WGU PATHOPHYSIOLOGY D236 OA REVIEW: 2026 DISEASE PROCESSES & S… EXAM
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
WGU Pathophysiology
D236 OA Review: 2026
Disease Processes &
Systems Q&A
Verified Answers Exam Ready With Rationales
150 QUESTIONS
DOCUMENT OVERVIEW
This document provides 150 verified questions with detailed rationales covering core
pathophysiology concepts. Each question is paired with its correct answer and a comprehensive
explanation of the underlying disease processes and systems. This resource is ideal for
comprehensive study, quick review of key areas, and preparation for certification exams.
CONTENTS
01 Homeostasis & Body Defenses Q1–Q9
02 Congenital & Genetic Disorders Q10–Q17
03 Cardiovascular & Respiratory Disorders Q18–Q38
04 Metabolic & Endocrine Disorders Q39–Q55
Page 1
, 05 Fluid & Electrolyte Balance Q56–Q61
06 Infectious & Inflammatory Diseases Q62–Q84
07 Neurological & Musculoskeletal Disorders Q85–Q107
08 Integumentary & Renal Disorders Q108–Q147
09 Additional Questions Q148–Q150
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 150
Describe how your body responds to an infection.
CORRECT ANSWER
T cells produce cytokines, which stimulate B cells. B cells produce antibodies.
RATIONALE
The adaptive immune response involves T helper cells releasing cytokines that activate B lymphocytes,
prompting them to differentiate into plasma cells that secrete antigen-specific antibodies for pathogen
neutralization. This orchestrated cellular and humoral immunity is central to eradicating extracellular
infections.
Q2 QUESTION 2 OF 150
Describes factors that disrupt homeostasis and how disruptions affect wellbeing.
CORRECT ANSWER
(ex) Fluid and electrolyte shifts can cause n/v or dysrhythmias.
RATIONALE
Fluid and electrolyte imbalances directly impair cellular function and organ system coordination, leading to
symptoms like nausea, vomiting, or cardiac dysrhythmias as the body struggles to maintain equilibrium. This
demonstrates how disruptions in fluid and electrolyte balance compromise homeostasis and well-being.
Page 2
, Q3 QUESTION 3 OF 150
CD4 cells
CORRECT ANSWER
Helper T cells that mature in thymus that active B cells to create immunity
RATIONALE
CD4 cells, or helper T cells, mature in the thymus and are critical for adaptive immunity by activating B cells to
produce antibodies. This interaction orchestrates the humoral immune response against specific pathogens.
Q4 QUESTION 4 OF 150
Why is it important to maintain a homeostatic balance of glucose in the blood?
CORRECT ANSWER
glucose is used for energy and is not synthesized by the brain, so it is needed to maintain brain/motor
functions
RATIONALE
Maintaining blood glucose homeostasis is critical because the brain is obligate glucose-dependent, relying on
a constant supply for energy to sustain neurological and motor functions. This reliance stems from the brain's
limited capacity for glucose synthesis and storage, necessitating continuous external provision.
Q5 QUESTION 5 OF 150
Differentiate between Innate Immunity and Adaptive Immunity
CORRECT ANSWER
Innate immunity is the body's first line of defense against pathogens. It is general and non-specific, which
means it does not differentiate between types of pathogens. Adaptive immunity is a type of immunity that
is built up as we are exposed to diseases or get vaccinated.
Page 3
, RATIONALE
Innate immunity provides immediate, non-specific defense through physical barriers and phagocytic cells,
whereas adaptive immunity develops slower but offers highly specific, memory-based protection against
particular antigens. This distinction highlights the tiered and specialized nature of the immune system's
response to foreign invaders.
Q6 QUESTION 6 OF 150
Describe how and why our injury response results in the signs of redness, swelling, heat, and pain? Be
sure to use chemokines, histamine, and vasodilation in your response.
CORRECT ANSWER
Our body first releases cytokines which produce inflammatory cells or chemokines directly to the
affected area to stimulate healing. Vasodilation occurs simultaneously to facilitate quicker and easier
movement of inflammatory cells to the area.
RATIONALE
Inflammatory mediators like cytokines and histamine are released, causing vasodilation and increased vascular
permeability, which recruits leukocytes and plasma proteins to the site of injury, producing redness, swelling,
heat, and pain. This coordinated cellular and vascular response, driven by chemokines, initiates tissue repair
and pathogen clearance.
Q7 QUESTION 7 OF 150
What is lymph
CORRECT ANSWER
fluid that flows in lymphatic system to return fluid from tissues into circulation
RATIONALE
Lymph is interstitial fluid that has entered lymphatic vessels, carrying proteins and other substances from
tissues back into the bloodstream to maintain fluid balance. This process is critical for immune surveillance
and the removal of waste products from the interstitial space.
Q8 QUESTION 8 OF 150
Page 4
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
WGU Pathophysiology
D236 OA Review: 2026
Disease Processes &
Systems Q&A
Verified Answers Exam Ready With Rationales
150 QUESTIONS
DOCUMENT OVERVIEW
This document provides 150 verified questions with detailed rationales covering core
pathophysiology concepts. Each question is paired with its correct answer and a comprehensive
explanation of the underlying disease processes and systems. This resource is ideal for
comprehensive study, quick review of key areas, and preparation for certification exams.
CONTENTS
01 Homeostasis & Body Defenses Q1–Q9
02 Congenital & Genetic Disorders Q10–Q17
03 Cardiovascular & Respiratory Disorders Q18–Q38
04 Metabolic & Endocrine Disorders Q39–Q55
Page 1
, 05 Fluid & Electrolyte Balance Q56–Q61
06 Infectious & Inflammatory Diseases Q62–Q84
07 Neurological & Musculoskeletal Disorders Q85–Q107
08 Integumentary & Renal Disorders Q108–Q147
09 Additional Questions Q148–Q150
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 150
Describe how your body responds to an infection.
CORRECT ANSWER
T cells produce cytokines, which stimulate B cells. B cells produce antibodies.
RATIONALE
The adaptive immune response involves T helper cells releasing cytokines that activate B lymphocytes,
prompting them to differentiate into plasma cells that secrete antigen-specific antibodies for pathogen
neutralization. This orchestrated cellular and humoral immunity is central to eradicating extracellular
infections.
Q2 QUESTION 2 OF 150
Describes factors that disrupt homeostasis and how disruptions affect wellbeing.
CORRECT ANSWER
(ex) Fluid and electrolyte shifts can cause n/v or dysrhythmias.
RATIONALE
Fluid and electrolyte imbalances directly impair cellular function and organ system coordination, leading to
symptoms like nausea, vomiting, or cardiac dysrhythmias as the body struggles to maintain equilibrium. This
demonstrates how disruptions in fluid and electrolyte balance compromise homeostasis and well-being.
Page 2
, Q3 QUESTION 3 OF 150
CD4 cells
CORRECT ANSWER
Helper T cells that mature in thymus that active B cells to create immunity
RATIONALE
CD4 cells, or helper T cells, mature in the thymus and are critical for adaptive immunity by activating B cells to
produce antibodies. This interaction orchestrates the humoral immune response against specific pathogens.
Q4 QUESTION 4 OF 150
Why is it important to maintain a homeostatic balance of glucose in the blood?
CORRECT ANSWER
glucose is used for energy and is not synthesized by the brain, so it is needed to maintain brain/motor
functions
RATIONALE
Maintaining blood glucose homeostasis is critical because the brain is obligate glucose-dependent, relying on
a constant supply for energy to sustain neurological and motor functions. This reliance stems from the brain's
limited capacity for glucose synthesis and storage, necessitating continuous external provision.
Q5 QUESTION 5 OF 150
Differentiate between Innate Immunity and Adaptive Immunity
CORRECT ANSWER
Innate immunity is the body's first line of defense against pathogens. It is general and non-specific, which
means it does not differentiate between types of pathogens. Adaptive immunity is a type of immunity that
is built up as we are exposed to diseases or get vaccinated.
Page 3
, RATIONALE
Innate immunity provides immediate, non-specific defense through physical barriers and phagocytic cells,
whereas adaptive immunity develops slower but offers highly specific, memory-based protection against
particular antigens. This distinction highlights the tiered and specialized nature of the immune system's
response to foreign invaders.
Q6 QUESTION 6 OF 150
Describe how and why our injury response results in the signs of redness, swelling, heat, and pain? Be
sure to use chemokines, histamine, and vasodilation in your response.
CORRECT ANSWER
Our body first releases cytokines which produce inflammatory cells or chemokines directly to the
affected area to stimulate healing. Vasodilation occurs simultaneously to facilitate quicker and easier
movement of inflammatory cells to the area.
RATIONALE
Inflammatory mediators like cytokines and histamine are released, causing vasodilation and increased vascular
permeability, which recruits leukocytes and plasma proteins to the site of injury, producing redness, swelling,
heat, and pain. This coordinated cellular and vascular response, driven by chemokines, initiates tissue repair
and pathogen clearance.
Q7 QUESTION 7 OF 150
What is lymph
CORRECT ANSWER
fluid that flows in lymphatic system to return fluid from tissues into circulation
RATIONALE
Lymph is interstitial fluid that has entered lymphatic vessels, carrying proteins and other substances from
tissues back into the bloodstream to maintain fluid balance. This process is critical for immune surveillance
and the removal of waste products from the interstitial space.
Q8 QUESTION 8 OF 150
Page 4
