NUR2063 ESSENTIALS OF PATHOPHYSIOLOGY
COMPLETE QUESTIONS & ANSWERS WITH
DETAILED RATIONALES – RASMUSSEN
UNIVERSITY FALL SEMESTER
Question 1: A 72-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
130/80 mmHg in his left arm. Which of the following
pathophysiological processes is most likely responsible for his
presentation?
A. Spasm of the esophageal smooth muscle
B. Rupture of an atherosclerotic plaque in the coronary artery
C. Occlusion of the pulmonary artery by a thrombus
D. Dissection of the tunica media of the aorta
CORRECT ANSWER: D. Dissection of the tunica media of the aorta
Rationale: The patient's presentation of acute, tearing chest pain
radiating to the back, along with a differential blood pressure between
arms, is classic for an aortic dissection. This occurs when a tear in the
intima allows blood to enter the tunica media, creating a false lumen
that can propagate and compromise branch vessels, leading to pulse
deficits.
,Question 2: A 65-year-old female with a long history of type 2
diabetes mellitus is diagnosed with chronic kidney disease. Her
hemoglobin A1c is 9.2%. Which of the following best describes the
primary mechanism by which chronic hyperglycemia contributes to
her renal pathology?
A. Direct toxic effect of glucose on the glomerular podocytes
B. Ischemic injury due to macrovascular atherosclerosis
C. Autoimmune destruction of the renal tubules
D. Non-enzymatic glycosylation of basement membrane proteins
leading to thickening
CORRECT ANSWER: D. Non-enzymatic glycosylation of basement
membrane proteins leading to thickening
Rationale: Chronic hyperglycemia leads to the formation of advanced
glycation end-products (AGEs) through non-enzymatic glycosylation.
These AGEs accumulate in the glomerular basement membrane,
causing thickening and increased permeability, which is a hallmark of
diabetic nephropathy. This process also stimulates mesangial expansion
and fibrosis.
Question 3: A patient with a history of heart failure develops ascites
and peripheral edema. This fluid accumulation is primarily due to
which of the following pathophysiological mechanisms?
A. Increased capillary permeability due to systemic inflammation
B. Lymphatic obstruction causing impaired fluid return
C. Decreased plasma oncotic pressure due to liver failure
D. Increased hydrostatic pressure in the venous system
,CORRECT ANSWER: D. Increased hydrostatic pressure in the venous
system
Rationale: In heart failure, the heart's inability to pump effectively leads
to a backup of blood, increasing venous hydrostatic pressure. This
elevated pressure forces fluid out of the capillaries and into the
interstitial space, leading to edema and, when severe in the liver and
portal circulation, ascites.
Question 4: A 45-year-old male presents with jaundice, dark urine,
and clay-colored stools. Laboratory tests reveal elevated direct
bilirubin and alkaline phosphatase. This clinical picture is most
consistent with which type of jaundice?
A. Unconjugated hyperbilirubinemia
B. Hepatic jaundice
C. Pre-hepatic jaundice
D. Post-hepatic (obstructive) jaundice
CORRECT ANSWER: D. Post-hepatic (obstructive) jaundice
Rationale: The presence of dark urine, clay-colored stools, and elevated
direct (conjugated) bilirubin with a high alkaline phosphatase indicates
an obstruction in the biliary tree. This prevents conjugated bilirubin
from reaching the intestines, where it is normally converted to
urobilinogen (causing brown stool), and it backs up into the blood,
being excreted in the urine.
Question 5: A patient with severe sepsis develops acute respiratory
distress syndrome (ARDS). Which of the following pathophysiological
changes is the hallmark of this condition?
, A. Atelectasis due to obstruction of airways by a foreign body
B. Bronchoconstriction and mucus hypersecretion
C. Increased alveolar surface tension due to surfactant deficiency
D. Diffuse alveolar damage leading to increased capillary permeability
CORRECT ANSWER: D. Diffuse alveolar damage leading to increased
capillary permeability
Rationale: ARDS is characterized by an acute inflammatory response in
the lung parenchyma, often triggered by a systemic insult like sepsis.
This causes diffuse alveolar damage, which disrupts the alveolar-
capillary membrane and leads to increased permeability. This results in
the leakage of protein-rich fluid into the alveolar spaces, causing
pulmonary edema, impaired gas exchange, and stiff lungs.
Question 6: A child is diagnosed with cystic fibrosis. Which of the
following best describes the underlying genetic defect and its primary
physiological consequence?
A. Mutation in the gene encoding for dystrophin protein
B. Deletion of a phenylalanine residue in the alpha-1 antitrypsin protein
C. Autosomal dominant mutation causing abnormal hemoglobin
structure
D. Mutation in the CFTR gene leading to defective chloride transport
and thick, viscous secretions
CORRECT ANSWER: D. Mutation in the CFTR gene leading to defective
chloride transport and thick, viscous secretions
Rationale: Cystic fibrosis is caused by a mutation in the cystic fibrosis
transmembrane conductance regulator (CFTR) gene, most commonly a
deletion of phenylalanine at position 508. This defect impairs chloride
COMPLETE QUESTIONS & ANSWERS WITH
DETAILED RATIONALES – RASMUSSEN
UNIVERSITY FALL SEMESTER
Question 1: A 72-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
130/80 mmHg in his left arm. Which of the following
pathophysiological processes is most likely responsible for his
presentation?
A. Spasm of the esophageal smooth muscle
B. Rupture of an atherosclerotic plaque in the coronary artery
C. Occlusion of the pulmonary artery by a thrombus
D. Dissection of the tunica media of the aorta
CORRECT ANSWER: D. Dissection of the tunica media of the aorta
Rationale: The patient's presentation of acute, tearing chest pain
radiating to the back, along with a differential blood pressure between
arms, is classic for an aortic dissection. This occurs when a tear in the
intima allows blood to enter the tunica media, creating a false lumen
that can propagate and compromise branch vessels, leading to pulse
deficits.
,Question 2: A 65-year-old female with a long history of type 2
diabetes mellitus is diagnosed with chronic kidney disease. Her
hemoglobin A1c is 9.2%. Which of the following best describes the
primary mechanism by which chronic hyperglycemia contributes to
her renal pathology?
A. Direct toxic effect of glucose on the glomerular podocytes
B. Ischemic injury due to macrovascular atherosclerosis
C. Autoimmune destruction of the renal tubules
D. Non-enzymatic glycosylation of basement membrane proteins
leading to thickening
CORRECT ANSWER: D. Non-enzymatic glycosylation of basement
membrane proteins leading to thickening
Rationale: Chronic hyperglycemia leads to the formation of advanced
glycation end-products (AGEs) through non-enzymatic glycosylation.
These AGEs accumulate in the glomerular basement membrane,
causing thickening and increased permeability, which is a hallmark of
diabetic nephropathy. This process also stimulates mesangial expansion
and fibrosis.
Question 3: A patient with a history of heart failure develops ascites
and peripheral edema. This fluid accumulation is primarily due to
which of the following pathophysiological mechanisms?
A. Increased capillary permeability due to systemic inflammation
B. Lymphatic obstruction causing impaired fluid return
C. Decreased plasma oncotic pressure due to liver failure
D. Increased hydrostatic pressure in the venous system
,CORRECT ANSWER: D. Increased hydrostatic pressure in the venous
system
Rationale: In heart failure, the heart's inability to pump effectively leads
to a backup of blood, increasing venous hydrostatic pressure. This
elevated pressure forces fluid out of the capillaries and into the
interstitial space, leading to edema and, when severe in the liver and
portal circulation, ascites.
Question 4: A 45-year-old male presents with jaundice, dark urine,
and clay-colored stools. Laboratory tests reveal elevated direct
bilirubin and alkaline phosphatase. This clinical picture is most
consistent with which type of jaundice?
A. Unconjugated hyperbilirubinemia
B. Hepatic jaundice
C. Pre-hepatic jaundice
D. Post-hepatic (obstructive) jaundice
CORRECT ANSWER: D. Post-hepatic (obstructive) jaundice
Rationale: The presence of dark urine, clay-colored stools, and elevated
direct (conjugated) bilirubin with a high alkaline phosphatase indicates
an obstruction in the biliary tree. This prevents conjugated bilirubin
from reaching the intestines, where it is normally converted to
urobilinogen (causing brown stool), and it backs up into the blood,
being excreted in the urine.
Question 5: A patient with severe sepsis develops acute respiratory
distress syndrome (ARDS). Which of the following pathophysiological
changes is the hallmark of this condition?
, A. Atelectasis due to obstruction of airways by a foreign body
B. Bronchoconstriction and mucus hypersecretion
C. Increased alveolar surface tension due to surfactant deficiency
D. Diffuse alveolar damage leading to increased capillary permeability
CORRECT ANSWER: D. Diffuse alveolar damage leading to increased
capillary permeability
Rationale: ARDS is characterized by an acute inflammatory response in
the lung parenchyma, often triggered by a systemic insult like sepsis.
This causes diffuse alveolar damage, which disrupts the alveolar-
capillary membrane and leads to increased permeability. This results in
the leakage of protein-rich fluid into the alveolar spaces, causing
pulmonary edema, impaired gas exchange, and stiff lungs.
Question 6: A child is diagnosed with cystic fibrosis. Which of the
following best describes the underlying genetic defect and its primary
physiological consequence?
A. Mutation in the gene encoding for dystrophin protein
B. Deletion of a phenylalanine residue in the alpha-1 antitrypsin protein
C. Autosomal dominant mutation causing abnormal hemoglobin
structure
D. Mutation in the CFTR gene leading to defective chloride transport
and thick, viscous secretions
CORRECT ANSWER: D. Mutation in the CFTR gene leading to defective
chloride transport and thick, viscous secretions
Rationale: Cystic fibrosis is caused by a mutation in the cystic fibrosis
transmembrane conductance regulator (CFTR) gene, most commonly a
deletion of phenylalanine at position 508. This defect impairs chloride
