1
2026 NUR 2063 Comprehensive Pathophysiology Practice
Exam | 200+ Practice Questions and Rationales
1. A 65-year-old man with a history of chronic hypertension develops sudden,
severe chest pain that radiates to his back. A CT scan reveals a tear in the
intimal layer of the aortic wall. Which of the following is the most accurate term
for this condition?
A. Aortic aneurysm
B. Aortic dissection
C. Atherosclerosis
D. Arteriosclerosis
Answer: B
Rationale: Aortic dissection occurs when blood enters the media layer of the aorta
through a tear in the intima, creating a false lumen. It presents with severe,
tearing pain and can lead to aortic rupture. An aortic aneurysm is a localized
dilation, not a tear. Atherosclerosis is plaque buildup; arteriosclerosis is hardening
of the arteries.
2. The renin-angiotensin-aldosterone system (RAAS) is activated in a patient
with acute blood loss. Which of the following describes the direct effect of
angiotensin II on blood vessels?
A. Vasodilation
B. Vasoconstriction
C. Increased vascular permeability
D. Decreased peripheral resistance
Answer: B
Rationale: Angiotensin II is a potent vasoconstrictor that raises blood pressure by
increasing systemic vascular resistance. It also stimulates aldosterone release,
leading to sodium and water retention. Vasodilation is caused by substances like
nitric oxide. Increased permeability is seen in inflammation.
3. A patient with liver cirrhosis develops ascites. Which of the following
mechanisms contributes most directly to fluid accumulation in the peritoneal
cavity?
pg. 1
,2
A. Decreased plasma oncotic pressure
B. Increased capillary permeability
C. Lymphatic obstruction
D. Increased hydrostatic pressure in the portal vein
Answer: A
*Rationale: Cirrhosis impairs the liver’s ability to synthesize albumin, leading to
hypoalbuminemia and decreased plasma oncotic pressure. This allows fluid to
leak from the capillaries into the interstitial space (ascites). Portal hypertension
also contributes, but the decreased oncotic pressure is the primary mechanism
for fluid accumulation. Increased hydrostatic pressure (portal hypertension) also
pushes fluid out, but the question asks "most directly" for the fluid
accumulation—both mechanisms work together. However, the classic explanation
is that decreased oncotic pressure allows fluid to remain in the interstitial space.
Many sources cite portal hypertension as the primary force driving ascites
formation, but the hypoalbuminemia is a key contributor. In pathophysiology
exams, both are important; however, the question specifically points to fluid
accumulation due to decreased oncotic pressure, which is a direct result of
hypoalbuminemia. I'll choose A, but note that portal hypertension is the main
driver. I'll refine: In cirrhosis, portal hypertension increases hydrostatic pressure,
which is the initiating force, but the low oncotic pressure permits persistent
ascites. I'll keep A as the answer, but I'll phrase the rationale to acknowledge
both. Actually, the question says "contributes most directly"—decreased plasma
oncotic pressure is a major factor. I'll stick with A.
*Rationale: In cirrhosis, portal hypertension increases hydrostatic pressure in the
splanchnic capillaries, driving fluid into the peritoneal cavity. The concurrent
hypoalbuminemia reduces plasma oncotic pressure, which normally pulls fluid
back into the vessels, thus potentiating the ascites. Both mechanisms are
important, but the initiating factor is portal hypertension. However, the question
specifically asks "Which mechanism contributes most directly to fluid
accumulation?" – the answer is typically "increased hydrostatic pressure." I'll
change the answer to D to align with standard pathophysiology: the primary
factor is portal hypertension. Let's correct.
pg. 2
,3
Revised Answer: D
Rationale: Portal hypertension (increased hydrostatic pressure) is the primary
driving force for ascites formation in cirrhosis. Hypoalbuminemia (decreased
oncotic pressure) contributes but is a secondary factor. Lymphatic obstruction can
also occur but is not the main mechanism. Capillary permeability changes are not
typical in cirrhosis.
4. A patient with a history of alcoholism presents with confusion, ataxia, and
nystagmus. The nurse suspects Wernicke encephalopathy. A deficiency of which
vitamin is the cause?
A. Vitamin B12
B. Thiamine (Vitamin B1)
C. Pyridoxine (Vitamin B6)
D. Folic acid
Answer: B
Rationale: Wernicke encephalopathy is caused by thiamine (B1) deficiency, often
in alcoholics. It is characterized by the triad of confusion, ataxia, and oculomotor
abnormalities. Thiamine must be given before glucose to prevent worsening. B12
deficiency causes megaloblastic anemia and neurological symptoms like
paresthesia.
5. A patient with chronic kidney disease has a serum phosphate of 6.5 mg/dL
and a calcium of 8.5 mg/dL. Which hormone is most likely elevated in response
to this condition?
A. Calcitonin
B. Parathyroid hormone (PTH)
C. Thyroxine
D. Aldosterone
Answer: B
Rationale: In renal failure, the kidneys cannot excrete phosphate, leading to
hyperphosphatemia. The resulting low calcium stimulates the parathyroid glands
to secrete PTH, a condition known as secondary hyperparathyroidism. Calcitonin
would lower calcium. Thyroxine and aldosterone are not directly involved.
6. A 55-year-old woman with breast cancer develops bone metastases. Which of
the following best explains the pain she experiences?
pg. 3
, 4
A. Ischemia of bone tissue
B. Nerve compression by the tumor
C. Release of prostaglandins and cytokines by tumor cells stimulating pain
receptors in the periosteum
D. Muscle spasms
Answer: C
Rationale: Bone metastases cause pain by releasing chemical mediators
(prostaglandins, cytokines) that stimulate nociceptors in the richly innervated
periosteum. The tumor also causes bone destruction. Ischemia and nerve
compression may play a role but are less common. Muscle spasms are not the
primary cause.
7. A patient with type 2 diabetes mellitus has an A1c of 8.5%. Which of the
following best describes the primary pathophysiologic mechanism of insulin
resistance in peripheral tissues?
A. Destruction of pancreatic beta cells
B. Downregulation of insulin receptors
C. Excessive insulin secretion
D. Increased glucagon production
Answer: B
Rationale: In type 2 diabetes, target tissues (muscle, liver, adipose) become
resistant to insulin due to downregulation of insulin receptors and post-receptor
defects. Beta-cell destruction is the hallmark of type 1 diabetes. Insulin secretion is
often high early in type 2, but the tissues do not respond. Glucagon may be
elevated but is not the primary mechanism.
8. A patient with a large anterior myocardial infarction develops hypotension,
tachycardia, and jugular vein distention. Heart sounds are muffled. Which
complication is most likely?
A. Cardiac tamponade
B. Acute mitral regurgitation
C. Ventricular septal defect
D. Right ventricular infarction
Answer: A
Rationale: Beck’s triad (hypotension, muffled heart sounds, JVD) is classic for
pg. 4
2026 NUR 2063 Comprehensive Pathophysiology Practice
Exam | 200+ Practice Questions and Rationales
1. A 65-year-old man with a history of chronic hypertension develops sudden,
severe chest pain that radiates to his back. A CT scan reveals a tear in the
intimal layer of the aortic wall. Which of the following is the most accurate term
for this condition?
A. Aortic aneurysm
B. Aortic dissection
C. Atherosclerosis
D. Arteriosclerosis
Answer: B
Rationale: Aortic dissection occurs when blood enters the media layer of the aorta
through a tear in the intima, creating a false lumen. It presents with severe,
tearing pain and can lead to aortic rupture. An aortic aneurysm is a localized
dilation, not a tear. Atherosclerosis is plaque buildup; arteriosclerosis is hardening
of the arteries.
2. The renin-angiotensin-aldosterone system (RAAS) is activated in a patient
with acute blood loss. Which of the following describes the direct effect of
angiotensin II on blood vessels?
A. Vasodilation
B. Vasoconstriction
C. Increased vascular permeability
D. Decreased peripheral resistance
Answer: B
Rationale: Angiotensin II is a potent vasoconstrictor that raises blood pressure by
increasing systemic vascular resistance. It also stimulates aldosterone release,
leading to sodium and water retention. Vasodilation is caused by substances like
nitric oxide. Increased permeability is seen in inflammation.
3. A patient with liver cirrhosis develops ascites. Which of the following
mechanisms contributes most directly to fluid accumulation in the peritoneal
cavity?
pg. 1
,2
A. Decreased plasma oncotic pressure
B. Increased capillary permeability
C. Lymphatic obstruction
D. Increased hydrostatic pressure in the portal vein
Answer: A
*Rationale: Cirrhosis impairs the liver’s ability to synthesize albumin, leading to
hypoalbuminemia and decreased plasma oncotic pressure. This allows fluid to
leak from the capillaries into the interstitial space (ascites). Portal hypertension
also contributes, but the decreased oncotic pressure is the primary mechanism
for fluid accumulation. Increased hydrostatic pressure (portal hypertension) also
pushes fluid out, but the question asks "most directly" for the fluid
accumulation—both mechanisms work together. However, the classic explanation
is that decreased oncotic pressure allows fluid to remain in the interstitial space.
Many sources cite portal hypertension as the primary force driving ascites
formation, but the hypoalbuminemia is a key contributor. In pathophysiology
exams, both are important; however, the question specifically points to fluid
accumulation due to decreased oncotic pressure, which is a direct result of
hypoalbuminemia. I'll choose A, but note that portal hypertension is the main
driver. I'll refine: In cirrhosis, portal hypertension increases hydrostatic pressure,
which is the initiating force, but the low oncotic pressure permits persistent
ascites. I'll keep A as the answer, but I'll phrase the rationale to acknowledge
both. Actually, the question says "contributes most directly"—decreased plasma
oncotic pressure is a major factor. I'll stick with A.
*Rationale: In cirrhosis, portal hypertension increases hydrostatic pressure in the
splanchnic capillaries, driving fluid into the peritoneal cavity. The concurrent
hypoalbuminemia reduces plasma oncotic pressure, which normally pulls fluid
back into the vessels, thus potentiating the ascites. Both mechanisms are
important, but the initiating factor is portal hypertension. However, the question
specifically asks "Which mechanism contributes most directly to fluid
accumulation?" – the answer is typically "increased hydrostatic pressure." I'll
change the answer to D to align with standard pathophysiology: the primary
factor is portal hypertension. Let's correct.
pg. 2
,3
Revised Answer: D
Rationale: Portal hypertension (increased hydrostatic pressure) is the primary
driving force for ascites formation in cirrhosis. Hypoalbuminemia (decreased
oncotic pressure) contributes but is a secondary factor. Lymphatic obstruction can
also occur but is not the main mechanism. Capillary permeability changes are not
typical in cirrhosis.
4. A patient with a history of alcoholism presents with confusion, ataxia, and
nystagmus. The nurse suspects Wernicke encephalopathy. A deficiency of which
vitamin is the cause?
A. Vitamin B12
B. Thiamine (Vitamin B1)
C. Pyridoxine (Vitamin B6)
D. Folic acid
Answer: B
Rationale: Wernicke encephalopathy is caused by thiamine (B1) deficiency, often
in alcoholics. It is characterized by the triad of confusion, ataxia, and oculomotor
abnormalities. Thiamine must be given before glucose to prevent worsening. B12
deficiency causes megaloblastic anemia and neurological symptoms like
paresthesia.
5. A patient with chronic kidney disease has a serum phosphate of 6.5 mg/dL
and a calcium of 8.5 mg/dL. Which hormone is most likely elevated in response
to this condition?
A. Calcitonin
B. Parathyroid hormone (PTH)
C. Thyroxine
D. Aldosterone
Answer: B
Rationale: In renal failure, the kidneys cannot excrete phosphate, leading to
hyperphosphatemia. The resulting low calcium stimulates the parathyroid glands
to secrete PTH, a condition known as secondary hyperparathyroidism. Calcitonin
would lower calcium. Thyroxine and aldosterone are not directly involved.
6. A 55-year-old woman with breast cancer develops bone metastases. Which of
the following best explains the pain she experiences?
pg. 3
, 4
A. Ischemia of bone tissue
B. Nerve compression by the tumor
C. Release of prostaglandins and cytokines by tumor cells stimulating pain
receptors in the periosteum
D. Muscle spasms
Answer: C
Rationale: Bone metastases cause pain by releasing chemical mediators
(prostaglandins, cytokines) that stimulate nociceptors in the richly innervated
periosteum. The tumor also causes bone destruction. Ischemia and nerve
compression may play a role but are less common. Muscle spasms are not the
primary cause.
7. A patient with type 2 diabetes mellitus has an A1c of 8.5%. Which of the
following best describes the primary pathophysiologic mechanism of insulin
resistance in peripheral tissues?
A. Destruction of pancreatic beta cells
B. Downregulation of insulin receptors
C. Excessive insulin secretion
D. Increased glucagon production
Answer: B
Rationale: In type 2 diabetes, target tissues (muscle, liver, adipose) become
resistant to insulin due to downregulation of insulin receptors and post-receptor
defects. Beta-cell destruction is the hallmark of type 1 diabetes. Insulin secretion is
often high early in type 2, but the tissues do not respond. Glucagon may be
elevated but is not the primary mechanism.
8. A patient with a large anterior myocardial infarction develops hypotension,
tachycardia, and jugular vein distention. Heart sounds are muffled. Which
complication is most likely?
A. Cardiac tamponade
B. Acute mitral regurgitation
C. Ventricular septal defect
D. Right ventricular infarction
Answer: A
Rationale: Beck’s triad (hypotension, muffled heart sounds, JVD) is classic for
pg. 4
