Apoptosis
C) Release of inflammatory mediators
D) Increased cellular proliferation
Answer: C) Release of inflammatory mediators
Rationale: The primary mechanism in acute inflammation involves the
release of inflammatory mediators, such as cytokines, histamines, and
prostaglandins, which promote vasodilation, increased vascular
permeability, and the recruitment of immune cells to the site of injury
or infection. This results in tissue injury and the clinical signs of
inflammation (redness, swelling, heat, and pain).
2. In the context of cellular hypoxia, which of the following is the most
significant change?
A) Increased ATP production
B) Cellular swelling
C) Protein synthesis
D) Enhanced oxidative phosphorylation
Answer: B) Cellular swelling
Rationale: Hypoxia leads to a lack of oxygen, which impairs
mitochondrial oxidative phosphorylation, resulting in reduced ATP
production. This ATP depletion leads to failure of the sodium-potassium
pump, causing an influx of sodium and water into the cell, resulting in
cellular swelling.
,3. Which of the following best describes the pathophysiology of a
myocardial infarction (MI)?
A) Disruption of electrical conduction leading to arrhythmias
B) Complete occlusion of coronary arteries, causing ischemia and cell
death
C) Inflammation due to a viral infection of the heart muscle
D) Overproduction of catecholamines leading to vasodilation
Answer: B) Complete occlusion of coronary arteries, causing ischemia
and cell death
Rationale: Myocardial infarction (MI) occurs when there is a complete
or near-complete occlusion of a coronary artery, usually due to a
thrombus formed after a ruptured atherosclerotic plaque. This causes
ischemia and irreversible damage to the heart muscle, leading to cell
death.
4. The formation of a thrombus in deep veins in the lower extremities
is most commonly associated with:
A) Increased venous stasis
B) Increased platelet aggregation
C) Increased fibrinolysis
D) Decreased blood viscosity
Answer: A) Increased venous stasis
Rationale: Deep vein thrombosis (DVT) is most commonly associated
with increased venous stasis, which occurs when blood flow is slow or
stagnant, typically due to immobility, prolonged bed rest, or other
factors. This promotes clot formation in the veins, particularly in the
lower extremities.
, 5. Which of the following is the primary pathological feature of
chronic obstructive pulmonary disease (COPD)?
A) Mucus hypersecretion
B) Bronchial smooth muscle hypertrophy
C) Emphysema and alveolar destruction
D) Pulmonary fibrosis
Answer: C) Emphysema and alveolar destruction
Rationale: In COPD, the primary pathological features are emphysema
(destruction of the alveolar walls) and chronic bronchitis (mucus
hypersecretion and chronic inflammation). Emphysema results in loss of
elastic recoil, leading to airflow limitation and impaired gas exchange.
6. In the development of insulin resistance, which of the following
mechanisms is most directly responsible for the reduced effectiveness
of insulin?
A) Increased adipose tissue secretion of leptin
B) Altered glucose transporter function
C) Increased secretion of glucagon
D) Elevated cortisol levels
Answer: B) Altered glucose transporter function
Rationale: In insulin resistance, the function of glucose transporters
(specifically GLUT4) is impaired, which leads to decreased glucose
uptake by cells, particularly muscle and adipose tissue. This results in
elevated blood glucose levels and compensatory hyperinsulinemia.
acute inflammation?
A) Necrosis
B) Apoptosis
C) Release of inflammatory mediators
D) Increased cellular proliferation
Answer: C) Release of inflammatory mediators
Rationale: The primary mechanism in acute inflammation involves the
release of inflammatory mediators, such as cytokines, histamines, and
prostaglandins, which promote vasodilation, increased vascular
permeability, and the recruitment of immune cells to the site of injury
or infection. This results in tissue injury and the clinical signs of
inflammation (redness, swelling, heat, and pain).
2. In the context of cellular hypoxia, which of the following is the most
significant change?
A) Increased ATP production
B) Cellular swelling
C) Protein synthesis
D) Enhanced oxidative phosphorylation
Answer: B) Cellular swelling
Rationale: Hypoxia leads to a lack of oxygen, which impairs
mitochondrial oxidative phosphorylation, resulting in reduced ATP
production. This ATP depletion leads to failure of the sodium-potassium
pump, causing an influx of sodium and water into the cell, resulting in
cellular swelling.
,3. Which of the following best describes the pathophysiology of a
myocardial infarction (MI)?
A) Disruption of electrical conduction leading to arrhythmias
B) Complete occlusion of coronary arteries, causing ischemia and cell
death
C) Inflammation due to a viral infection of the heart muscle
D) Overproduction of catecholamines leading to vasodilation
Answer: B) Complete occlusion of coronary arteries, causing ischemia
and cell death
Rationale: Myocardial infarction (MI) occurs when there is a complete
or near-complete occlusion of a coronary artery, usually due to a
thrombus formed after a ruptured atherosclerotic plaque. This causes
ischemia and irreversible damage to the heart muscle, leading to cell
death.
4. The formation of a thrombus in deep veins in the lower extremities
is most commonly associated with:
A) Increased venous stasis
B) Increased platelet aggregation
C) Increased fibrinolysis
D) Decreased blood viscosity
Answer: A) Increased venous stasis
Rationale: Deep vein thrombosis (DVT) is most commonly associated
with increased venous stasis, which occurs when blood flow is slow or
stagnant, typically due to immobility, prolonged bed rest, or other
factors. This promotes clot formation in the veins, particularly in the
lower extremities.
, 5. Which of the following is the primary pathological feature of
chronic obstructive pulmonary disease (COPD)?
A) Mucus hypersecretion
B) Bronchial smooth muscle hypertrophy
C) Emphysema and alveolar destruction
D) Pulmonary fibrosis
Answer: C) Emphysema and alveolar destruction
Rationale: In COPD, the primary pathological features are emphysema
(destruction of the alveolar walls) and chronic bronchitis (mucus
hypersecretion and chronic inflammation). Emphysema results in loss of
elastic recoil, leading to airflow limitation and impaired gas exchange.
6. In the development of insulin resistance, which of the following
mechanisms is most directly responsible for the reduced effectiveness
of insulin?
A) Increased adipose tissue secretion of leptin
B) Altered glucose transporter function
C) Increased secretion of glucagon
D) Elevated cortisol levels
Answer: B) Altered glucose transporter function
Rationale: In insulin resistance, the function of glucose transporters
(specifically GLUT4) is impaired, which leads to decreased glucose
uptake by cells, particularly muscle and adipose tissue. This results in
elevated blood glucose levels and compensatory hyperinsulinemia.
