MCA 1 CLINE EXAM 1 2026/2027 | Samuel Merritt University
Test #1 | Verified Solutions | Pass Guaranteed - A+ Graded
SECTION 1: Inflammation & Inflammatory Response (Q1-Q15)
Q1: Which vascular change occurs first during the acute inflammatory response?
A. Increased vascular permeability with protein leakage
B. Vasoconstriction of arterioles lasting 3-5 minutes
C. Chemotaxis of neutrophils to the injury site
D. Proliferation of fibroblasts and collagen deposition
B. Vasoconstriction of arterioles lasting 3-5 minutes [CORRECT]
Rationale: The vascular phase of acute inflammation begins with brief vasoconstriction
(3-5 minutes) followed by vasodilation and increased permeability. Option A occurs
after vasoconstriction, option C describes the cellular phase, and option D characterizes
chronic inflammation and tissue repair.
Correct Answer: B
Q2: A patient presents with a swollen, warm, red ankle after a sprain. Which chemical
mediator is primarily responsible for the increased vascular permeability and edema
formation?
A. Bradykinin
B. Histamine
C. Prostaglandin E2
D. Interleukin-1
B. Histamine [CORRECT]
,Rationale: Histamine, released from mast cells and basophils, causes vasodilation and
increases vascular permeability by contracting endothelial cells, producing the classic
signs of inflammation. Bradykinin also increases permeability but is secondary,
prostaglandin E2 mediates pain and fever, and interleukin-1 is a cytokine for systemic
responses.
Correct Answer: B
Q3: Which cell type is the first to arrive at the site of acute bacterial infection?
A. Macrophages
B. Neutrophils
C. Eosinophils
D. Lymphocytes
B. Neutrophils [CORRECT]
Rationale: Neutrophils are the first responders in acute inflammation, arriving within
minutes to hours via chemotaxis, and are the predominant cells in purulent exudate.
Macrophages arrive later (24-48 hours), eosinophils respond to parasites and allergies,
and lymphocytes dominate chronic inflammation.
Correct Answer: B
Q4: A patient with chronic rheumatoid arthritis develops joint deformity and loss of
function. Which characteristic distinguishes chronic from acute inflammation?
A. Predominance of neutrophils and fibrin deposition
B. Tissue destruction, fibrosis, and attempts at healing
C. Rapid onset with immediate vascular changes
D. Presence of serous exudate and minimal scarring
B. Tissue destruction, fibrosis, and attempts at healing [CORRECT]
,Rationale: Chronic inflammation is characterized by mononuclear cell infiltration, tissue
destruction, fibrosis, and attempts at repair. Option A describes acute inflammation,
option C describes the onset of acute inflammation, and option D describes mild acute
inflammation with serous exudate.
Correct Answer: B
Q5: Prostaglandins contribute to the inflammatory response by:
A. Activating the complement cascade directly
B. Mediating vasodilation, increased permeability, and pain sensitization
C. Stimulating B-cell antibody production
D. Causing immediate vasoconstriction of all blood vessels
B. Mediating vasodilation, increased permeability, and pain sensitization [CORRECT]
Rationale: Prostaglandins (particularly PGE2 and PGI2) enhance vasodilation, increase
vascular permeability, and sensitize pain receptors to bradykinin and histamine. Option
A describes complement proteins, option C describes cytokine-mediated B-cell
activation, and option D describes the opposite physiologic effect.
Correct Answer: B
Q6: A patient taking daily aspirin for cardiovascular protection asks how it helps with
inflammation. The nurse explains that aspirin primarily inhibits inflammation by:
A. Blocking histamine release from mast cells
B. Inhibiting cyclooxygenase (COX) enzyme activity
C. Preventing neutrophil chemotaxis to injury sites
D. Suppressing T-cell mediated immune responses
B. Inhibiting cyclooxygenase (COX) enzyme activity [CORRECT]
, Rationale: Aspirin irreversibly inhibits COX-1 and COX-2 enzymes, blocking the
conversion of arachidonic acid to prostaglandins and thromboxanes, thereby reducing
inflammation, pain, and fever. Option A describes antihistamine action, option C
describes corticosteroid effects, and option D describes immunosuppressant action.
Correct Answer: B
Q7: During the cellular phase of acute inflammation, which process describes the
movement of leukocytes through the blood vessel wall into tissues?
A. Diapedesis
B. Chemotaxis
C. Phagocytosis
D. Opsonization
A. Diapedesis [CORRECT]
Rationale: Diapedesis (transmigration) is the process by which leukocytes squeeze
between endothelial cells to exit the bloodstream into tissues. Chemotaxis is directional
movement toward chemical gradients, phagocytosis is engulfment of particles, and
opsonization is coating of pathogens for recognition.
Correct Answer: A
Q8: A patient has a wound with thick, yellow-green drainage. The nurse recognizes this
as purulent exudate, which indicates the presence of:
A. Serous fluid and minimal cellular debris
B. Neutrophils, necrotic tissue, and bacteria
C. Lymphocytes and plasma cells only
D. Eosinophils and fibrin without bacteria
B. Neutrophils, necrotic tissue, and bacteria [CORRECT]
Test #1 | Verified Solutions | Pass Guaranteed - A+ Graded
SECTION 1: Inflammation & Inflammatory Response (Q1-Q15)
Q1: Which vascular change occurs first during the acute inflammatory response?
A. Increased vascular permeability with protein leakage
B. Vasoconstriction of arterioles lasting 3-5 minutes
C. Chemotaxis of neutrophils to the injury site
D. Proliferation of fibroblasts and collagen deposition
B. Vasoconstriction of arterioles lasting 3-5 minutes [CORRECT]
Rationale: The vascular phase of acute inflammation begins with brief vasoconstriction
(3-5 minutes) followed by vasodilation and increased permeability. Option A occurs
after vasoconstriction, option C describes the cellular phase, and option D characterizes
chronic inflammation and tissue repair.
Correct Answer: B
Q2: A patient presents with a swollen, warm, red ankle after a sprain. Which chemical
mediator is primarily responsible for the increased vascular permeability and edema
formation?
A. Bradykinin
B. Histamine
C. Prostaglandin E2
D. Interleukin-1
B. Histamine [CORRECT]
,Rationale: Histamine, released from mast cells and basophils, causes vasodilation and
increases vascular permeability by contracting endothelial cells, producing the classic
signs of inflammation. Bradykinin also increases permeability but is secondary,
prostaglandin E2 mediates pain and fever, and interleukin-1 is a cytokine for systemic
responses.
Correct Answer: B
Q3: Which cell type is the first to arrive at the site of acute bacterial infection?
A. Macrophages
B. Neutrophils
C. Eosinophils
D. Lymphocytes
B. Neutrophils [CORRECT]
Rationale: Neutrophils are the first responders in acute inflammation, arriving within
minutes to hours via chemotaxis, and are the predominant cells in purulent exudate.
Macrophages arrive later (24-48 hours), eosinophils respond to parasites and allergies,
and lymphocytes dominate chronic inflammation.
Correct Answer: B
Q4: A patient with chronic rheumatoid arthritis develops joint deformity and loss of
function. Which characteristic distinguishes chronic from acute inflammation?
A. Predominance of neutrophils and fibrin deposition
B. Tissue destruction, fibrosis, and attempts at healing
C. Rapid onset with immediate vascular changes
D. Presence of serous exudate and minimal scarring
B. Tissue destruction, fibrosis, and attempts at healing [CORRECT]
,Rationale: Chronic inflammation is characterized by mononuclear cell infiltration, tissue
destruction, fibrosis, and attempts at repair. Option A describes acute inflammation,
option C describes the onset of acute inflammation, and option D describes mild acute
inflammation with serous exudate.
Correct Answer: B
Q5: Prostaglandins contribute to the inflammatory response by:
A. Activating the complement cascade directly
B. Mediating vasodilation, increased permeability, and pain sensitization
C. Stimulating B-cell antibody production
D. Causing immediate vasoconstriction of all blood vessels
B. Mediating vasodilation, increased permeability, and pain sensitization [CORRECT]
Rationale: Prostaglandins (particularly PGE2 and PGI2) enhance vasodilation, increase
vascular permeability, and sensitize pain receptors to bradykinin and histamine. Option
A describes complement proteins, option C describes cytokine-mediated B-cell
activation, and option D describes the opposite physiologic effect.
Correct Answer: B
Q6: A patient taking daily aspirin for cardiovascular protection asks how it helps with
inflammation. The nurse explains that aspirin primarily inhibits inflammation by:
A. Blocking histamine release from mast cells
B. Inhibiting cyclooxygenase (COX) enzyme activity
C. Preventing neutrophil chemotaxis to injury sites
D. Suppressing T-cell mediated immune responses
B. Inhibiting cyclooxygenase (COX) enzyme activity [CORRECT]
, Rationale: Aspirin irreversibly inhibits COX-1 and COX-2 enzymes, blocking the
conversion of arachidonic acid to prostaglandins and thromboxanes, thereby reducing
inflammation, pain, and fever. Option A describes antihistamine action, option C
describes corticosteroid effects, and option D describes immunosuppressant action.
Correct Answer: B
Q7: During the cellular phase of acute inflammation, which process describes the
movement of leukocytes through the blood vessel wall into tissues?
A. Diapedesis
B. Chemotaxis
C. Phagocytosis
D. Opsonization
A. Diapedesis [CORRECT]
Rationale: Diapedesis (transmigration) is the process by which leukocytes squeeze
between endothelial cells to exit the bloodstream into tissues. Chemotaxis is directional
movement toward chemical gradients, phagocytosis is engulfment of particles, and
opsonization is coating of pathogens for recognition.
Correct Answer: A
Q8: A patient has a wound with thick, yellow-green drainage. The nurse recognizes this
as purulent exudate, which indicates the presence of:
A. Serous fluid and minimal cellular debris
B. Neutrophils, necrotic tissue, and bacteria
C. Lymphocytes and plasma cells only
D. Eosinophils and fibrin without bacteria
B. Neutrophils, necrotic tissue, and bacteria [CORRECT]
