NR507 Advanced Pathophysiology
Midterm 1-100 Examplify Online
Proctored Exam Newest 2025/2026
Complete Actual Screenshot Exam
CHAMBERLAIN UNIVERSITY COLLEGE
OF NURSING
1. A patient with septic shock develops generalized endothelial injury,
hypotension, elevated lactate, and prolonged prothrombin and partial
thromboplastin times. Laboratory results show thrombocytopenia, elevated
D-dimer, and decreased fibrinogen. Which pathophysiologic process best
explains these findings?
a. Isolated platelet destruction caused by splenic sequestration
b. Disseminated intravascular coagulation with simultaneous thrombosis and
consumption of clotting factors
c. Vitamin K deficiency causing isolated impairment of the extrinsic pathway
d. Hemolytic anemia caused by antibody-mediated erythrocyte destruction
ANS: B
,EXPERT RATIONALE: Disseminated intravascular coagulation is an acquired
syndrome in which widespread activation of coagulation produces microvascular
thrombi and consumes platelets and clotting factors. As coagulation factors and
platelets are consumed, the patient develops bleeding, prolonged PT and PTT,
elevated D-dimer from fibrin breakdown, low fibrinogen, and thrombocytopenia.
Sepsis is a common trigger because inflammatory cytokines and tissue-factor
expression activate coagulation and impair anticoagulant pathways. Option A is
incorrect because isolated platelet destruction would cause thrombocytopenia
but would not typically cause markedly prolonged PT, PTT, elevated D-dimer, and
low fibrinogen. Option C is incorrect because vitamin K deficiency primarily
prolongs PT initially and does not explain the markedly elevated D-dimer and
consumptive process. Option D is incorrect because hemolysis may coexist with
severe illness but does not produce the characteristic consumptive coagulopathy
described.
2. A patient develops wheezing, hypotension, generalized urticaria, and facial
edema within minutes of receiving an intravenous medication. Which
mechanism is primarily responsible for this reaction?
a. IgG-mediated activation of complement against circulating erythrocytes
b. IgE-mediated mast-cell degranulation with release of histamine and other
mediators
c. T-cell-mediated delayed cytotoxicity occurring over 48 to 72 hours
d. Immune-complex deposition in small blood vessels
ANS: B
EXPERT RATIONALE: The rapid onset of wheezing, hypotension, urticaria, and
angioedema is characteristic of a type I immediate hypersensitivity reaction. The
allergen cross-links antigen-specific IgE antibodies bound to mast cells and
basophils, causing degranulation and release of histamine, leukotrienes,
prostaglandins, and other mediators. These substances produce
bronchoconstriction, vasodilation, increased vascular permeability, and tissue
edema. Option A describes an IgG-mediated cytotoxic reaction, such as a
transfusion reaction. Option C describes a type IV delayed hypersensitivity
,reaction mediated by T cells. Option D describes a type III immune-complex
reaction, which generally develops over hours to days and may cause vasculitis or
tissue injury. The immediate life-threatening physiology in this patient is
anaphylaxis.
3. A patient with systemic lupus erythematosus develops fatigue, arthralgia,
photosensitive rash, proteinuria, and hematuria. Which immunologic
process best explains the renal injury?
a. Direct IgE-mediated mast-cell activation in the glomerulus
b. Deposition of circulating antigen-antibody complexes with complement
activation
c. Antibody-mediated stimulation of thyroid receptors
d. T-cell destruction of pancreatic beta cells
ANS: B
EXPERT RATIONALE: Systemic lupus erythematosus is primarily a type III
hypersensitivity disorder involving formation and deposition of circulating
immune complexes. These complexes activate complement and recruit
inflammatory cells, causing tissue injury in organs such as the skin, joints, kidneys,
blood vessels, and central nervous system. Glomerular immune-complex
deposition produces inflammation, altered filtration, proteinuria, and hematuria.
Option A is incorrect because IgE-mediated mast-cell activation causes immediate
allergic reactions rather than lupus nephritis. Option C describes the mechanism
of Graves disease. Option D describes a mechanism involved in type 1 diabetes
mellitus. The renal findings in this patient are most consistent with immune-
complex glomerular injury.
4. A patient with a severe bacterial infection has a temperature of 40°C,
tachycardia, hypotension, and altered mental status. Which mediator is
most directly associated with hypothalamic elevation of the temperature
set point?
a. Histamine
b. Interleukin-1
, c. Immunoglobulin A
d. Bradykinin
ANS: B
EXPERT RATIONALE: Interleukin-1 is an endogenous pyrogen released by activated
macrophages and other immune cells. It promotes prostaglandin E2 production in
the hypothalamus, raising the thermoregulatory set point and producing fever.
Tumor necrosis factor and interleukin-6 also contribute to systemic inflammatory
responses. Option A, histamine, contributes primarily to vasodilation, increased
vascular permeability, bronchoconstriction, and pruritus. Option C is an antibody
involved in mucosal immunity and does not regulate the hypothalamic
temperature set point. Option D, bradykinin, contributes to pain, vasodilation, and
vascular permeability but is not the primary endogenous pyrogen responsible for
fever.
5. A patient with a localized bacterial wound infection has erythema, warmth,
edema, and tenderness surrounding the wound. Which vascular change
occurs earliest in the inflammatory response?
a. Immediate sustained vasoconstriction followed by permanent ischemia
b. Brief vasoconstriction followed by arteriolar vasodilation and increased vascular
permeability
c. Venous thrombosis caused by platelet aggregation
d. Generalized arterial vasoconstriction caused by catecholamine release
ANS: B
EXPERT RATIONALE: Acute inflammation begins with a brief transient
vasoconstriction followed by arteriolar vasodilation. Increased blood flow
produces warmth and erythema. Endothelial contraction and injury increase
vascular permeability, allowing protein-rich fluid to move into the interstitial space
and cause edema. Slowing of blood flow promotes leukocyte margination and
migration into tissues. Option A is incorrect because inflammation does not
normally produce permanent ischemia. Option C is not the initiating vascular
Midterm 1-100 Examplify Online
Proctored Exam Newest 2025/2026
Complete Actual Screenshot Exam
CHAMBERLAIN UNIVERSITY COLLEGE
OF NURSING
1. A patient with septic shock develops generalized endothelial injury,
hypotension, elevated lactate, and prolonged prothrombin and partial
thromboplastin times. Laboratory results show thrombocytopenia, elevated
D-dimer, and decreased fibrinogen. Which pathophysiologic process best
explains these findings?
a. Isolated platelet destruction caused by splenic sequestration
b. Disseminated intravascular coagulation with simultaneous thrombosis and
consumption of clotting factors
c. Vitamin K deficiency causing isolated impairment of the extrinsic pathway
d. Hemolytic anemia caused by antibody-mediated erythrocyte destruction
ANS: B
,EXPERT RATIONALE: Disseminated intravascular coagulation is an acquired
syndrome in which widespread activation of coagulation produces microvascular
thrombi and consumes platelets and clotting factors. As coagulation factors and
platelets are consumed, the patient develops bleeding, prolonged PT and PTT,
elevated D-dimer from fibrin breakdown, low fibrinogen, and thrombocytopenia.
Sepsis is a common trigger because inflammatory cytokines and tissue-factor
expression activate coagulation and impair anticoagulant pathways. Option A is
incorrect because isolated platelet destruction would cause thrombocytopenia
but would not typically cause markedly prolonged PT, PTT, elevated D-dimer, and
low fibrinogen. Option C is incorrect because vitamin K deficiency primarily
prolongs PT initially and does not explain the markedly elevated D-dimer and
consumptive process. Option D is incorrect because hemolysis may coexist with
severe illness but does not produce the characteristic consumptive coagulopathy
described.
2. A patient develops wheezing, hypotension, generalized urticaria, and facial
edema within minutes of receiving an intravenous medication. Which
mechanism is primarily responsible for this reaction?
a. IgG-mediated activation of complement against circulating erythrocytes
b. IgE-mediated mast-cell degranulation with release of histamine and other
mediators
c. T-cell-mediated delayed cytotoxicity occurring over 48 to 72 hours
d. Immune-complex deposition in small blood vessels
ANS: B
EXPERT RATIONALE: The rapid onset of wheezing, hypotension, urticaria, and
angioedema is characteristic of a type I immediate hypersensitivity reaction. The
allergen cross-links antigen-specific IgE antibodies bound to mast cells and
basophils, causing degranulation and release of histamine, leukotrienes,
prostaglandins, and other mediators. These substances produce
bronchoconstriction, vasodilation, increased vascular permeability, and tissue
edema. Option A describes an IgG-mediated cytotoxic reaction, such as a
transfusion reaction. Option C describes a type IV delayed hypersensitivity
,reaction mediated by T cells. Option D describes a type III immune-complex
reaction, which generally develops over hours to days and may cause vasculitis or
tissue injury. The immediate life-threatening physiology in this patient is
anaphylaxis.
3. A patient with systemic lupus erythematosus develops fatigue, arthralgia,
photosensitive rash, proteinuria, and hematuria. Which immunologic
process best explains the renal injury?
a. Direct IgE-mediated mast-cell activation in the glomerulus
b. Deposition of circulating antigen-antibody complexes with complement
activation
c. Antibody-mediated stimulation of thyroid receptors
d. T-cell destruction of pancreatic beta cells
ANS: B
EXPERT RATIONALE: Systemic lupus erythematosus is primarily a type III
hypersensitivity disorder involving formation and deposition of circulating
immune complexes. These complexes activate complement and recruit
inflammatory cells, causing tissue injury in organs such as the skin, joints, kidneys,
blood vessels, and central nervous system. Glomerular immune-complex
deposition produces inflammation, altered filtration, proteinuria, and hematuria.
Option A is incorrect because IgE-mediated mast-cell activation causes immediate
allergic reactions rather than lupus nephritis. Option C describes the mechanism
of Graves disease. Option D describes a mechanism involved in type 1 diabetes
mellitus. The renal findings in this patient are most consistent with immune-
complex glomerular injury.
4. A patient with a severe bacterial infection has a temperature of 40°C,
tachycardia, hypotension, and altered mental status. Which mediator is
most directly associated with hypothalamic elevation of the temperature
set point?
a. Histamine
b. Interleukin-1
, c. Immunoglobulin A
d. Bradykinin
ANS: B
EXPERT RATIONALE: Interleukin-1 is an endogenous pyrogen released by activated
macrophages and other immune cells. It promotes prostaglandin E2 production in
the hypothalamus, raising the thermoregulatory set point and producing fever.
Tumor necrosis factor and interleukin-6 also contribute to systemic inflammatory
responses. Option A, histamine, contributes primarily to vasodilation, increased
vascular permeability, bronchoconstriction, and pruritus. Option C is an antibody
involved in mucosal immunity and does not regulate the hypothalamic
temperature set point. Option D, bradykinin, contributes to pain, vasodilation, and
vascular permeability but is not the primary endogenous pyrogen responsible for
fever.
5. A patient with a localized bacterial wound infection has erythema, warmth,
edema, and tenderness surrounding the wound. Which vascular change
occurs earliest in the inflammatory response?
a. Immediate sustained vasoconstriction followed by permanent ischemia
b. Brief vasoconstriction followed by arteriolar vasodilation and increased vascular
permeability
c. Venous thrombosis caused by platelet aggregation
d. Generalized arterial vasoconstriction caused by catecholamine release
ANS: B
EXPERT RATIONALE: Acute inflammation begins with a brief transient
vasoconstriction followed by arteriolar vasodilation. Increased blood flow
produces warmth and erythema. Endothelial contraction and injury increase
vascular permeability, allowing protein-rich fluid to move into the interstitial space
and cause edema. Slowing of blood flow promotes leukocyte margination and
migration into tissues. Option A is incorrect because inflammation does not
normally produce permanent ischemia. Option C is not the initiating vascular
