Fall Semester 2026–2027 RASMUSSEN NUR2063 Essentials of Pathophysiology
Updated 2026 | 190+ Questions and Answers | Rasmussen University NUR2063
Study Guide, Practice Exam, Comprehensive Review, Exam Prep Test Bank, Cellular
Adaptation and Injury, Inflammation and Healing, Immune System Disorders,
Cardiovascular Pathophysiology, Respiratory Diseases, Endocrine Disorders,
Renal Dysfunction, Neurological Conditions, Detailed Rationales and Complete
Revision Material
Question 1: A 65-year-old male with a history of hypertension presents with a
sudden onset of severe, tearing chest pain radiating to his back. His blood pressure
is 180/100 mmHg in his right arm and 140/80 mmHg in his left arm. Which of the
following pathophysiological processes is the most likely cause of this
presentation?
A. Rupture of an atherosclerotic plaque in the coronary artery
B. A dissecting aneurysm of the thoracic aorta
C. A pulmonary embolism obstructing the main pulmonary artery
D. An acute myocardial infarction of the inferior wall
CORRECT ANSWER: B. A dissecting aneurysm of the thoracic aorta
Rationale:The classic presentation of an aortic dissection is a sudden, severe "tearing"
or "ripping" chest pain that often radiates to the back. A key clinical finding is a
discrepancy in blood pressure between the arms, indicating that the dissection flap is
compromising blood flow to the branches of the aortic arch. While myocardial
infarction and pulmonary embolism can cause chest pain, they do not typically present
with a tearing quality or blood pressure differentials. Aortic dissection is a tear in the
intimal layer of the aorta, allowing blood to enter the media and create a false lumen.
Question 2: A patient with chronic kidney disease has a serum potassium level of
6.8 mEq/L. Which of the following electrocardiogram (ECG) changes is most
consistent with this electrolyte disturbance?
A. Prominent U waves
B. Widened QRS complex and peaked T waves
C. Prolonged PR interval and flattened T waves
D. ST-segment depression and T-wave inversion
CORRECT ANSWER: B. Widened QRS complex and peaked T waves
Rationale:Hyperkalemia (elevated serum potassium) has characteristic ECG changes.
The earliest and most classic sign is tall, peaked, or "tented" T waves. As the potassium
level rises further, cardiac conduction is slowed, leading to a prolonged PR interval, a
widened QRS complex, and eventually a sine-wave pattern and asystole. Prominent U
waves are associated with hypokalemia. Prolonged PR and flattened T waves are more
characteristic of hypokalemia, and ST-segment depression is a non-specific finding.
Question 3: A 72-year-old patient is diagnosed with heart failure and is started on
furosemide. Which of the following electrolyte imbalances is this patient at the
highest risk for developing?
,A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hypermagnesemia
CORRECT ANSWER: B. Hypokalemia
Rationale:Furosemide is a loop diuretic that inhibits the sodium-potassium-chloride
cotransporter in the thick ascending limb of the loop of Henle. This action leads to
increased sodium delivery to the distal nephron, which promotes potassium secretion
into the urine. Consequently, a significant adverse effect of furosemide is hypokalemia.
The other choices are not typically caused by loop diuretics; they may cause
hyponatremia, hypocalcemia, and hypomagnesemia as well, but hypokalemia is the
most prominent and clinically significant risk.
Question 4: In a patient with untreated Type 1 Diabetes Mellitus, which of the
following metabolic changes is a direct result of a deficiency in insulin?
A. Increased glycogen synthesis in the liver
B. Increased glucose uptake by adipose tissue
C. Increased lipogenesis in adipose tissue
D. Increased gluconeogenesis in the liver
CORRECT ANSWER: D. Increased gluconeogenesis in the liver
Rationale:Insulin is an anabolic hormone that promotes storage of fuels. In its absence,
the liver does not receive the signal to stop producing glucose. Instead, it increases
gluconeogenesis (the synthesis of glucose from non-carbohydrate precursors) and
glycogenolysis (breakdown of glycogen). Insulin normally inhibits these processes and
promotes glycogen synthesis, glucose uptake, and lipogenesis. In the insulin-deficient
state of Type 1 DM, the liver releases excess glucose, contributing to hyperglycemia.
Question 5: A patient has a history of chronic alcoholism and presents with
confusion, ataxia, and ophthalmoplegia. This clinical triad is classic for a
deficiency of which of the following vitamins?
A. Vitamin B12 (Cobalamin)
B. Vitamin B1 (Thiamine)
C. Vitamin B3 (Niacin)
D. Vitamin B9 (Folate)
CORRECT ANSWER: B. Vitamin B1 (Thiamine)
Rationale:The classic triad of confusion, ataxia, and ophthalmoplegia is characteristic
of Wernicke's encephalopathy, which is caused by a severe deficiency of thiamine
(Vitamin B1). This condition is commonly seen in chronic alcoholics due to poor dietary
intake and impaired absorption. Thiamine is an essential cofactor for several enzymes
involved in carbohydrate metabolism, and its deficiency leads to neuronal damage in
specific areas of the brain. Vitamin B12 deficiency is associated with subacute
,combined degeneration of the spinal cord. Niacin deficiency causes pellagra
(dermatitis, diarrhea, dementia). Folate deficiency causes macrocytic anemia.
Question 6: Which of the following best describes the pathophysiological
mechanism of Type I hypersensitivity reactions?
A. Antigen-antibody complexes are deposited in tissues, leading to complement
activation and inflammation.
B. Antibodies bind to cell surface antigens, leading to cell destruction via phagocytosis
or complement.
C. Antigen cross-links IgE antibodies on the surface of mast cells, causing
degranulation and release of vasoactive amines.
D. Sensitized T-lymphocytes release cytokines that activate macrophages and cause
tissue damage.
CORRECT ANSWER: C. Antigen cross-links IgE antibodies on the surface of mast
cells, causing degranulation and release of vasoactive amines.
Rationale:Type I hypersensitivity is an immediate, IgE-mediated reaction. It occurs
when an antigen (allergen) cross-links IgE antibodies bound to the high-affinity FcεRI
receptors on the surface of mast cells and basophils. This cross-linking triggers
degranulation, releasing preformed mediators like histamine and tryptase, and
synthesizing new mediators like leukotrienes and prostaglandins, which cause
vasodilation, increased vascular permeability, and smooth muscle contraction. The
other choices describe Type III (immune complex), Type II (cytotoxic), and Type IV
(delayed-type) hypersensitivity reactions, respectively.
Question 7: A patient with chronic obstructive pulmonary disease (COPD) has
chronic hypoxemia. Which of the following physiological responses is most directly
responsible for the development of polycythemia in this patient?
A. Increased destruction of red blood cells
B. Decreased plasma volume
C. Increased production of erythropoietin
D. Increased iron absorption from the gastrointestinal tract
CORRECT ANSWER: C. Increased production of erythropoietin
Rationale:Chronic hypoxemia, as seen in COPD, is sensed by the kidney, which
responds by increasing the production and release of erythropoietin (EPO). EPO is a
hormone that stimulates the bone marrow to increase the production of red blood cells
(erythropoiesis). This compensatory mechanism, known as secondary polycythemia, is
aimed at increasing the oxygen-carrying capacity of the blood to improve tissue
oxygenation. It is not due to increased destruction or decreased plasma volume, and
while iron is needed, EPO is the primary driver for this response.
, Question 8: A patient with liver cirrhosis develops ascites and peripheral edema.
Which of the following pathophysiological mechanisms is the primary driver for
this fluid accumulation?
A. Decreased hydrostatic pressure in the portal system
B. Increased colloidal osmotic pressure due to hyperalbuminemia
C. Increased capillary hydrostatic pressure and decreased plasma oncotic pressure
D. Excessive aldosterone secretion leading to sodium retention without water
CORRECT ANSWER: C. Increased capillary hydrostatic pressure and decreased
plasma oncotic pressure
Rationale:Cirrhosis leads to portal hypertension, which increases the hydrostatic
pressure in the splanchnic capillaries, forcing fluid into the abdominal cavity (ascites)
and tissues. Concurrently, the diseased liver is unable to synthesize sufficient albumin,
leading to hypoalbuminemia and decreased plasma oncotic (colloid osmotic) pressure.
This reduced oncotic pressure makes it easier for fluid to leave the capillaries and stay
in the interstitial space. The overall effect is an imbalance in Starling forces that favors
the formation of edema and ascites.
Question 9: A patient is diagnosed with a gastrointestinal bleed and presents with
fatigue, pallor, and tachycardia. Laboratory results show a low hemoglobin and
hematocrit. Which of the following best describes the type of anemia this patient is
most likely experiencing?
A. Aplastic anemia
B. Hemolytic anemia
C. Iron-deficiency anemia
D. Megaloblastic anemia
CORRECT ANSWER: C. Iron-deficiency anemia
Rationale:A gastrointestinal bleed is a classic cause of iron-deficiency anemia. Chronic
blood loss leads to the loss of iron, which is an essential component of hemoglobin.
The body's iron stores are depleted, leading to a microcytic, hypochromic anemia.
Aplastic anemia is due to bone marrow failure. Hemolytic anemia results from
increased red blood cell destruction. Megaloblastic anemia is due to vitamin B12 or
folate deficiency, which causes a macrocytic anemia.
Question 10: A patient presents with "steatorrhea" (fatty stools), weight loss, and a
skin rash. Laboratory testing reveals a deficiency of fat-soluble vitamins. Which of
the following gastrointestinal organs is most likely dysfunctional in this patient?
A. Stomach
B. Liver
C. Pancreas
D. Large intestine
CORRECT ANSWER: C. Pancreas
Updated 2026 | 190+ Questions and Answers | Rasmussen University NUR2063
Study Guide, Practice Exam, Comprehensive Review, Exam Prep Test Bank, Cellular
Adaptation and Injury, Inflammation and Healing, Immune System Disorders,
Cardiovascular Pathophysiology, Respiratory Diseases, Endocrine Disorders,
Renal Dysfunction, Neurological Conditions, Detailed Rationales and Complete
Revision Material
Question 1: A 65-year-old male with a history of hypertension presents with a
sudden onset of severe, tearing chest pain radiating to his back. His blood pressure
is 180/100 mmHg in his right arm and 140/80 mmHg in his left arm. Which of the
following pathophysiological processes is the most likely cause of this
presentation?
A. Rupture of an atherosclerotic plaque in the coronary artery
B. A dissecting aneurysm of the thoracic aorta
C. A pulmonary embolism obstructing the main pulmonary artery
D. An acute myocardial infarction of the inferior wall
CORRECT ANSWER: B. A dissecting aneurysm of the thoracic aorta
Rationale:The classic presentation of an aortic dissection is a sudden, severe "tearing"
or "ripping" chest pain that often radiates to the back. A key clinical finding is a
discrepancy in blood pressure between the arms, indicating that the dissection flap is
compromising blood flow to the branches of the aortic arch. While myocardial
infarction and pulmonary embolism can cause chest pain, they do not typically present
with a tearing quality or blood pressure differentials. Aortic dissection is a tear in the
intimal layer of the aorta, allowing blood to enter the media and create a false lumen.
Question 2: A patient with chronic kidney disease has a serum potassium level of
6.8 mEq/L. Which of the following electrocardiogram (ECG) changes is most
consistent with this electrolyte disturbance?
A. Prominent U waves
B. Widened QRS complex and peaked T waves
C. Prolonged PR interval and flattened T waves
D. ST-segment depression and T-wave inversion
CORRECT ANSWER: B. Widened QRS complex and peaked T waves
Rationale:Hyperkalemia (elevated serum potassium) has characteristic ECG changes.
The earliest and most classic sign is tall, peaked, or "tented" T waves. As the potassium
level rises further, cardiac conduction is slowed, leading to a prolonged PR interval, a
widened QRS complex, and eventually a sine-wave pattern and asystole. Prominent U
waves are associated with hypokalemia. Prolonged PR and flattened T waves are more
characteristic of hypokalemia, and ST-segment depression is a non-specific finding.
Question 3: A 72-year-old patient is diagnosed with heart failure and is started on
furosemide. Which of the following electrolyte imbalances is this patient at the
highest risk for developing?
,A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hypermagnesemia
CORRECT ANSWER: B. Hypokalemia
Rationale:Furosemide is a loop diuretic that inhibits the sodium-potassium-chloride
cotransporter in the thick ascending limb of the loop of Henle. This action leads to
increased sodium delivery to the distal nephron, which promotes potassium secretion
into the urine. Consequently, a significant adverse effect of furosemide is hypokalemia.
The other choices are not typically caused by loop diuretics; they may cause
hyponatremia, hypocalcemia, and hypomagnesemia as well, but hypokalemia is the
most prominent and clinically significant risk.
Question 4: In a patient with untreated Type 1 Diabetes Mellitus, which of the
following metabolic changes is a direct result of a deficiency in insulin?
A. Increased glycogen synthesis in the liver
B. Increased glucose uptake by adipose tissue
C. Increased lipogenesis in adipose tissue
D. Increased gluconeogenesis in the liver
CORRECT ANSWER: D. Increased gluconeogenesis in the liver
Rationale:Insulin is an anabolic hormone that promotes storage of fuels. In its absence,
the liver does not receive the signal to stop producing glucose. Instead, it increases
gluconeogenesis (the synthesis of glucose from non-carbohydrate precursors) and
glycogenolysis (breakdown of glycogen). Insulin normally inhibits these processes and
promotes glycogen synthesis, glucose uptake, and lipogenesis. In the insulin-deficient
state of Type 1 DM, the liver releases excess glucose, contributing to hyperglycemia.
Question 5: A patient has a history of chronic alcoholism and presents with
confusion, ataxia, and ophthalmoplegia. This clinical triad is classic for a
deficiency of which of the following vitamins?
A. Vitamin B12 (Cobalamin)
B. Vitamin B1 (Thiamine)
C. Vitamin B3 (Niacin)
D. Vitamin B9 (Folate)
CORRECT ANSWER: B. Vitamin B1 (Thiamine)
Rationale:The classic triad of confusion, ataxia, and ophthalmoplegia is characteristic
of Wernicke's encephalopathy, which is caused by a severe deficiency of thiamine
(Vitamin B1). This condition is commonly seen in chronic alcoholics due to poor dietary
intake and impaired absorption. Thiamine is an essential cofactor for several enzymes
involved in carbohydrate metabolism, and its deficiency leads to neuronal damage in
specific areas of the brain. Vitamin B12 deficiency is associated with subacute
,combined degeneration of the spinal cord. Niacin deficiency causes pellagra
(dermatitis, diarrhea, dementia). Folate deficiency causes macrocytic anemia.
Question 6: Which of the following best describes the pathophysiological
mechanism of Type I hypersensitivity reactions?
A. Antigen-antibody complexes are deposited in tissues, leading to complement
activation and inflammation.
B. Antibodies bind to cell surface antigens, leading to cell destruction via phagocytosis
or complement.
C. Antigen cross-links IgE antibodies on the surface of mast cells, causing
degranulation and release of vasoactive amines.
D. Sensitized T-lymphocytes release cytokines that activate macrophages and cause
tissue damage.
CORRECT ANSWER: C. Antigen cross-links IgE antibodies on the surface of mast
cells, causing degranulation and release of vasoactive amines.
Rationale:Type I hypersensitivity is an immediate, IgE-mediated reaction. It occurs
when an antigen (allergen) cross-links IgE antibodies bound to the high-affinity FcεRI
receptors on the surface of mast cells and basophils. This cross-linking triggers
degranulation, releasing preformed mediators like histamine and tryptase, and
synthesizing new mediators like leukotrienes and prostaglandins, which cause
vasodilation, increased vascular permeability, and smooth muscle contraction. The
other choices describe Type III (immune complex), Type II (cytotoxic), and Type IV
(delayed-type) hypersensitivity reactions, respectively.
Question 7: A patient with chronic obstructive pulmonary disease (COPD) has
chronic hypoxemia. Which of the following physiological responses is most directly
responsible for the development of polycythemia in this patient?
A. Increased destruction of red blood cells
B. Decreased plasma volume
C. Increased production of erythropoietin
D. Increased iron absorption from the gastrointestinal tract
CORRECT ANSWER: C. Increased production of erythropoietin
Rationale:Chronic hypoxemia, as seen in COPD, is sensed by the kidney, which
responds by increasing the production and release of erythropoietin (EPO). EPO is a
hormone that stimulates the bone marrow to increase the production of red blood cells
(erythropoiesis). This compensatory mechanism, known as secondary polycythemia, is
aimed at increasing the oxygen-carrying capacity of the blood to improve tissue
oxygenation. It is not due to increased destruction or decreased plasma volume, and
while iron is needed, EPO is the primary driver for this response.
, Question 8: A patient with liver cirrhosis develops ascites and peripheral edema.
Which of the following pathophysiological mechanisms is the primary driver for
this fluid accumulation?
A. Decreased hydrostatic pressure in the portal system
B. Increased colloidal osmotic pressure due to hyperalbuminemia
C. Increased capillary hydrostatic pressure and decreased plasma oncotic pressure
D. Excessive aldosterone secretion leading to sodium retention without water
CORRECT ANSWER: C. Increased capillary hydrostatic pressure and decreased
plasma oncotic pressure
Rationale:Cirrhosis leads to portal hypertension, which increases the hydrostatic
pressure in the splanchnic capillaries, forcing fluid into the abdominal cavity (ascites)
and tissues. Concurrently, the diseased liver is unable to synthesize sufficient albumin,
leading to hypoalbuminemia and decreased plasma oncotic (colloid osmotic) pressure.
This reduced oncotic pressure makes it easier for fluid to leave the capillaries and stay
in the interstitial space. The overall effect is an imbalance in Starling forces that favors
the formation of edema and ascites.
Question 9: A patient is diagnosed with a gastrointestinal bleed and presents with
fatigue, pallor, and tachycardia. Laboratory results show a low hemoglobin and
hematocrit. Which of the following best describes the type of anemia this patient is
most likely experiencing?
A. Aplastic anemia
B. Hemolytic anemia
C. Iron-deficiency anemia
D. Megaloblastic anemia
CORRECT ANSWER: C. Iron-deficiency anemia
Rationale:A gastrointestinal bleed is a classic cause of iron-deficiency anemia. Chronic
blood loss leads to the loss of iron, which is an essential component of hemoglobin.
The body's iron stores are depleted, leading to a microcytic, hypochromic anemia.
Aplastic anemia is due to bone marrow failure. Hemolytic anemia results from
increased red blood cell destruction. Megaloblastic anemia is due to vitamin B12 or
folate deficiency, which causes a macrocytic anemia.
Question 10: A patient presents with "steatorrhea" (fatty stools), weight loss, and a
skin rash. Laboratory testing reveals a deficiency of fat-soluble vitamins. Which of
the following gastrointestinal organs is most likely dysfunctional in this patient?
A. Stomach
B. Liver
C. Pancreas
D. Large intestine
CORRECT ANSWER: C. Pancreas
