,NSG 533 Exam 1 | Advanced Pharmacology | Wilkes
University | Q & A | 2026/2027 Edition (PDF)
1. Which of the following best describes the five essential components of pathophysiology?
A) Etiology, epidemiology, pathogenesis, clinical manifestations, and outcomes
B) Etiology, diagnosis, treatment, prognosis, and prevention
C) Pathogenesis, clinical presentation, diagnostic testing, treatment, and follow-up
D) Epidemiology, risk factors, signs, symptoms, and mortality
Correct Answer: Etiology, epidemiology, pathogenesis, clinical manifestations, and outcomes
Expert Rationale: The five core components of pathophysiology are etiology (cause), epidemiology
(population patterns), pathogenesis (disease mechanism), clinical manifestations (signs/symptoms), and
outcomes (cure, remission, chronicity, or death). These elements provide a comprehensive framework
for understanding disease processes from origin to resolution.
---
2. What is the primary function of the Na⁺-K⁺-ATPase pump in maintaining cellular homeostasis?
A) It transports sodium out of the cell and potassium into the cell using ATP
B) It transports potassium out of the cell and sodium into the cell using ATP
C) It maintains equal concentrations of sodium and potassium inside and outside the cell
D) It facilitates passive diffusion of water across the cell membrane
Correct Answer: It transports sodium out of the cell and potassium into the cell using ATP
Expert Rationale: The Na⁺-K⁺-ATPase pump actively transports three sodium ions out of the cell and two
potassium ions into the cell, consuming ATP. This maintains the electrochemical gradient essential for
cellular volume control, nerve impulse transmission, and secondary active transport.
---
,3. According to the principles of cell injury, which mechanism is most directly associated with
ischemia-induced hypoxic injury?
A) Accumulation of oxygen-derived free radicals
B) ATP depletion leading to failure of membrane pumps
C) Defects in membrane permeability from direct chemical injury
D) Intracellular calcium loss from mitochondrial damage
Correct Answer: ATP depletion leading to failure of membrane pumps
Expert Rationale: Ischemia reduces oxygen delivery, decreasing mitochondrial ATP production. ATP
depletion causes the Na⁺-K⁺-ATPase pump to fail, leading to intracellular sodium and water
accumulation, cellular swelling, and ultimately irreversible injury if perfusion is not restored.
---
4. Which term refers to the sequence of events occurring between the initial stimulus and the clinical
manifestations of a disease?
A) Etiology
B) Epidemiology
C) Pathogenesis
D) Outcomes
Correct Answer: Pathogenesis
Expert Rationale: Pathogenesis describes the step-by-step biological mechanism by which a disease
develops from its initial cause to its clinical expression. It bridges etiology (the "why") and clinical
manifestations (the "what"), explaining how cellular and molecular changes produce observable signs
and symptoms.
---
, 5. A researcher is studying the distribution of a new infectious disease across different age groups and
geographic regions. Which component of pathophysiology is being examined?
A) Etiology
B) Epidemiology
C) Pathogenesis
D) Clinical manifestations
Correct Answer: Epidemiology
Expert Rationale: Epidemiology examines disease patterns among populations, including relationships
between characteristics such as age, ethnicity, socioeconomic status, and geographic location and the
incidence and prevalence of disease. This population-level analysis is distinct from the individual-level
focus of other pathophysiology components.
---
6. What is the most likely outcome if a cell experiences prolonged ATP depletion without restoration of
oxygen supply?
A) Reversible cellular swelling
B) Activation of apoptosis
C) Irreversible cell injury and necrosis
D) Cellular hypertrophy
Correct Answer: Irreversible cell injury and necrosis
Expert Rationale: Prolonged ATP depletion leads to failure of membrane pumps, calcium influx, loss of
membrane integrity, and leakage of cellular contents. These changes are irreversible and result in cell
death, typically by necrosis, characterized by inflammation and disruption of surrounding tissue.
---
University | Q & A | 2026/2027 Edition (PDF)
1. Which of the following best describes the five essential components of pathophysiology?
A) Etiology, epidemiology, pathogenesis, clinical manifestations, and outcomes
B) Etiology, diagnosis, treatment, prognosis, and prevention
C) Pathogenesis, clinical presentation, diagnostic testing, treatment, and follow-up
D) Epidemiology, risk factors, signs, symptoms, and mortality
Correct Answer: Etiology, epidemiology, pathogenesis, clinical manifestations, and outcomes
Expert Rationale: The five core components of pathophysiology are etiology (cause), epidemiology
(population patterns), pathogenesis (disease mechanism), clinical manifestations (signs/symptoms), and
outcomes (cure, remission, chronicity, or death). These elements provide a comprehensive framework
for understanding disease processes from origin to resolution.
---
2. What is the primary function of the Na⁺-K⁺-ATPase pump in maintaining cellular homeostasis?
A) It transports sodium out of the cell and potassium into the cell using ATP
B) It transports potassium out of the cell and sodium into the cell using ATP
C) It maintains equal concentrations of sodium and potassium inside and outside the cell
D) It facilitates passive diffusion of water across the cell membrane
Correct Answer: It transports sodium out of the cell and potassium into the cell using ATP
Expert Rationale: The Na⁺-K⁺-ATPase pump actively transports three sodium ions out of the cell and two
potassium ions into the cell, consuming ATP. This maintains the electrochemical gradient essential for
cellular volume control, nerve impulse transmission, and secondary active transport.
---
,3. According to the principles of cell injury, which mechanism is most directly associated with
ischemia-induced hypoxic injury?
A) Accumulation of oxygen-derived free radicals
B) ATP depletion leading to failure of membrane pumps
C) Defects in membrane permeability from direct chemical injury
D) Intracellular calcium loss from mitochondrial damage
Correct Answer: ATP depletion leading to failure of membrane pumps
Expert Rationale: Ischemia reduces oxygen delivery, decreasing mitochondrial ATP production. ATP
depletion causes the Na⁺-K⁺-ATPase pump to fail, leading to intracellular sodium and water
accumulation, cellular swelling, and ultimately irreversible injury if perfusion is not restored.
---
4. Which term refers to the sequence of events occurring between the initial stimulus and the clinical
manifestations of a disease?
A) Etiology
B) Epidemiology
C) Pathogenesis
D) Outcomes
Correct Answer: Pathogenesis
Expert Rationale: Pathogenesis describes the step-by-step biological mechanism by which a disease
develops from its initial cause to its clinical expression. It bridges etiology (the "why") and clinical
manifestations (the "what"), explaining how cellular and molecular changes produce observable signs
and symptoms.
---
, 5. A researcher is studying the distribution of a new infectious disease across different age groups and
geographic regions. Which component of pathophysiology is being examined?
A) Etiology
B) Epidemiology
C) Pathogenesis
D) Clinical manifestations
Correct Answer: Epidemiology
Expert Rationale: Epidemiology examines disease patterns among populations, including relationships
between characteristics such as age, ethnicity, socioeconomic status, and geographic location and the
incidence and prevalence of disease. This population-level analysis is distinct from the individual-level
focus of other pathophysiology components.
---
6. What is the most likely outcome if a cell experiences prolonged ATP depletion without restoration of
oxygen supply?
A) Reversible cellular swelling
B) Activation of apoptosis
C) Irreversible cell injury and necrosis
D) Cellular hypertrophy
Correct Answer: Irreversible cell injury and necrosis
Expert Rationale: Prolonged ATP depletion leads to failure of membrane pumps, calcium influx, loss of
membrane integrity, and leakage of cellular contents. These changes are irreversible and result in cell
death, typically by necrosis, characterized by inflammation and disruption of surrounding tissue.
---
