NURS 6501 Advanced Pathophysiology
Midterm Exam Hematology Cardiology
Oncology Diagnostic Markers Actual Exam
2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
Q1: A 58-year-old patient presents with crushing substernal chest pain. Troponin I is elevated at
6.2 ng/mL (normal <0.04) drawn 4 hours after symptom onset. Which cardiac biomarker rises
earliest following myocardial infarction and returns to normal within 24 hours?
A. Creatine kinase-MB
B. Troponin I
C. Myoglobin [CORRECT]
D. Natriuretic peptide
Correct Answer: C
Rationale: Correct because myoglobin rises within 1–3 hours after myocardial infarction, peaks at
6–12 hours, and returns to baseline within 24 hours, making it the earliest rising biomarker though
least cardiac-specific.
Q2: Which glycoprotein hormone is primarily produced by peritubular interstitial fibroblasts in the
kidney and regulates erythropoiesis in response to tissue hypoxia?
A. Thrombopoietin
B. Granulocyte colony-stimulating factor
C. Erythropoietin [CORRECT]
D. Interleukin-6
Correct Answer: C
,Rationale: Correct because erythropoietin is synthesized mainly in the kidney in response to
hypoxia and stimulates erythropoiesis in the bone marrow by preventing apoptosis of erythroid
progenitor cells.
Q3: A patient with chronic alcohol use disorder presents with macrocytic anemia (MCV 112 fL).
Which vitamin deficiency most commonly contributes to this hematologic finding in this population?
A. Vitamin B6
B. Vitamin C
C. Folate [CORRECT]
D. Vitamin K
Correct Answer: C
Rationale: Correct because chronic alcohol use commonly causes folate deficiency due to poor
dietary intake, malabsorption, and increased urinary excretion, resulting in macrocytic anemia with
elevated MCV.
Q4: In the cardiac action potential, which ion is responsible for rapid depolarization during phase 0
in ventricular myocytes?
A. Calcium influx through L-type channels
B. Potassium efflux through delayed rectifier channels
C. Sodium influx through fast voltage-gated channels [CORRECT]
D. Chloride influx through ligand-gated channels
Correct Answer: C
Rationale: Correct because phase 0 rapid depolarization in non-pacemaker cardiac myocytes is
mediated by fast voltage-gated sodium channel opening, causing rapid sodium influx and
membrane depolarization.
Q5: A 34-year-old woman develops thrombocytopenia (platelet count 48,000/μL) five days after
initiating unfractionated heparin therapy. Platelet factor 4-heparin complex antibodies are detected.
What is the priority pathophysiologic mechanism?
A. Direct bone marrow suppression by heparin
B. Complement-mediated intravascular hemolysis
C. Immune-mediated platelet activation and consumption [CORRECT]
D. ADAMTS13 deficiency causing microangiopathy
Correct Answer: C
Rationale: Correct because heparin-induced thrombocytopenia (HIT) is an immune prothrombotic
disorder caused by IgG antibodies against platelet factor 4-heparin complexes, leading to platelet
activation, consumption, and thrombosis rather than bleeding.
, Q6: Which tumor marker is most specific for monitoring response to therapy in colorectal
adenocarcinoma?
A. CA 19-9
B. CA-125
C. Carcinoembryonic antigen (CEA) [CORRECT]
D. Alpha-fetoprotein (AFP)
Correct Answer: C
Rationale: Correct because CEA is the established tumor marker for colorectal cancer monitoring;
baseline and serial levels assess treatment response and detect recurrence, though it is not
recommended for screening asymptomatic populations.
Q7: A patient presents with pancytopenia, hypercellular bone marrow with dysplastic changes in
multiple cell lines, and 5% ringed sideroblasts. No Auer rods or increased blasts are identified.
Which diagnosis is most consistent?
A. Acute myeloid leukemia
B. Chronic lymphocytic leukemia
C. Myelodysplastic syndrome [CORRECT]
D. Aplastic anemia
Correct Answer: C
Rationale: Correct because myelodysplastic syndrome is characterized by peripheral cytopenias
despite hypercellular bone marrow, multilineage dysplasia, and ringed sideroblasts without meeting
criteria for acute leukemia.
Q8: In the pathogenesis of atherosclerosis, which cellular event represents the initial response to
endothelial dysfunction and lipid accumulation?
A. Smooth muscle cell proliferation and collagen deposition
B. Fibrous cap formation over a lipid core
C. Monocyte adhesion and transmigration into the intima [CORRECT]
D. Plaque rupture and thrombus formation
Correct Answer: C
Rationale: Correct because endothelial dysfunction promotes monocyte adhesion to the vascular
endothelium, followed by transmigration into the intima where they differentiate into macrophages
and engulf oxidized LDL, forming foam cells in the fatty streak lesion.
Q9: Which electrocardiographic finding is pathognomonic for atrial flutter?
A. Irregularly irregular rhythm with absent P waves
B. Prolonged PR interval with dropped beats
C. Sawtooth flutter waves at 250–350 bpm [CORRECT]
Midterm Exam Hematology Cardiology
Oncology Diagnostic Markers Actual Exam
2026/2027 with Detailed Rationales |
Complete Exam-Style Questions | Pass
Guaranteed – A+ Graded
Q1: A 58-year-old patient presents with crushing substernal chest pain. Troponin I is elevated at
6.2 ng/mL (normal <0.04) drawn 4 hours after symptom onset. Which cardiac biomarker rises
earliest following myocardial infarction and returns to normal within 24 hours?
A. Creatine kinase-MB
B. Troponin I
C. Myoglobin [CORRECT]
D. Natriuretic peptide
Correct Answer: C
Rationale: Correct because myoglobin rises within 1–3 hours after myocardial infarction, peaks at
6–12 hours, and returns to baseline within 24 hours, making it the earliest rising biomarker though
least cardiac-specific.
Q2: Which glycoprotein hormone is primarily produced by peritubular interstitial fibroblasts in the
kidney and regulates erythropoiesis in response to tissue hypoxia?
A. Thrombopoietin
B. Granulocyte colony-stimulating factor
C. Erythropoietin [CORRECT]
D. Interleukin-6
Correct Answer: C
,Rationale: Correct because erythropoietin is synthesized mainly in the kidney in response to
hypoxia and stimulates erythropoiesis in the bone marrow by preventing apoptosis of erythroid
progenitor cells.
Q3: A patient with chronic alcohol use disorder presents with macrocytic anemia (MCV 112 fL).
Which vitamin deficiency most commonly contributes to this hematologic finding in this population?
A. Vitamin B6
B. Vitamin C
C. Folate [CORRECT]
D. Vitamin K
Correct Answer: C
Rationale: Correct because chronic alcohol use commonly causes folate deficiency due to poor
dietary intake, malabsorption, and increased urinary excretion, resulting in macrocytic anemia with
elevated MCV.
Q4: In the cardiac action potential, which ion is responsible for rapid depolarization during phase 0
in ventricular myocytes?
A. Calcium influx through L-type channels
B. Potassium efflux through delayed rectifier channels
C. Sodium influx through fast voltage-gated channels [CORRECT]
D. Chloride influx through ligand-gated channels
Correct Answer: C
Rationale: Correct because phase 0 rapid depolarization in non-pacemaker cardiac myocytes is
mediated by fast voltage-gated sodium channel opening, causing rapid sodium influx and
membrane depolarization.
Q5: A 34-year-old woman develops thrombocytopenia (platelet count 48,000/μL) five days after
initiating unfractionated heparin therapy. Platelet factor 4-heparin complex antibodies are detected.
What is the priority pathophysiologic mechanism?
A. Direct bone marrow suppression by heparin
B. Complement-mediated intravascular hemolysis
C. Immune-mediated platelet activation and consumption [CORRECT]
D. ADAMTS13 deficiency causing microangiopathy
Correct Answer: C
Rationale: Correct because heparin-induced thrombocytopenia (HIT) is an immune prothrombotic
disorder caused by IgG antibodies against platelet factor 4-heparin complexes, leading to platelet
activation, consumption, and thrombosis rather than bleeding.
, Q6: Which tumor marker is most specific for monitoring response to therapy in colorectal
adenocarcinoma?
A. CA 19-9
B. CA-125
C. Carcinoembryonic antigen (CEA) [CORRECT]
D. Alpha-fetoprotein (AFP)
Correct Answer: C
Rationale: Correct because CEA is the established tumor marker for colorectal cancer monitoring;
baseline and serial levels assess treatment response and detect recurrence, though it is not
recommended for screening asymptomatic populations.
Q7: A patient presents with pancytopenia, hypercellular bone marrow with dysplastic changes in
multiple cell lines, and 5% ringed sideroblasts. No Auer rods or increased blasts are identified.
Which diagnosis is most consistent?
A. Acute myeloid leukemia
B. Chronic lymphocytic leukemia
C. Myelodysplastic syndrome [CORRECT]
D. Aplastic anemia
Correct Answer: C
Rationale: Correct because myelodysplastic syndrome is characterized by peripheral cytopenias
despite hypercellular bone marrow, multilineage dysplasia, and ringed sideroblasts without meeting
criteria for acute leukemia.
Q8: In the pathogenesis of atherosclerosis, which cellular event represents the initial response to
endothelial dysfunction and lipid accumulation?
A. Smooth muscle cell proliferation and collagen deposition
B. Fibrous cap formation over a lipid core
C. Monocyte adhesion and transmigration into the intima [CORRECT]
D. Plaque rupture and thrombus formation
Correct Answer: C
Rationale: Correct because endothelial dysfunction promotes monocyte adhesion to the vascular
endothelium, followed by transmigration into the intima where they differentiate into macrophages
and engulf oxidized LDL, forming foam cells in the fatty streak lesion.
Q9: Which electrocardiographic finding is pathognomonic for atrial flutter?
A. Irregularly irregular rhythm with absent P waves
B. Prolonged PR interval with dropped beats
C. Sawtooth flutter waves at 250–350 bpm [CORRECT]
