Comprehensive Bank Exam | NSG 530 Exam 1, 2, 3 &
4 Advanced Pathophysiology Verified Questions
100% Correct Answers Rationales
INTRODUCTION
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Question 1
During a Type III hypersensitivity reaction, tissue damage is primarily mediated by
which mechanism?
A) Direct destruction of target cells by macrophages in the spleen
B) Release of histamine and leukotrienes by IgE-sensitized mast cells
C) Infiltration of neutrophils and release of lysosomal granules due to immune
complex deposition
D) T-cell mediated cytotoxicity destroying localized tissue structures
,VERIFIED ANSWER: C) Infiltration of neutrophils and release of lysosomal
granules due to immune complex deposition
EXPLANATION: Type III hypersensitivity reactions involve the formation of
antigen-antibody complexes that deposit in tissue w alls or blood vessels.
This deposition activates the complement cascade, attracting neutrophils.
The neutrophils attempt phagocytosis but fail, releasing toxic oxygen
products and lysosomal enzymes that cause local tissue destruction. Option
A defines Type II hypersensitivity, Option B defines Type I, and Option D
defines Type IV.
Question 2
A patient diagnosed with Hodgkin Lymphoma undergoes a lymph node biopsy.
Which distinct histopathological finding confirms this diagnosis?
A) Abundant blast cells presenting with a high mitotic index
B) Reed-Sternberg cells displaying a characteristic "owl-eye" appearance
C) Proliferation of small, atypical B-lymphocytes in the mantle zone
D) Bence-Jones proteins infiltrating the extracellular matrix
VERIFIED ANSWER: B) Reed-Sternberg cells displaying a characteristic "ow l-
eye" appearance
EXPLANATION: Reed-Sternberg cells are giant, multinucleated, malignant B-
lineage w hite blood cells necessary for confirming Hodgkin Lymphoma.
Option A is characteristic of acute leukemias, Option C describes Mantle Cell
Lymphoma, and Option D is found in Multiple Myeloma.
Question 3
,Which amino acid substitution is responsible for the structural alteration of
hemoglobin seen in Hb S (Sickle Cell Disease)?
A) Substitution of glutamic acid with valine on the beta-globin chain
B) Substitution of lysine with glutamic acid on the alpha-globin chain
C) Deletion of phenylalanine at position 508
D) Substitution of glycine with alanine on the gamma chain
VERIFIED ANSWER: A) Substitution of glutamic acid w ith valine on the beta-
globin chain
EXPLANATION: Sickle cell anemia (Hb S) is caused by a single-gene point
mutation w here valine replaces glutamic acid at the sixth position of the
beta-globin chain. This alters the shape of the hemoglobin molecule under
hypoxic conditions, causing polymerization and sickling of the erythrocyte.
Question 4
A patient presents with a prolonged history of poorly controlled hyperglycemia.
Pathophysiologically, how does high glucose cause long-term microvascular and
macrovascular tissue damage?
A) By inducing massive fluid shifts that directly cause endothelial cell lysis
B) Via the formation of Advanced Glycation End-products (AGEs) and activation of
Protein Kinase C (PKC)
C) By accelerating the destruction of erythropoietin in the renal tubules
D) Via sudden, catastrophic decreases in plasma oncotic pressure
VERIFIED ANSWER: B) Via the formation of Advanced Glycation End-products
(AGEs) and activation of Protein Kinase C (PKC)
EXPLANATION: Chronic high glucose levels lead to non-enzymatic glycation
of proteins, forming AGEs that bind to specific endothelial receptors. This,
, combined w ith glucose-mediated activation of PKC, triggers inflammation,
oxidative stress, and structural thickening of the basement membrane,
leading to systemic vascular complications.
Question 5
What is the primary vascular effect of histamine when it is released from mast
cells during an inflammatory or allergic reaction?
A) Immediate vasoconstriction of arterioles and systemic hypertension
B) Systemic vasodilation and increased endothelial capillary permeability
C) Enhanced platelet adhesion and initiation of the intrinsic clotting cascade
D) Suppression of leukocyte migration to the site of injury
VERIFIED ANSWER: B) Systemic vasodilation and increased endothelial
capillary permeability
EXPLANATION: Histamine acts on H1 receptors during an inflammatory event
to induce rapid vasodilation of local arterioles and increase capillary
endothelial permeability. This allow s plasma fluid and proteins to leak into
the interstitial space, producing the hallmark signs of sw elling (edema) and
redness (erythema).
Question 6
Which of the following clinical situations would directly precipitate an increase in
filtration from capillaries into the surrounding tissue spaces, resulting in
generalized edema?
A) Increased plasma oncotic pressure due to hyperalbuminemia
B) Decreased capillary hydrostatic pressure due to acute dehydration