Fall Semester 2026–2027 RASMUSSEN NUR2063 Essentials of
Pathophysiology Updated 2026 | 190+ Questions and Answers |
Rasmussen University NUR2063 Exam Prep Study Guide, Practice Exam,
Comprehensive Review, Test Bank, Cellular Injury and Adaptation,
Inflammation and Immunity, Fluid and Electrolyte Imbalances,
Cardiovascular Disorders, Respiratory Diseases, Endocrine Dysfunction,
Renal Conditions, Neurological Disorders, Detailed Rationales and
Complete Revision Material
Question 1: A 65-year-old male with a history of atherosclerosis presents with
sudden, severe chest pain that radiates to his back. A CT angiogram reveals an
intimal tear in the descending thoracic aorta. Which of the following
pathophysiological processes is the primary cause of this patient's condition?
A. Aneurysmal dilation and rupture of the aortic wall due to chronic hypertension.
B. An inflammatory cascade leading to necrotizing vasculitis of the aortic vasa vasorum.
C. A disruption in the tunica media, allowing blood to track between the intimal and
medial layers.
D. An infectious process causing a mycotic aneurysm and subsequent rupture.
CORRECT ANSWER: C. A disruption in the tunica media, allowing blood to track
between the intimal and medial layers.
Rationale:The patient's presentation and CT findings are classic for an aortic
dissection. The primary pathophysiological event is a tear in the intimal lining, which
allows high-pressure blood to enter the tunica media and create a false lumen that
propagates along the aortic wall. The blood tracks between the intimal and medial
layers, dissecting them. Atherosclerosis is a major risk factor.
Question 2: A patient with chronic obstructive pulmonary disease (COPD) has a
blood gas analysis showing a PaCO2 of 58 mmHg and a pH of 7.31. Which of the
following physiological responses is most directly responsible for the chronic
hypoxemia commonly seen in this patient?
A. Increased oxygen diffusion capacity across the alveolar-capillary membrane.
B. A shift of the oxyhemoglobin dissociation curve to the left.
C. Ventilation-perfusion (V/Q) mismatch due to airway obstruction and destruction of
alveolar walls.
D. Increased cardiac output leading to decreased transit time in pulmonary capillaries.
CORRECT ANSWER: C. Ventilation-perfusion (V/Q) mismatch due to airway
obstruction and destruction of alveolar walls.
Rationale:COPD is characterized by airway obstruction (e.g., in chronic bronchitis) and
alveolar destruction (e.g., in emphysema). This leads to areas of the lung that are poorly
,ventilated but still perfused, creating a V/Q mismatch. This is the primary mechanism of
hypoxemia in COPD. The elevated PaCO2 and low pH indicate respiratory acidosis.
Question 3: A 32-year-old woman presents with fatigue, shortness of breath, and
pallor. Her lab results show a hemoglobin of 8.2 g/dL, a mean corpuscular volume
(MCV) of 72 fL, and a low serum ferritin. What is the most likely underlying
pathophysiological defect in this patient's erythrocyte production?
A. Impaired heme synthesis due to a deficiency in vitamin B12.
B. A defect in the globin chains of the hemoglobin molecule.
C. A deficiency in intrinsic factor leading to impaired DNA synthesis.
D. Insufficient iron availability for hemoglobin synthesis, leading to small, pale red
blood cells.
CORRECT ANSWER: D. Insufficient iron availability for hemoglobin synthesis,
leading to small, pale red blood cells.
Rationale:The patient's low hemoglobin, low MCV (microcytic), and low ferritin are
classic findings of iron deficiency anemia. Ferritin reflects the body's iron stores. The
pathophysiological defect is a lack of iron, which is essential for heme synthesis.
Without adequate iron, the developing erythrocytes produce less hemoglobin, resulting
in smaller (microcytic) and paler (hypochromic) cells.
Question 4: During an asthma exacerbation, a patient experiences significant
bronchoconstriction. Which of the following pathophysiological mechanisms is the
primary cause of this airway narrowing?
A. Degranulation of mast cells releasing histamine and leukotrienes that cause smooth
muscle contraction.
B. A genetic deficiency in alpha-1 antitrypsin leading to elastase destruction of alveolar
walls.
C. Hypertrophy and hyperplasia of goblet cells leading to excessive mucus production.
D. An autoimmune reaction targeting the beta-2 adrenergic receptors on bronchial
smooth muscle.
CORRECT ANSWER: A. Degranulation of mast cells releasing histamine and
leukotrienes that cause smooth muscle contraction.
Rationale:Asthma is a chronic inflammatory airway disease. During an exacerbation,
an allergen triggers the cross-linking of IgE antibodies on mast cells, causing them to
degranulate. They release potent bronchoconstrictors like histamine and leukotrienes.
These substances cause the bronchial smooth muscle to contract, leading to airflow
obstruction.
,Question 5: A patient with severe atherosclerosis is at risk for a myocardial
infarction. The most critical pathophysiological event that leads to an acute MI is:
A. Gradual narrowing of the coronary artery lumen to less than 50% of its original
diameter.
B. Rupture of an atherosclerotic plaque, leading to platelet aggregation and thrombus
formation.
C. A sudden vasospasm of a healthy coronary artery due to increased sympathetic tone.
D. An embolus originating from a deep vein thrombosis that lodges in the coronary
circulation.
CORRECT ANSWER: B. Rupture of an atherosclerotic plaque, leading to platelet
aggregation and thrombus formation.
Rationale:The most common cause of an acute myocardial infarction is the rupture or
erosion of an unstable atherosclerotic plaque. This exposes the highly thrombogenic
subendothelial matrix to the blood. This triggers platelet adhesion, aggregation, and the
activation of the coagulation cascade, forming a platelet-rich thrombus. This thrombus
occludes the artery, causing ischemia and infarction. Gradual narrowing usually causes
chronic angina, not an acute MI.
Question 6: A patient with heart failure develops peripheral edema. This is primarily
due to which of the following pathophysiological mechanisms?
A. Decreased capillary hydrostatic pressure due to reduced cardiac output.
B. Increased capillary permeability due to systemic inflammation.
C. Increased capillary hydrostatic pressure secondary to venous congestion.
D. Decreased plasma oncotic pressure due to liver dysfunction.
CORRECT ANSWER: C. Increased capillary hydrostatic pressure secondary to
venous congestion.
Rationale:In heart failure, especially right-sided failure, the heart is unable to pump
blood effectively. This leads to a backup of blood in the venous system, increasing the
venous pressure. This increased pressure is transmitted to the capillaries, raising the
capillary hydrostatic pressure. This high pressure forces fluid out of the capillaries and
into the interstitial space, causing peripheral edema.
Question 7: In a patient with type 1 diabetes mellitus, the primary
pathophysiological defect is:
A. Resistance of target cells to the effects of insulin.
B. An autoimmune destruction of the pancreatic beta cells, resulting in an absolute
insulin deficiency.
, C. A defect in the insulin receptor signaling pathway on liver and muscle cells.
D. Excessive production of insulin by the pancreatic alpha cells.
CORRECT ANSWER: B. An autoimmune destruction of the pancreatic beta cells,
resulting in an absolute insulin deficiency.
Rationale:Type 1 diabetes is an autoimmune disease. The body's immune system
attacks and destroys the beta cells located in the islets of Langerhans within the
pancreas. These beta cells are responsible for producing insulin. The destruction leads
to an absolute deficiency of insulin, making the patient dependent on exogenous insulin
for survival.
Question 8: A patient with liver cirrhosis is at risk for bleeding complications. This
is most directly related to which of the following pathophysiological consequences
of liver failure?
A. Decreased production of clotting factors by the hepatocytes.
B. Increased production of anti-clotting factors, such as protein C.
C. Impaired absorption of vitamin B12 due to gastric atrophy.
D. Hypersplenism leading to an increase in platelet production.
CORRECT ANSWER: A. Decreased production of clotting factors by the
hepatocytes.
Rationale:The liver is responsible for synthesizing most of the coagulation factors (with
the exception of factor VIII). In cirrhosis, the functional mass of the liver is greatly
reduced, and hepatocytes are replaced by fibrous scar tissue. This significantly impairs
the liver's ability to produce clotting factors (like prothrombin), leading to a
coagulopathy and an increased risk of bleeding.
Question 9: A patient with chronic kidney disease (CKD) is found to be anemic. This
anemia is primarily caused by:
A. A deficiency in dietary iron due to poor appetite.
B. Chronic blood loss from the gastrointestinal tract.
C. Decreased production of erythropoietin by the failing kidneys.
D. A vitamin B12 deficiency due to impaired absorption.
CORRECT ANSWER: C. Decreased production of erythropoietin by the failing
kidneys.
Rationale:The kidneys produce the hormone erythropoietin (EPO), which stimulates
the bone marrow to produce red blood cells. In CKD, the renal parenchyma is damaged
and cannot produce adequate amounts of EPO. This leads to a normocytic,
normochromic anemia, often referred to as the anemia of chronic disease or renal
anemia.
Pathophysiology Updated 2026 | 190+ Questions and Answers |
Rasmussen University NUR2063 Exam Prep Study Guide, Practice Exam,
Comprehensive Review, Test Bank, Cellular Injury and Adaptation,
Inflammation and Immunity, Fluid and Electrolyte Imbalances,
Cardiovascular Disorders, Respiratory Diseases, Endocrine Dysfunction,
Renal Conditions, Neurological Disorders, Detailed Rationales and
Complete Revision Material
Question 1: A 65-year-old male with a history of atherosclerosis presents with
sudden, severe chest pain that radiates to his back. A CT angiogram reveals an
intimal tear in the descending thoracic aorta. Which of the following
pathophysiological processes is the primary cause of this patient's condition?
A. Aneurysmal dilation and rupture of the aortic wall due to chronic hypertension.
B. An inflammatory cascade leading to necrotizing vasculitis of the aortic vasa vasorum.
C. A disruption in the tunica media, allowing blood to track between the intimal and
medial layers.
D. An infectious process causing a mycotic aneurysm and subsequent rupture.
CORRECT ANSWER: C. A disruption in the tunica media, allowing blood to track
between the intimal and medial layers.
Rationale:The patient's presentation and CT findings are classic for an aortic
dissection. The primary pathophysiological event is a tear in the intimal lining, which
allows high-pressure blood to enter the tunica media and create a false lumen that
propagates along the aortic wall. The blood tracks between the intimal and medial
layers, dissecting them. Atherosclerosis is a major risk factor.
Question 2: A patient with chronic obstructive pulmonary disease (COPD) has a
blood gas analysis showing a PaCO2 of 58 mmHg and a pH of 7.31. Which of the
following physiological responses is most directly responsible for the chronic
hypoxemia commonly seen in this patient?
A. Increased oxygen diffusion capacity across the alveolar-capillary membrane.
B. A shift of the oxyhemoglobin dissociation curve to the left.
C. Ventilation-perfusion (V/Q) mismatch due to airway obstruction and destruction of
alveolar walls.
D. Increased cardiac output leading to decreased transit time in pulmonary capillaries.
CORRECT ANSWER: C. Ventilation-perfusion (V/Q) mismatch due to airway
obstruction and destruction of alveolar walls.
Rationale:COPD is characterized by airway obstruction (e.g., in chronic bronchitis) and
alveolar destruction (e.g., in emphysema). This leads to areas of the lung that are poorly
,ventilated but still perfused, creating a V/Q mismatch. This is the primary mechanism of
hypoxemia in COPD. The elevated PaCO2 and low pH indicate respiratory acidosis.
Question 3: A 32-year-old woman presents with fatigue, shortness of breath, and
pallor. Her lab results show a hemoglobin of 8.2 g/dL, a mean corpuscular volume
(MCV) of 72 fL, and a low serum ferritin. What is the most likely underlying
pathophysiological defect in this patient's erythrocyte production?
A. Impaired heme synthesis due to a deficiency in vitamin B12.
B. A defect in the globin chains of the hemoglobin molecule.
C. A deficiency in intrinsic factor leading to impaired DNA synthesis.
D. Insufficient iron availability for hemoglobin synthesis, leading to small, pale red
blood cells.
CORRECT ANSWER: D. Insufficient iron availability for hemoglobin synthesis,
leading to small, pale red blood cells.
Rationale:The patient's low hemoglobin, low MCV (microcytic), and low ferritin are
classic findings of iron deficiency anemia. Ferritin reflects the body's iron stores. The
pathophysiological defect is a lack of iron, which is essential for heme synthesis.
Without adequate iron, the developing erythrocytes produce less hemoglobin, resulting
in smaller (microcytic) and paler (hypochromic) cells.
Question 4: During an asthma exacerbation, a patient experiences significant
bronchoconstriction. Which of the following pathophysiological mechanisms is the
primary cause of this airway narrowing?
A. Degranulation of mast cells releasing histamine and leukotrienes that cause smooth
muscle contraction.
B. A genetic deficiency in alpha-1 antitrypsin leading to elastase destruction of alveolar
walls.
C. Hypertrophy and hyperplasia of goblet cells leading to excessive mucus production.
D. An autoimmune reaction targeting the beta-2 adrenergic receptors on bronchial
smooth muscle.
CORRECT ANSWER: A. Degranulation of mast cells releasing histamine and
leukotrienes that cause smooth muscle contraction.
Rationale:Asthma is a chronic inflammatory airway disease. During an exacerbation,
an allergen triggers the cross-linking of IgE antibodies on mast cells, causing them to
degranulate. They release potent bronchoconstrictors like histamine and leukotrienes.
These substances cause the bronchial smooth muscle to contract, leading to airflow
obstruction.
,Question 5: A patient with severe atherosclerosis is at risk for a myocardial
infarction. The most critical pathophysiological event that leads to an acute MI is:
A. Gradual narrowing of the coronary artery lumen to less than 50% of its original
diameter.
B. Rupture of an atherosclerotic plaque, leading to platelet aggregation and thrombus
formation.
C. A sudden vasospasm of a healthy coronary artery due to increased sympathetic tone.
D. An embolus originating from a deep vein thrombosis that lodges in the coronary
circulation.
CORRECT ANSWER: B. Rupture of an atherosclerotic plaque, leading to platelet
aggregation and thrombus formation.
Rationale:The most common cause of an acute myocardial infarction is the rupture or
erosion of an unstable atherosclerotic plaque. This exposes the highly thrombogenic
subendothelial matrix to the blood. This triggers platelet adhesion, aggregation, and the
activation of the coagulation cascade, forming a platelet-rich thrombus. This thrombus
occludes the artery, causing ischemia and infarction. Gradual narrowing usually causes
chronic angina, not an acute MI.
Question 6: A patient with heart failure develops peripheral edema. This is primarily
due to which of the following pathophysiological mechanisms?
A. Decreased capillary hydrostatic pressure due to reduced cardiac output.
B. Increased capillary permeability due to systemic inflammation.
C. Increased capillary hydrostatic pressure secondary to venous congestion.
D. Decreased plasma oncotic pressure due to liver dysfunction.
CORRECT ANSWER: C. Increased capillary hydrostatic pressure secondary to
venous congestion.
Rationale:In heart failure, especially right-sided failure, the heart is unable to pump
blood effectively. This leads to a backup of blood in the venous system, increasing the
venous pressure. This increased pressure is transmitted to the capillaries, raising the
capillary hydrostatic pressure. This high pressure forces fluid out of the capillaries and
into the interstitial space, causing peripheral edema.
Question 7: In a patient with type 1 diabetes mellitus, the primary
pathophysiological defect is:
A. Resistance of target cells to the effects of insulin.
B. An autoimmune destruction of the pancreatic beta cells, resulting in an absolute
insulin deficiency.
, C. A defect in the insulin receptor signaling pathway on liver and muscle cells.
D. Excessive production of insulin by the pancreatic alpha cells.
CORRECT ANSWER: B. An autoimmune destruction of the pancreatic beta cells,
resulting in an absolute insulin deficiency.
Rationale:Type 1 diabetes is an autoimmune disease. The body's immune system
attacks and destroys the beta cells located in the islets of Langerhans within the
pancreas. These beta cells are responsible for producing insulin. The destruction leads
to an absolute deficiency of insulin, making the patient dependent on exogenous insulin
for survival.
Question 8: A patient with liver cirrhosis is at risk for bleeding complications. This
is most directly related to which of the following pathophysiological consequences
of liver failure?
A. Decreased production of clotting factors by the hepatocytes.
B. Increased production of anti-clotting factors, such as protein C.
C. Impaired absorption of vitamin B12 due to gastric atrophy.
D. Hypersplenism leading to an increase in platelet production.
CORRECT ANSWER: A. Decreased production of clotting factors by the
hepatocytes.
Rationale:The liver is responsible for synthesizing most of the coagulation factors (with
the exception of factor VIII). In cirrhosis, the functional mass of the liver is greatly
reduced, and hepatocytes are replaced by fibrous scar tissue. This significantly impairs
the liver's ability to produce clotting factors (like prothrombin), leading to a
coagulopathy and an increased risk of bleeding.
Question 9: A patient with chronic kidney disease (CKD) is found to be anemic. This
anemia is primarily caused by:
A. A deficiency in dietary iron due to poor appetite.
B. Chronic blood loss from the gastrointestinal tract.
C. Decreased production of erythropoietin by the failing kidneys.
D. A vitamin B12 deficiency due to impaired absorption.
CORRECT ANSWER: C. Decreased production of erythropoietin by the failing
kidneys.
Rationale:The kidneys produce the hormone erythropoietin (EPO), which stimulates
the bone marrow to produce red blood cells. In CKD, the renal parenchyma is damaged
and cannot produce adequate amounts of EPO. This leads to a normocytic,
normochromic anemia, often referred to as the anemia of chronic disease or renal
anemia.
