Comprehensive Pathophysiology Final Exam &
WGU D236 Practice Exam
65 Exam-Style Questions • Multiple Body Systems • Detailed Rationales • Case-Based
Clinical Scenarios
Instructions:
• Rationales are provided after each section.
• Topics include cardiovascular, respiratory, endocrine, renal, neurologic, immune, and
multisystem disorders.
1. Which process best describes homeostasis?
A. Progressive organ dysfunction
B. Maintenance of internal stability
C. Cellular destruction by toxins
D. Increased sympathetic activity
Correct Answer: B
Rationale: Homeostasis refers to maintaining a stable internal environment.
2. Which mediator primarily increases body temperature during infection?
A. Histamine
B. Cytokines
C. Sodium
D. Albumin
Correct Answer: B
Rationale: Cytokines released during infection stimulate fever production.
3. Which cellular adaptation occurs when skeletal muscle enlarges after exercise?
A. Dysplasia
B. Hyperplasia
C. Hypertrophy
D. Metaplasia
Correct Answer: C
Rationale: Hypertrophy is enlargement of existing cells.
4. Which acid-base imbalance is caused by hyperventilation?
A. Respiratory acidosis
, B. Metabolic acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis
Correct Answer: C
Rationale: Hyperventilation lowers carbon dioxide levels causing respiratory alkalosis.
5. Which condition is strongly associated with cigarette smoking?
A. COPD
B. Appendicitis
C. Migraine
D. Osteoporosis
Correct Answer: A
Rationale: COPD is highly associated with chronic cigarette smoking.
6. Troponin elevation is most specific for:
A. Kidney failure
B. Liver disease
C. Myocardial injury
D. Asthma
Correct Answer: C
Rationale: Troponin is a highly specific marker for myocardial damage.
7. Which electrolyte is most important in maintaining resting membrane potential?
A. Potassium
B. Calcium
C. Magnesium
D. Chloride
Correct Answer: A
Rationale: Potassium plays a critical role in membrane polarization.
8. Asthma is characterized by:
A. Permanent airway obstruction
B. Reversible airway inflammation
C. Pulmonary fibrosis
D. Pleural destruction
Correct Answer: B
Rationale: Asthma involves reversible bronchoconstriction and inflammation.
, 9. Which hormone regulates calcium balance?
A. Insulin
B. Parathyroid hormone
C. Cortisol
D. Aldosterone
Correct Answer: B
Rationale: Parathyroid hormone controls calcium levels in blood.
10. Type 1 diabetes mellitus results from:
A. Insulin resistance
B. Autoimmune beta-cell destruction
C. Hyperthyroidism
D. Excess cortisol
Correct Answer: B
Rationale: Type 1 diabetes occurs due to autoimmune destruction of pancreatic beta cells.
11. [Cardiovascular] A patient with chest pain and elevated BNP most likely has:
A. Heart failure
B. Asthma
C. Gastritis
D. Migraine
Correct Answer: A
Rationale: BNP levels commonly rise in heart failure.
12. [Respiratory] Which condition destroys alveolar walls?
A. Bronchitis
B. Emphysema
C. Asthma
D. Pleural effusion
Correct Answer: B
Rationale: Emphysema damages alveolar walls reducing gas exchange.
13. [Endocrine] Cushing syndrome results from excessive:
A. Cortisol
B. Insulin
C. ADH
D. Thyroxine
Correct Answer: A
WGU D236 Practice Exam
65 Exam-Style Questions • Multiple Body Systems • Detailed Rationales • Case-Based
Clinical Scenarios
Instructions:
• Rationales are provided after each section.
• Topics include cardiovascular, respiratory, endocrine, renal, neurologic, immune, and
multisystem disorders.
1. Which process best describes homeostasis?
A. Progressive organ dysfunction
B. Maintenance of internal stability
C. Cellular destruction by toxins
D. Increased sympathetic activity
Correct Answer: B
Rationale: Homeostasis refers to maintaining a stable internal environment.
2. Which mediator primarily increases body temperature during infection?
A. Histamine
B. Cytokines
C. Sodium
D. Albumin
Correct Answer: B
Rationale: Cytokines released during infection stimulate fever production.
3. Which cellular adaptation occurs when skeletal muscle enlarges after exercise?
A. Dysplasia
B. Hyperplasia
C. Hypertrophy
D. Metaplasia
Correct Answer: C
Rationale: Hypertrophy is enlargement of existing cells.
4. Which acid-base imbalance is caused by hyperventilation?
A. Respiratory acidosis
, B. Metabolic acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis
Correct Answer: C
Rationale: Hyperventilation lowers carbon dioxide levels causing respiratory alkalosis.
5. Which condition is strongly associated with cigarette smoking?
A. COPD
B. Appendicitis
C. Migraine
D. Osteoporosis
Correct Answer: A
Rationale: COPD is highly associated with chronic cigarette smoking.
6. Troponin elevation is most specific for:
A. Kidney failure
B. Liver disease
C. Myocardial injury
D. Asthma
Correct Answer: C
Rationale: Troponin is a highly specific marker for myocardial damage.
7. Which electrolyte is most important in maintaining resting membrane potential?
A. Potassium
B. Calcium
C. Magnesium
D. Chloride
Correct Answer: A
Rationale: Potassium plays a critical role in membrane polarization.
8. Asthma is characterized by:
A. Permanent airway obstruction
B. Reversible airway inflammation
C. Pulmonary fibrosis
D. Pleural destruction
Correct Answer: B
Rationale: Asthma involves reversible bronchoconstriction and inflammation.
, 9. Which hormone regulates calcium balance?
A. Insulin
B. Parathyroid hormone
C. Cortisol
D. Aldosterone
Correct Answer: B
Rationale: Parathyroid hormone controls calcium levels in blood.
10. Type 1 diabetes mellitus results from:
A. Insulin resistance
B. Autoimmune beta-cell destruction
C. Hyperthyroidism
D. Excess cortisol
Correct Answer: B
Rationale: Type 1 diabetes occurs due to autoimmune destruction of pancreatic beta cells.
11. [Cardiovascular] A patient with chest pain and elevated BNP most likely has:
A. Heart failure
B. Asthma
C. Gastritis
D. Migraine
Correct Answer: A
Rationale: BNP levels commonly rise in heart failure.
12. [Respiratory] Which condition destroys alveolar walls?
A. Bronchitis
B. Emphysema
C. Asthma
D. Pleural effusion
Correct Answer: B
Rationale: Emphysema damages alveolar walls reducing gas exchange.
13. [Endocrine] Cushing syndrome results from excessive:
A. Cortisol
B. Insulin
C. ADH
D. Thyroxine
Correct Answer: A
