WGU D115/ WGUD115 OA PREP TEST BANK (LATEST 2025/2026)
ADVANCED PATHOPHYSIOLOGY WITH 400 REAL EXAM QUESTIONS
AND CORRECT
## PART 1: DEFENSE MECHANISMS & IMMUNITY
### Question 1
What are the three layers of human defense, and what happens during each?
A. Innate, adaptive, and passive immunity
B. Physical, mechanical, and biochemical barriers
C. Cellular, humoral, and complement
D. Primary, secondary, and tertiary defenses
**Answer: B. Physical, mechanical, and biochemical barriers**
**Rationale:** The three layers of human defense are:
- **Physical:** Tightly associated epithelial cells protecting against damage and infection (skin,
membranous sheets lining GI, GU, and respiratory tracts)
- **Mechanical:** "Washing" surfaces (sloughing dead skin, vomiting, urination, coughing)
- **Biochemical barriers:** Substances that trap or destroy microorganisms (mucus, sweat, saliva, tears,
sebaceous glands, earwax)
---
### Question 2
The inflammatory response is best described as:
A. A slow, specific response that occurs only in the brain
B. A rapid and nonspecific protective response to cellular injury that occurs only in vascularized tissue
,C. A response that only occurs in response to bacterial infection
D. A process that requires prior exposure to an antigen
**Answer: B. A rapid and nonspecific protective response to cellular injury that occurs only in
vascularized tissue**
**Rationale:** The inflammatory response is the **second line of defense**. It is rapid and
nonspecific, occurring in response to cellular injury from any cause. It can only occur in vascularized
tissue, which is why avascular structures like the cornea have limited inflammatory capacity.
---
### Question 3
How do acute and chronic inflammation differ?
A. Acute inflammation lasts 2 weeks or longer; chronic inflammation lasts 8-10 days
B. Acute inflammation lasts 8-10 days; chronic inflammation can last 2 weeks or longer
C. Both acute and chronic inflammation have the same duration
D. Acute inflammation occurs only in children; chronic inflammation occurs only in adults
**Answer: B. Acute inflammation lasts 8-10 days; chronic inflammation can last 2 weeks or longer**
**Rationale:** Acute inflammation has a short duration—8-10 days from onset to healing. The
three systemic changes associated with the acute inflammatory response are fever, leukocytosis, and
plasma protein synthesis. Chronic inflammation can be a continuation of acute inflammation that lasts 2
weeks or longer, or it can occur as a distinct process without much preceding acute inflammation.
---
### Question 4
What are the three phases of wound healing, and what occurs during each?
, A. Infection, proliferation, and resolution
B. Vasoconstriction, clot formation, and scarring
C. Inflammation, proliferation and new tissue formation, and remodeling and maturation
D. Acute, chronic, and resolution
**Answer: C. Inflammation, proliferation and new tissue formation, and remodeling and maturation**
**Rationale:** The three phases of wound healing are:
- **Phase 1 (Inflammation):** Includes coagulation and infiltration of platelets, neutrophils, and
macrophages
- **Phase 2 (Proliferation and New Tissue Formation):** Wound begins to heal; begins 3-4 days after
injury, continues up to 2 weeks
- **Phase 3 (Remodeling and Maturation):** Phase for recovering normal tissue structure that can
persist for years
---
### Question 5
How does the inflammatory response differ in neonates?
A. Neonates have a heightened inflammatory response
B. Neonates often have transiently depressed inflammatory function, particularly neutrophil chemotaxis
and alternative complement activity
C. Neonates have no inflammatory response
D. Neonates have the same inflammatory response as adults
**Answer: B. Neonates often have transiently depressed inflammatory function, particularly neutrophil
chemotaxis and alternative complement activity**
ADVANCED PATHOPHYSIOLOGY WITH 400 REAL EXAM QUESTIONS
AND CORRECT
## PART 1: DEFENSE MECHANISMS & IMMUNITY
### Question 1
What are the three layers of human defense, and what happens during each?
A. Innate, adaptive, and passive immunity
B. Physical, mechanical, and biochemical barriers
C. Cellular, humoral, and complement
D. Primary, secondary, and tertiary defenses
**Answer: B. Physical, mechanical, and biochemical barriers**
**Rationale:** The three layers of human defense are:
- **Physical:** Tightly associated epithelial cells protecting against damage and infection (skin,
membranous sheets lining GI, GU, and respiratory tracts)
- **Mechanical:** "Washing" surfaces (sloughing dead skin, vomiting, urination, coughing)
- **Biochemical barriers:** Substances that trap or destroy microorganisms (mucus, sweat, saliva, tears,
sebaceous glands, earwax)
---
### Question 2
The inflammatory response is best described as:
A. A slow, specific response that occurs only in the brain
B. A rapid and nonspecific protective response to cellular injury that occurs only in vascularized tissue
,C. A response that only occurs in response to bacterial infection
D. A process that requires prior exposure to an antigen
**Answer: B. A rapid and nonspecific protective response to cellular injury that occurs only in
vascularized tissue**
**Rationale:** The inflammatory response is the **second line of defense**. It is rapid and
nonspecific, occurring in response to cellular injury from any cause. It can only occur in vascularized
tissue, which is why avascular structures like the cornea have limited inflammatory capacity.
---
### Question 3
How do acute and chronic inflammation differ?
A. Acute inflammation lasts 2 weeks or longer; chronic inflammation lasts 8-10 days
B. Acute inflammation lasts 8-10 days; chronic inflammation can last 2 weeks or longer
C. Both acute and chronic inflammation have the same duration
D. Acute inflammation occurs only in children; chronic inflammation occurs only in adults
**Answer: B. Acute inflammation lasts 8-10 days; chronic inflammation can last 2 weeks or longer**
**Rationale:** Acute inflammation has a short duration—8-10 days from onset to healing. The
three systemic changes associated with the acute inflammatory response are fever, leukocytosis, and
plasma protein synthesis. Chronic inflammation can be a continuation of acute inflammation that lasts 2
weeks or longer, or it can occur as a distinct process without much preceding acute inflammation.
---
### Question 4
What are the three phases of wound healing, and what occurs during each?
, A. Infection, proliferation, and resolution
B. Vasoconstriction, clot formation, and scarring
C. Inflammation, proliferation and new tissue formation, and remodeling and maturation
D. Acute, chronic, and resolution
**Answer: C. Inflammation, proliferation and new tissue formation, and remodeling and maturation**
**Rationale:** The three phases of wound healing are:
- **Phase 1 (Inflammation):** Includes coagulation and infiltration of platelets, neutrophils, and
macrophages
- **Phase 2 (Proliferation and New Tissue Formation):** Wound begins to heal; begins 3-4 days after
injury, continues up to 2 weeks
- **Phase 3 (Remodeling and Maturation):** Phase for recovering normal tissue structure that can
persist for years
---
### Question 5
How does the inflammatory response differ in neonates?
A. Neonates have a heightened inflammatory response
B. Neonates often have transiently depressed inflammatory function, particularly neutrophil chemotaxis
and alternative complement activity
C. Neonates have no inflammatory response
D. Neonates have the same inflammatory response as adults
**Answer: B. Neonates often have transiently depressed inflammatory function, particularly neutrophil
chemotaxis and alternative complement activity**
