Maryville PATHO NURS 611 Exam (Latest)
Advanced Pathophysiology Comprehensive
Examination - 150 Questions
1. A client is diagnosed with Type 1 diabetes mellitus. Which of the following pathophysiological
mechanisms is responsible for this condition?
A) Insulin resistance at the cellular level
B) Autoimmune destruction of pancreatic beta cells
C) Decreased secretion of glucagon
D) Increased production of cortisol
Answer: B) Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes mellitus results from autoimmune destruction of pancreatic beta cells in the
islets of Langerhans, leading to absolute insulin deficiency. Type 2 diabetes is characterized by insulin
resistance. Glucagon secretion is typically increased in diabetes, not decreased. Cortisol increases blood
glucose but is not the primary cause of Type 1 diabetes.
2. A client presents with severe chest pain radiating to the left arm, diaphoresis, and nausea. An EKG
shows ST-segment elevation in leads V1-V4. Which of the following is the most likely diagnosis?
A) Unstable angina
B) Non-ST elevation myocardial infarction
C) ST-elevation myocardial infarction (STEMI)
D) Pericarditis
Answer: C) ST-elevation myocardial infarction (STEMI)
Rationale: ST-segment elevation in leads V1-V4 indicates an anterior wall STEMI. The classic presentation
includes severe chest pain radiating to the left arm, diaphoresis, and nausea. Unstable angina and
NSTEMI do not show ST elevation. Pericarditis typically shows diffuse ST elevation and PR depression, not
localized to specific leads.
3. A client with chronic obstructive pulmonary disease (COPD) has an arterial blood gas showing pH
7.31, PaCO₂ 55 mm Hg, and HCO₃⁻ 26 mEq/L. Which of the following acid-base imbalances is present?
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Answer: C) Respiratory acidosis
,Rationale: The ABG shows respiratory acidosis: pH < 7.35 (acidosis), PaCO₂ > 45 mm Hg (respiratory
cause), and HCO₃⁻ is normal (26 mEq/L) indicating the kidneys have not yet compensated. In COPD,
hypoventilation leads to CO₂ retention and respiratory acidosis. Metabolic acidosis would have decreased
HCO₃⁻; metabolic alkalosis would have increased pH and HCO₃⁻; respiratory alkalosis would have
decreased PaCO₂.
4. A client with cirrhosis develops ascites. Which of the following pathophysiological mechanisms
contributes to the development of ascites?
A) Increased hepatic production of albumin
B) Portal hypertension and decreased plasma oncotic pressure
C) Increased renal excretion of sodium
D) Decreased production of antidiuretic hormone
Answer: B) Portal hypertension and decreased plasma oncotic pressure
Rationale: Ascites in cirrhosis results from portal hypertension (increased hydrostatic pressure in portal
veins) and decreased plasma oncotic pressure (due to decreased albumin production by the liver). This
leads to fluid shifting from the vascular space into the peritoneal cavity. Albumin production is
decreased, not increased. Sodium retention (not excretion) occurs. ADH levels are often increased.
5. A client with heart failure develops pulmonary edema. Which of the following pathophysiological
mechanisms is primarily responsible?
A) Decreased left ventricular ejection fraction causing increased pulmonary venous pressure
B) Increased right ventricular output
C) Decreased pulmonary capillary permeability
D) Increased lymphatic drainage from the lungs
Answer: A) Decreased left ventricular ejection fraction causing increased pulmonary venous pressure
Rationale: Pulmonary edema in left-sided heart failure occurs when the left ventricle cannot effectively
eject blood, causing increased left ventricular end-diastolic pressure, which is transmitted back to the left
atrium, pulmonary veins, and pulmonary capillaries. This increases hydrostatic pressure, causing fluid to
leak into the alveoli. Right ventricular output is not increased; pulmonary capillary permeability may
increase but is not the primary mechanism; lymphatic drainage is overwhelmed, not increased.
6. A client with a history of sickle cell disease is experiencing a vaso-occlusive crisis. Which of the
following is the underlying pathophysiological mechanism?
A) Decreased production of hemoglobin
B) Sickling of RBCs leading to microvascular occlusion and tissue ischemia
C) Increased production of white blood cells
D) Decreased platelet aggregation
Answer: B) Sickling of RBCs leading to microvascular occlusion and tissue ischemia
,Rationale: In sickle cell disease, hemoglobin S polymerizes under conditions of low oxygen, leading to
sickling of red blood cells. These deformed cells occlude microcirculation, causing tissue ischemia, pain,
and organ damage. Hemoglobin production is abnormal, not decreased (though anemia occurs). WBC
count may be elevated but is not the primary mechanism; platelet aggregation is increased, not
decreased.
7. A client with sepsis develops disseminated intravascular coagulation (DIC). Which of the following
best describes the pathophysiological mechanism of DIC?
A) Increased platelet production leading to thrombosis
B) Activation of coagulation cascade causing widespread microvascular thrombosis and consumption of
clotting factors
C) Decreased production of coagulation factors by the liver
D) Increased production of antithrombin III
Answer: B) Activation of coagulation cascade causing widespread microvascular thrombosis and
consumption of clotting factors
Rationale: DIC is characterized by widespread activation of the coagulation cascade, leading to
microvascular thrombosis and consumption of clotting factors and platelets. This results in both
thrombosis (due to clotting) and bleeding (due to consumption). Platelet production may increase but is
overwhelmed; liver production of clotting factors is normal initially; antithrombin III is decreased, not
increased.
8. A client with chronic kidney disease has anemia. Which of the following is the most likely cause?
A) Decreased production of erythropoietin by the kidneys
B) Increased destruction of red blood cells
C) Decreased iron absorption
D) Increased blood loss
Answer: A) Decreased production of erythropoietin by the kidneys
Rationale: Anemia in chronic kidney disease results primarily from decreased production of
erythropoietin by damaged renal tissue. Erythropoietin stimulates red blood cell production in the bone
marrow. Decreased erythropoietin leads to decreased RBC production. Iron absorption may be affected
but is not the primary cause; increased RBC destruction and blood loss are not the main mechanisms.
9. A client is diagnosed with hyperthyroidism. Which of the following laboratory findings would the
nurse expect?
A) Increased TSH, decreased T₃ and T₄
B) Decreased TSH, increased T₃ and T₄
C) Increased TSH, increased T₃ and T₄
D) Decreased TSH, decreased T₃ and T₄
, Answer: B) Decreased TSH, increased T₃ and T₄
Rationale: In hyperthyroidism (Graves' disease), the thyroid gland produces excessive T₃ and T₄. This
causes negative feedback on the pituitary, reducing TSH secretion. Therefore, TSH is decreased while T₃
and T₄ are increased. Increased TSH with decreased T₃/T₄ suggests hypothyroidism. Increased TSH with
increased T₃/T₄ suggests a pituitary tumor or TSH-secreting tumor. Decreased TSH with decreased T₃/T₄
suggests secondary hypothyroidism.
10. A client with a brain tumor develops increased intracranial pressure (ICP). Which of the following
is the earliest sign of increased ICP?
A) Bradycardia
B) Hypertension
C) Decreased level of consciousness
D) Pupillary dilation
Answer: C) Decreased level of consciousness
Rationale: Change in level of consciousness is the earliest and most sensitive indicator of increased ICP.
As ICP increases, cerebral perfusion decreases, leading to decreased oxygenation and consciousness.
Bradycardia and hypertension are late signs (Cushing's triad). Pupillary dilation occurs later as ICP
compresses the oculomotor nerve.
11. A client with a history of alcohol use disorder develops Wernicke-Korsakoff syndrome. Which of
the following is the underlying deficiency?
A) Vitamin B₁₂
B) Thiamine (Vitamin B₁)
C) Folate
D) Vitamin C
Answer: B) Thiamine (Vitamin B₁)
Rationale: Wernicke-Korsakoff syndrome is caused by thiamine (vitamin B₁) deficiency, often seen in
chronic alcohol use disorder. It presents with Wernicke's encephalopathy (confusion, ataxia,
ophthalmoplegia) and Korsakoff's psychosis (memory loss, confabulation). Vitamin B₁₂ deficiency causes
subacute combined degeneration; folate deficiency causes megaloblastic anemia; vitamin C deficiency
causes scurvy.
12. A client is diagnosed with a urinary tract infection caused by E. coli. Which of the following
virulence factors allows E. coli to adhere to the urinary tract epithelium?
A) Lipopolysaccharide
B) Pili (fimbriae)
C) Exotoxin production
D) Capsule formation
Advanced Pathophysiology Comprehensive
Examination - 150 Questions
1. A client is diagnosed with Type 1 diabetes mellitus. Which of the following pathophysiological
mechanisms is responsible for this condition?
A) Insulin resistance at the cellular level
B) Autoimmune destruction of pancreatic beta cells
C) Decreased secretion of glucagon
D) Increased production of cortisol
Answer: B) Autoimmune destruction of pancreatic beta cells
Rationale: Type 1 diabetes mellitus results from autoimmune destruction of pancreatic beta cells in the
islets of Langerhans, leading to absolute insulin deficiency. Type 2 diabetes is characterized by insulin
resistance. Glucagon secretion is typically increased in diabetes, not decreased. Cortisol increases blood
glucose but is not the primary cause of Type 1 diabetes.
2. A client presents with severe chest pain radiating to the left arm, diaphoresis, and nausea. An EKG
shows ST-segment elevation in leads V1-V4. Which of the following is the most likely diagnosis?
A) Unstable angina
B) Non-ST elevation myocardial infarction
C) ST-elevation myocardial infarction (STEMI)
D) Pericarditis
Answer: C) ST-elevation myocardial infarction (STEMI)
Rationale: ST-segment elevation in leads V1-V4 indicates an anterior wall STEMI. The classic presentation
includes severe chest pain radiating to the left arm, diaphoresis, and nausea. Unstable angina and
NSTEMI do not show ST elevation. Pericarditis typically shows diffuse ST elevation and PR depression, not
localized to specific leads.
3. A client with chronic obstructive pulmonary disease (COPD) has an arterial blood gas showing pH
7.31, PaCO₂ 55 mm Hg, and HCO₃⁻ 26 mEq/L. Which of the following acid-base imbalances is present?
A) Metabolic acidosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Respiratory alkalosis
Answer: C) Respiratory acidosis
,Rationale: The ABG shows respiratory acidosis: pH < 7.35 (acidosis), PaCO₂ > 45 mm Hg (respiratory
cause), and HCO₃⁻ is normal (26 mEq/L) indicating the kidneys have not yet compensated. In COPD,
hypoventilation leads to CO₂ retention and respiratory acidosis. Metabolic acidosis would have decreased
HCO₃⁻; metabolic alkalosis would have increased pH and HCO₃⁻; respiratory alkalosis would have
decreased PaCO₂.
4. A client with cirrhosis develops ascites. Which of the following pathophysiological mechanisms
contributes to the development of ascites?
A) Increased hepatic production of albumin
B) Portal hypertension and decreased plasma oncotic pressure
C) Increased renal excretion of sodium
D) Decreased production of antidiuretic hormone
Answer: B) Portal hypertension and decreased plasma oncotic pressure
Rationale: Ascites in cirrhosis results from portal hypertension (increased hydrostatic pressure in portal
veins) and decreased plasma oncotic pressure (due to decreased albumin production by the liver). This
leads to fluid shifting from the vascular space into the peritoneal cavity. Albumin production is
decreased, not increased. Sodium retention (not excretion) occurs. ADH levels are often increased.
5. A client with heart failure develops pulmonary edema. Which of the following pathophysiological
mechanisms is primarily responsible?
A) Decreased left ventricular ejection fraction causing increased pulmonary venous pressure
B) Increased right ventricular output
C) Decreased pulmonary capillary permeability
D) Increased lymphatic drainage from the lungs
Answer: A) Decreased left ventricular ejection fraction causing increased pulmonary venous pressure
Rationale: Pulmonary edema in left-sided heart failure occurs when the left ventricle cannot effectively
eject blood, causing increased left ventricular end-diastolic pressure, which is transmitted back to the left
atrium, pulmonary veins, and pulmonary capillaries. This increases hydrostatic pressure, causing fluid to
leak into the alveoli. Right ventricular output is not increased; pulmonary capillary permeability may
increase but is not the primary mechanism; lymphatic drainage is overwhelmed, not increased.
6. A client with a history of sickle cell disease is experiencing a vaso-occlusive crisis. Which of the
following is the underlying pathophysiological mechanism?
A) Decreased production of hemoglobin
B) Sickling of RBCs leading to microvascular occlusion and tissue ischemia
C) Increased production of white blood cells
D) Decreased platelet aggregation
Answer: B) Sickling of RBCs leading to microvascular occlusion and tissue ischemia
,Rationale: In sickle cell disease, hemoglobin S polymerizes under conditions of low oxygen, leading to
sickling of red blood cells. These deformed cells occlude microcirculation, causing tissue ischemia, pain,
and organ damage. Hemoglobin production is abnormal, not decreased (though anemia occurs). WBC
count may be elevated but is not the primary mechanism; platelet aggregation is increased, not
decreased.
7. A client with sepsis develops disseminated intravascular coagulation (DIC). Which of the following
best describes the pathophysiological mechanism of DIC?
A) Increased platelet production leading to thrombosis
B) Activation of coagulation cascade causing widespread microvascular thrombosis and consumption of
clotting factors
C) Decreased production of coagulation factors by the liver
D) Increased production of antithrombin III
Answer: B) Activation of coagulation cascade causing widespread microvascular thrombosis and
consumption of clotting factors
Rationale: DIC is characterized by widespread activation of the coagulation cascade, leading to
microvascular thrombosis and consumption of clotting factors and platelets. This results in both
thrombosis (due to clotting) and bleeding (due to consumption). Platelet production may increase but is
overwhelmed; liver production of clotting factors is normal initially; antithrombin III is decreased, not
increased.
8. A client with chronic kidney disease has anemia. Which of the following is the most likely cause?
A) Decreased production of erythropoietin by the kidneys
B) Increased destruction of red blood cells
C) Decreased iron absorption
D) Increased blood loss
Answer: A) Decreased production of erythropoietin by the kidneys
Rationale: Anemia in chronic kidney disease results primarily from decreased production of
erythropoietin by damaged renal tissue. Erythropoietin stimulates red blood cell production in the bone
marrow. Decreased erythropoietin leads to decreased RBC production. Iron absorption may be affected
but is not the primary cause; increased RBC destruction and blood loss are not the main mechanisms.
9. A client is diagnosed with hyperthyroidism. Which of the following laboratory findings would the
nurse expect?
A) Increased TSH, decreased T₃ and T₄
B) Decreased TSH, increased T₃ and T₄
C) Increased TSH, increased T₃ and T₄
D) Decreased TSH, decreased T₃ and T₄
, Answer: B) Decreased TSH, increased T₃ and T₄
Rationale: In hyperthyroidism (Graves' disease), the thyroid gland produces excessive T₃ and T₄. This
causes negative feedback on the pituitary, reducing TSH secretion. Therefore, TSH is decreased while T₃
and T₄ are increased. Increased TSH with decreased T₃/T₄ suggests hypothyroidism. Increased TSH with
increased T₃/T₄ suggests a pituitary tumor or TSH-secreting tumor. Decreased TSH with decreased T₃/T₄
suggests secondary hypothyroidism.
10. A client with a brain tumor develops increased intracranial pressure (ICP). Which of the following
is the earliest sign of increased ICP?
A) Bradycardia
B) Hypertension
C) Decreased level of consciousness
D) Pupillary dilation
Answer: C) Decreased level of consciousness
Rationale: Change in level of consciousness is the earliest and most sensitive indicator of increased ICP.
As ICP increases, cerebral perfusion decreases, leading to decreased oxygenation and consciousness.
Bradycardia and hypertension are late signs (Cushing's triad). Pupillary dilation occurs later as ICP
compresses the oculomotor nerve.
11. A client with a history of alcohol use disorder develops Wernicke-Korsakoff syndrome. Which of
the following is the underlying deficiency?
A) Vitamin B₁₂
B) Thiamine (Vitamin B₁)
C) Folate
D) Vitamin C
Answer: B) Thiamine (Vitamin B₁)
Rationale: Wernicke-Korsakoff syndrome is caused by thiamine (vitamin B₁) deficiency, often seen in
chronic alcohol use disorder. It presents with Wernicke's encephalopathy (confusion, ataxia,
ophthalmoplegia) and Korsakoff's psychosis (memory loss, confabulation). Vitamin B₁₂ deficiency causes
subacute combined degeneration; folate deficiency causes megaloblastic anemia; vitamin C deficiency
causes scurvy.
12. A client is diagnosed with a urinary tract infection caused by E. coli. Which of the following
virulence factors allows E. coli to adhere to the urinary tract epithelium?
A) Lipopolysaccharide
B) Pili (fimbriae)
C) Exotoxin production
D) Capsule formation
