Pathophysiology Test Bank NEWEST 2026
ACTUAL EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||BRAND NEW!!
1. Which mechanism is responsible for edema
formation in heart failure?
A. Decreased capillary permeability
B. Increased plasma oncotic pressure
C. Increased hydrostatic pressure
D. Decreased sodium retention
Answer: C
In heart failure, poor cardiac output causes blood to
back up, increasing hydrostatic pressure and pushing
fluid into interstitial spaces.
2. What is the primary cause of hypoxemia in chronic
obstructive pulmonary disease (COPD)?
A. Reduced hemoglobin
B. Ventilation-perfusion mismatch
C. Increased alveolar ventilation
D. Increased diffusion capacity
,Answer: B
COPD leads to uneven airflow and blood flow, causing
areas where oxygen exchange is inefficient.
3. Which hormone primarily regulates sodium
reabsorption in the kidneys?
A. Antidiuretic hormone
B. Atrial natriuretic peptide
C. Aldosterone
D. Renin
Answer: C
Aldosterone increases sodium reabsorption in the
distal nephron, which also promotes water retention.
4. An autoimmune disorder is best described as a
condition in which:
A. The immune system is underactive
B. The immune system attacks self-antigens
C. The body fails to produce antibodies
D. Pathogens evade immune detection
Answer: B
Autoimmune diseases result from loss of self-
tolerance, leading to immune-mediated tissue
damage.
, 5. Which acid-base imbalance is caused by prolonged
vomiting?
A. Metabolic acidosis
B. Respiratory acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis
Answer: D
Vomiting causes loss of gastric acid, increasing blood
pH and leading to metabolic alkalosis.
6. What is the hallmark pathophysiologic feature of
asthma?
A. Alveolar destruction
B. Pulmonary fibrosis
C. Reversible airway obstruction
D. Decreased surfactant production
Answer: C
Asthma involves bronchoconstriction, inflammation,
and mucus production that are typically reversible.
7. Which cell type is primarily responsible for
antibody production?
A. T lymphocytes
B. Macrophages
, C. B lymphocytes
D. Neutrophils
Answer: C
B cells differentiate into plasma cells, which secrete
antibodies.
8. What is the most common cause of myocardial
infarction?
A. Coronary artery spasm
B. Atherosclerotic plaque rupture
C. Viral infection
D. Congenital heart disease
Answer: B
Plaque rupture triggers thrombosis, acutely blocking
coronary blood flow.
9. Which electrolyte imbalance is most likely to cause
cardiac dysrhythmias?
A. Hypernatremia
B. Hypocalcemia
C. Hyperkalemia
D. Hypermagnesemia
Answer: C
Potassium directly affects cardiac electrical activity;
elevated levels can be life-threatening.
ACTUAL EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||BRAND NEW!!
1. Which mechanism is responsible for edema
formation in heart failure?
A. Decreased capillary permeability
B. Increased plasma oncotic pressure
C. Increased hydrostatic pressure
D. Decreased sodium retention
Answer: C
In heart failure, poor cardiac output causes blood to
back up, increasing hydrostatic pressure and pushing
fluid into interstitial spaces.
2. What is the primary cause of hypoxemia in chronic
obstructive pulmonary disease (COPD)?
A. Reduced hemoglobin
B. Ventilation-perfusion mismatch
C. Increased alveolar ventilation
D. Increased diffusion capacity
,Answer: B
COPD leads to uneven airflow and blood flow, causing
areas where oxygen exchange is inefficient.
3. Which hormone primarily regulates sodium
reabsorption in the kidneys?
A. Antidiuretic hormone
B. Atrial natriuretic peptide
C. Aldosterone
D. Renin
Answer: C
Aldosterone increases sodium reabsorption in the
distal nephron, which also promotes water retention.
4. An autoimmune disorder is best described as a
condition in which:
A. The immune system is underactive
B. The immune system attacks self-antigens
C. The body fails to produce antibodies
D. Pathogens evade immune detection
Answer: B
Autoimmune diseases result from loss of self-
tolerance, leading to immune-mediated tissue
damage.
, 5. Which acid-base imbalance is caused by prolonged
vomiting?
A. Metabolic acidosis
B. Respiratory acidosis
C. Respiratory alkalosis
D. Metabolic alkalosis
Answer: D
Vomiting causes loss of gastric acid, increasing blood
pH and leading to metabolic alkalosis.
6. What is the hallmark pathophysiologic feature of
asthma?
A. Alveolar destruction
B. Pulmonary fibrosis
C. Reversible airway obstruction
D. Decreased surfactant production
Answer: C
Asthma involves bronchoconstriction, inflammation,
and mucus production that are typically reversible.
7. Which cell type is primarily responsible for
antibody production?
A. T lymphocytes
B. Macrophages
, C. B lymphocytes
D. Neutrophils
Answer: C
B cells differentiate into plasma cells, which secrete
antibodies.
8. What is the most common cause of myocardial
infarction?
A. Coronary artery spasm
B. Atherosclerotic plaque rupture
C. Viral infection
D. Congenital heart disease
Answer: B
Plaque rupture triggers thrombosis, acutely blocking
coronary blood flow.
9. Which electrolyte imbalance is most likely to cause
cardiac dysrhythmias?
A. Hypernatremia
B. Hypocalcemia
C. Hyperkalemia
D. Hypermagnesemia
Answer: C
Potassium directly affects cardiac electrical activity;
elevated levels can be life-threatening.
