NURS 611 EXAM 3 ADVANCED PATHOPHYSIOLOGY
(MARYVILLE UNIVERSITY) NEWEST 2025 COMPLETE 200
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+
SECTION 1: HEMATOLOGY
1. Question: What is the primary cause of hyperglycemia in Type 1 diabetes
mellitus?
• Answer: Autoimmune destruction of pancreatic beta cells, leading to an
absolute deficiency of insulin, which prevents glucose uptake by cells and
results in elevated blood glucose levels.
• Rationale: Type 1 DM is an autoimmune condition where the immune
system attacks insulin-producing cells, unlike Type 2 DM, which involves
insulin resistance and relative insulin deficiency.
2. Question: A patient with Cushing's syndrome presents with buffalo hump,
moon face, and abdominal striae. What is the underlying cause of these clinical
manifestations?
• Answer: Excessive cortisol production, often due to an adrenal tumor or
pituitary adenoma causing hypersecretion of ACTH.
• Rationale: Cortisol excess leads to fat redistribution (central obesity, buffalo
hump), skin thinning (striae), and protein catabolism.
3. Question: What is the primary function of red blood cells (RBCs) in
hematopoiesis?
, • Answer: Tissue oxygenation, facilitated by hemoglobin binding and
transporting oxygen to tissues.
• Rationale: RBCs' biconcave shape and flexibility allow efficient oxygen
delivery, critical for cellular metabolism.
4. Question: A patient with varicose veins complains of leg swelling and pain.
What is the primary pathophysiological mechanism?
• Answer: Pooling of blood in superficial veins (e.g., saphenous veins) due
to venous insufficiency, leading to distension and inflammation.
• Rationale: Weakened vein walls or incompetent valves cause blood to
accumulate, increasing venous pressure and causing symptoms.
5. Question: Why do some cancer patients develop hypercalcemia without bone
metastases?
• Answer: Paraneoplastic syndromes, where tumors secrete parathyroid
hormone-related protein (PTHrP) or other factors that increase serum
calcium levels.
• Rationale: PTHrP mimics PTH, promoting bone resorption and renal calcium
reabsorption, leading to hypercalcemia.
6. Question: A patient with iron deficiency anemia is expected to have which
laboratory finding?
• Answer: Low serum ferritin, low serum iron, high total iron-binding
capacity (TIBC), and microcytic hypochromic RBCs on peripheral smear.
• Rationale: Iron deficiency depletes iron stores (low ferritin), reduces
circulating iron, and increases transferrin (TIBC) to maximize iron binding.
,7. Question: What is the most common cause of vitamin B12 deficiency leading to
pernicious anemia?
• Answer: Lack of intrinsic factor due to autoimmune destruction of gastric
parietal cells.
• Rationale: Intrinsic factor is required for ileal absorption of vitamin B12.
Autoimmune gastritis causes atrophy of parietal cells, leading to B12
deficiency and megaloblastic anemia.
8. Question: In sickle cell anemia, the genetic mutation results in which specific
amino acid substitution?
• Answer: Valine replaces glutamic acid at the sixth position of the beta-
globin chain.
• Rationale: This substitution causes hemoglobin S to polymerize under low
oxygen conditions, leading to RBC sickling and vaso-occlusion.
9. Question: A patient with hemophilia A has a deficiency of which clotting factor?
• Answer: Factor VIII.
• Rationale: Hemophilia A is an X-linked recessive disorder causing factor VIII
deficiency, leading to prolonged bleeding time and hemarthrosis.
10. Question: What is the primary pathophysiological mechanism of disseminated
intravascular coagulation (DIC)?
• Answer: Widespread activation of coagulation cascade with microthrombi
formation, followed by consumption of platelets and clotting factors,
leading to bleeding.
• Rationale: DIC is triggered by sepsis, trauma, or malignancy, causing
systemic thrombosis and subsequent hemorrhage.
, 11. Question: Which laboratory finding is characteristic of immune
thrombocytopenic purpura (ITP)?
• Answer: Isolated thrombocytopenia with normal or increased
megakaryocytes in bone marrow and antiplatelet antibodies.
• Rationale: ITP is an autoimmune disorder where antibodies target platelets
for destruction in the spleen, with preserved bone marrow production.
12. Question: A patient with chronic lymphocytic leukemia (CLL) typically presents
with which finding?
• Answer: Lymphocytosis (often >10,000/μL), lymphadenopathy, and
autoimmune hemolytic anemia.
• Rationale: CLL is the most common adult leukemia, characterized by clonal
proliferation of mature B lymphocytes that are immunoincompetent.
13. Question: What is the diagnostic hallmark of polycythemia vera (PV)?
• Answer: JAK2 V617F mutation (present in >95% of patients), along with
increased RBC mass, leukocytosis, and thrombocytosis.
• Rationale: PV is a myeloproliferative neoplasm with overproduction of RBCs
due to activating JAK2 mutation.
14. Question: A patient with heparin-induced thrombocytopenia (HIT) is at risk for
which complication?
• Answer: Arterial and venous thrombosis (paradoxical thrombotic
complications despite low platelets).
• Rationale: HIT causes antibody-mediated platelet activation, leading to
thrombosis even with thrombocytopenia.
15. Question: What is the primary function of erythropoietin (EPO)?
(MARYVILLE UNIVERSITY) NEWEST 2025 COMPLETE 200
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+
SECTION 1: HEMATOLOGY
1. Question: What is the primary cause of hyperglycemia in Type 1 diabetes
mellitus?
• Answer: Autoimmune destruction of pancreatic beta cells, leading to an
absolute deficiency of insulin, which prevents glucose uptake by cells and
results in elevated blood glucose levels.
• Rationale: Type 1 DM is an autoimmune condition where the immune
system attacks insulin-producing cells, unlike Type 2 DM, which involves
insulin resistance and relative insulin deficiency.
2. Question: A patient with Cushing's syndrome presents with buffalo hump,
moon face, and abdominal striae. What is the underlying cause of these clinical
manifestations?
• Answer: Excessive cortisol production, often due to an adrenal tumor or
pituitary adenoma causing hypersecretion of ACTH.
• Rationale: Cortisol excess leads to fat redistribution (central obesity, buffalo
hump), skin thinning (striae), and protein catabolism.
3. Question: What is the primary function of red blood cells (RBCs) in
hematopoiesis?
, • Answer: Tissue oxygenation, facilitated by hemoglobin binding and
transporting oxygen to tissues.
• Rationale: RBCs' biconcave shape and flexibility allow efficient oxygen
delivery, critical for cellular metabolism.
4. Question: A patient with varicose veins complains of leg swelling and pain.
What is the primary pathophysiological mechanism?
• Answer: Pooling of blood in superficial veins (e.g., saphenous veins) due
to venous insufficiency, leading to distension and inflammation.
• Rationale: Weakened vein walls or incompetent valves cause blood to
accumulate, increasing venous pressure and causing symptoms.
5. Question: Why do some cancer patients develop hypercalcemia without bone
metastases?
• Answer: Paraneoplastic syndromes, where tumors secrete parathyroid
hormone-related protein (PTHrP) or other factors that increase serum
calcium levels.
• Rationale: PTHrP mimics PTH, promoting bone resorption and renal calcium
reabsorption, leading to hypercalcemia.
6. Question: A patient with iron deficiency anemia is expected to have which
laboratory finding?
• Answer: Low serum ferritin, low serum iron, high total iron-binding
capacity (TIBC), and microcytic hypochromic RBCs on peripheral smear.
• Rationale: Iron deficiency depletes iron stores (low ferritin), reduces
circulating iron, and increases transferrin (TIBC) to maximize iron binding.
,7. Question: What is the most common cause of vitamin B12 deficiency leading to
pernicious anemia?
• Answer: Lack of intrinsic factor due to autoimmune destruction of gastric
parietal cells.
• Rationale: Intrinsic factor is required for ileal absorption of vitamin B12.
Autoimmune gastritis causes atrophy of parietal cells, leading to B12
deficiency and megaloblastic anemia.
8. Question: In sickle cell anemia, the genetic mutation results in which specific
amino acid substitution?
• Answer: Valine replaces glutamic acid at the sixth position of the beta-
globin chain.
• Rationale: This substitution causes hemoglobin S to polymerize under low
oxygen conditions, leading to RBC sickling and vaso-occlusion.
9. Question: A patient with hemophilia A has a deficiency of which clotting factor?
• Answer: Factor VIII.
• Rationale: Hemophilia A is an X-linked recessive disorder causing factor VIII
deficiency, leading to prolonged bleeding time and hemarthrosis.
10. Question: What is the primary pathophysiological mechanism of disseminated
intravascular coagulation (DIC)?
• Answer: Widespread activation of coagulation cascade with microthrombi
formation, followed by consumption of platelets and clotting factors,
leading to bleeding.
• Rationale: DIC is triggered by sepsis, trauma, or malignancy, causing
systemic thrombosis and subsequent hemorrhage.
, 11. Question: Which laboratory finding is characteristic of immune
thrombocytopenic purpura (ITP)?
• Answer: Isolated thrombocytopenia with normal or increased
megakaryocytes in bone marrow and antiplatelet antibodies.
• Rationale: ITP is an autoimmune disorder where antibodies target platelets
for destruction in the spleen, with preserved bone marrow production.
12. Question: A patient with chronic lymphocytic leukemia (CLL) typically presents
with which finding?
• Answer: Lymphocytosis (often >10,000/μL), lymphadenopathy, and
autoimmune hemolytic anemia.
• Rationale: CLL is the most common adult leukemia, characterized by clonal
proliferation of mature B lymphocytes that are immunoincompetent.
13. Question: What is the diagnostic hallmark of polycythemia vera (PV)?
• Answer: JAK2 V617F mutation (present in >95% of patients), along with
increased RBC mass, leukocytosis, and thrombocytosis.
• Rationale: PV is a myeloproliferative neoplasm with overproduction of RBCs
due to activating JAK2 mutation.
14. Question: A patient with heparin-induced thrombocytopenia (HIT) is at risk for
which complication?
• Answer: Arterial and venous thrombosis (paradoxical thrombotic
complications despite low platelets).
• Rationale: HIT causes antibody-mediated platelet activation, leading to
thrombosis even with thrombocytopenia.
15. Question: What is the primary function of erythropoietin (EPO)?
