BIO 322 Exam 2 V1 | BIO 322 Applied
Pathophysiology | Actual Q&A with
Rationale (BIO322 Exam 2) | Grand Canyon
University
1. A patient presents to the emergency department with dyspnea, orthopnea, and
paroxysmal nocturnal dyspnea. Which of the following clinical manifestations are associated
with left-sided heart failure? (Select all that apply)
A. Pulmonary edema and crackles
B. Peripheral edema in the lower extremities
C. Decreased cardiac output
D. Ascites and hepatomegaly
E. Cough with frothy sputum
F. Jugular venous distension (JVD)
Correct Answer: A, C, E
Rationale: Left-sided heart failure occurs when the left ventricle is unable to effectively
pump blood into the systemic circulation, leading to a backup of pressure into the
pulmonary system. This backup results in pulmonary congestion and edema, which
manifests as crackles and frothy sputum. In contrast, peripheral edema and JVD are classic
signs of right-sided heart failure where blood backs up into the systemic venous system.
,2. A 65-year-old patient with a long history of smoking is diagnosed with emphysema. What is
the primary underlying pathophysiology of this condition?
A. Chronic inflammation and mucus hypersecretion in the large airways
B. Permanent enlargement of gas-exchange airways and destruction of alveolar walls
C. Reversible bronchospasm caused by hyperresponsiveness to allergens
D. Accumulation of fluid in the pleural space due to increased hydrostatic pressure
Correct Answer: B
Rationale: Emphysema is characterized by the destruction of the alveolar septa and loss of
elastic recoil, which leads to air trapping and hyperinflation. This process is often driven by
an imbalance between proteases and antiproteases, frequently exacerbated by cigarette
smoke. Unlike chronic bronchitis, the primary issue in emphysema is the loss of surface
area for gas exchange within the lung parenchyma.
3. Which laboratory value is the most sensitive and specific biomarker for identifying
myocardial infarction (MI)?
A. Creatine kinase (CK-MB)
B. Myoglobin
C. Cardiac Troponin I (cTnI)
D. C-reactive protein (CRP)
Correct Answer: C
,Rationale: Cardiac troponin I is highly specific to myocardial tissue and remains elevated
for a longer period compared to other markers. It is considered the gold standard for
diagnosing acute myocardial infarction because it is not typically found in the blood of
healthy individuals. While CK-MB was used in the past, it is less specific than troponin
because it can also be found in skeletal muscle.
4. A patient is admitted with a deep vein thrombosis (DVT). Which factors comprise Virchow’s
Triad, increasing the risk for thrombus formation? (Select all that apply)
A. Endothelial injury
B. Stasis of blood flow
C. Hypercoagulability
D. Hypovolemia
E. Polycythemia
F. Vasodilation
Correct Answer: A, B, C
Rationale: Virchow’s Triad represents the three broad categories of factors thought to
contribute to thrombosis. Endothelial injury provides a site for platelet adhesion, while
stasis of blood flow prevents the dilution of activated clotting factors. Hypercoagulability
refers to an altered state of blood chemistry that predisposes the patient to clot formation.
5. What is the primary cause of pernicious anemia in an adult patient?
A. Lack of intrinsic factor due to gastric mucosal atrophy
, B. Dietary deficiency of iron and vitamin C
C. Chronic blood loss from the gastrointestinal tract
D. Premature destruction of red blood cells in the spleen
Correct Answer: A
Rationale: Pernicious anemia is a type of megaloblastic anemia caused by the
malabsorption of vitamin B12. This occurs because the gastric parietal cells fail to produce
intrinsic factor, which is necessary for B12 absorption in the ileum. Without sufficient B12,
DNA synthesis in red blood cells is impaired, leading to the production of large, immature
macrocytes.
6. Which condition is characterized by a rapid decline in renal function, often following severe
hypotension or exposure to nephrotoxic agents?
A. Acute Kidney Injury (AKI)
B. Nephrotic Syndrome
C. Chronic Kidney Disease (CKD)
D. Polycystic Kidney Disease
Correct Answer: A
Rationale: Acute Kidney Injury (AKI) is an abrupt decline in kidney function that results in
the accumulation of nitrogenous waste products like BUN and creatinine. It is often
classified into prerenal, intrarenal, and postrenal categories depending on the location of
Pathophysiology | Actual Q&A with
Rationale (BIO322 Exam 2) | Grand Canyon
University
1. A patient presents to the emergency department with dyspnea, orthopnea, and
paroxysmal nocturnal dyspnea. Which of the following clinical manifestations are associated
with left-sided heart failure? (Select all that apply)
A. Pulmonary edema and crackles
B. Peripheral edema in the lower extremities
C. Decreased cardiac output
D. Ascites and hepatomegaly
E. Cough with frothy sputum
F. Jugular venous distension (JVD)
Correct Answer: A, C, E
Rationale: Left-sided heart failure occurs when the left ventricle is unable to effectively
pump blood into the systemic circulation, leading to a backup of pressure into the
pulmonary system. This backup results in pulmonary congestion and edema, which
manifests as crackles and frothy sputum. In contrast, peripheral edema and JVD are classic
signs of right-sided heart failure where blood backs up into the systemic venous system.
,2. A 65-year-old patient with a long history of smoking is diagnosed with emphysema. What is
the primary underlying pathophysiology of this condition?
A. Chronic inflammation and mucus hypersecretion in the large airways
B. Permanent enlargement of gas-exchange airways and destruction of alveolar walls
C. Reversible bronchospasm caused by hyperresponsiveness to allergens
D. Accumulation of fluid in the pleural space due to increased hydrostatic pressure
Correct Answer: B
Rationale: Emphysema is characterized by the destruction of the alveolar septa and loss of
elastic recoil, which leads to air trapping and hyperinflation. This process is often driven by
an imbalance between proteases and antiproteases, frequently exacerbated by cigarette
smoke. Unlike chronic bronchitis, the primary issue in emphysema is the loss of surface
area for gas exchange within the lung parenchyma.
3. Which laboratory value is the most sensitive and specific biomarker for identifying
myocardial infarction (MI)?
A. Creatine kinase (CK-MB)
B. Myoglobin
C. Cardiac Troponin I (cTnI)
D. C-reactive protein (CRP)
Correct Answer: C
,Rationale: Cardiac troponin I is highly specific to myocardial tissue and remains elevated
for a longer period compared to other markers. It is considered the gold standard for
diagnosing acute myocardial infarction because it is not typically found in the blood of
healthy individuals. While CK-MB was used in the past, it is less specific than troponin
because it can also be found in skeletal muscle.
4. A patient is admitted with a deep vein thrombosis (DVT). Which factors comprise Virchow’s
Triad, increasing the risk for thrombus formation? (Select all that apply)
A. Endothelial injury
B. Stasis of blood flow
C. Hypercoagulability
D. Hypovolemia
E. Polycythemia
F. Vasodilation
Correct Answer: A, B, C
Rationale: Virchow’s Triad represents the three broad categories of factors thought to
contribute to thrombosis. Endothelial injury provides a site for platelet adhesion, while
stasis of blood flow prevents the dilution of activated clotting factors. Hypercoagulability
refers to an altered state of blood chemistry that predisposes the patient to clot formation.
5. What is the primary cause of pernicious anemia in an adult patient?
A. Lack of intrinsic factor due to gastric mucosal atrophy
, B. Dietary deficiency of iron and vitamin C
C. Chronic blood loss from the gastrointestinal tract
D. Premature destruction of red blood cells in the spleen
Correct Answer: A
Rationale: Pernicious anemia is a type of megaloblastic anemia caused by the
malabsorption of vitamin B12. This occurs because the gastric parietal cells fail to produce
intrinsic factor, which is necessary for B12 absorption in the ileum. Without sufficient B12,
DNA synthesis in red blood cells is impaired, leading to the production of large, immature
macrocytes.
6. Which condition is characterized by a rapid decline in renal function, often following severe
hypotension or exposure to nephrotoxic agents?
A. Acute Kidney Injury (AKI)
B. Nephrotic Syndrome
C. Chronic Kidney Disease (CKD)
D. Polycystic Kidney Disease
Correct Answer: A
Rationale: Acute Kidney Injury (AKI) is an abrupt decline in kidney function that results in
the accumulation of nitrogenous waste products like BUN and creatinine. It is often
classified into prerenal, intrarenal, and postrenal categories depending on the location of
