WESTERN GOVERNORS UNIVERSITY D236 PATHOPHYSIOLOGY QUESTIONS & ANSWERS 2… 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
Western Governors University
D236 Pathophysiology
Questions & Answers 2026-2027
| Updated Version (Rationales)
Verified Answers Exam Ready With Rationales
295 QUESTIONS
DOCUMENT OVERVIEW
This document provides 295 questions with verified correct answers and detailed rationales for
pathophysiology. It is suitable for comprehensive study, review, and certification preparation in this subject
area. This resource directly aligns with the learning objectives for WGU's D236 course.
CONTENTS
01 • Fluid & Electrolyte Balance 02 03 • Acid-Base Balance
• Immune System & Inflammation
04 • Heart Failure 05 • Potassium & Magnesium 06 • Calcium & Other Minerals
07 08 • Burns & Wound Healing
09
• Genetic & Congenital Disorders • Respiratory System: Anatomy & Gas Exchange
10 • Intracranial Bleeds & TBI 11 • Neurological Disorders 12
• Hypertension & Cardiovascular Risk
Page 1
, 13 14 15
• Cardiac Valves & Endocardium • Vascular Disorders & Thromboembolism
• Hematologic & Lymphatic Cancers
16 • Gastrointestinal Disorders
17 18
• Pulmonary Disorders: Obstructive & Restrictive • Renal & Urinary System Disorders
19 • Endocrine System Disorders
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 295
What is the primary determinant of oncotic pressure?
CORRECT ANSWER
Albumin
RATIONALE
Oncotic pressure, also known as colloid osmotic pressure, is primarily determined by the concentration of large molecules like
albumin within the plasma, which draws water into the capillaries. Albumin's high concentration and negative charge make it the
most significant contributor to maintaining this osmotic gradient.
Q2 QUESTION 2 OF 295
Form of osmotic pressure exerted by proteins
CORRECT ANSWER
Oncotic Pressure
RATIONALE
Oncotic pressure, also known as colloid osmotic pressure, is the osmotic pressure specifically exerted by large molecules like
proteins that cannot easily cross the capillary membrane, drawing water into the capillaries. This is a key concept in understanding
fluid shifts across semipermeable membranes.
Q3 QUESTION 3 OF 295
Page 2
,Fluid and electrolyte levels are regulated by _________________, which regulates actions such as thirst, ADH, the kidneys,
and RAAS.
CORRECT ANSWER
Osmoreceptors
RATIONALE
Osmoreceptors in the hypothalamus detect changes in plasma osmolality, triggering thirst and influencing ADH release to maintain
fluid balance. This system integrates with renal and RAAS functions to precisely regulate body fluid and electrolyte levels.
Q4 QUESTION 4 OF 295
What are the causes of dehydration?
CORRECT ANSWER
#Excessive loss
#Inadequate intake
#Both
RATIONALE
Dehydration arises from either an imbalance where fluid output (e.g., excessive sweating, vomiting, diarrhea) exceeds fluid input, or
from insufficient fluid consumption to meet physiological needs. The underlying principle is the disruption of the body's water
homeostasis.
Q5 QUESTION 5 OF 295
What s/sx are associated with dehydration?
CORRECT ANSWER
#Dry mucous membranes
#Decreased skin turgor
#Decreased urine output
#Low blood pressure
#Tachycardia
#Weak heart rate
#Confusion
RATIONALE
Dehydration reduces circulating blood volume, leading to compensatory tachycardia and hypotension, while decreased tissue
perfusion manifests as dry mucous membranes, poor skin turgor, reduced urine output, and potentially confusion. The key concept
tested is the physiological response of the body to hypovolemia.
Page 3
, Q6 QUESTION 6 OF 295
Normal sodium level
CORRECT ANSWER
135-145
RATIONALE
Normal serum sodium concentration, a critical electrolyte for maintaining fluid balance and nerve impulse transmission, typically
ranges from 135 to 145 milliequivalents per liter. This range reflects the body's tight regulation of sodium to ensure cellular function
and osmotic pressure homeostasis.
Q7 QUESTION 7 OF 295
Hyponatremia is indicated by what lab result? S/Sx?
CORRECT ANSWER
Na < 135
Loss of energy or fatigue
Nausea and vomiting
Headache
Confusion
Muscle spasms
Low blood pressure
Dark scanty urine
Irritability, disorientation and neurological manifestations
Seizures
RATIONALE
Hyponatremia is defined by a serum sodium level below 135 mEq/L, reflecting a deficit of sodium in the extracellular fluid that
impairs nerve impulse transmission and causes cellular swelling, leading to neurological symptoms. This electrolyte imbalance
disrupts normal fluid distribution, impacting cellular function and manifesting as fatigue, confusion, and muscle spasms.
Q8 QUESTION 8 OF 295
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
Western Governors University
D236 Pathophysiology
Questions & Answers 2026-2027
| Updated Version (Rationales)
Verified Answers Exam Ready With Rationales
295 QUESTIONS
DOCUMENT OVERVIEW
This document provides 295 questions with verified correct answers and detailed rationales for
pathophysiology. It is suitable for comprehensive study, review, and certification preparation in this subject
area. This resource directly aligns with the learning objectives for WGU's D236 course.
CONTENTS
01 • Fluid & Electrolyte Balance 02 03 • Acid-Base Balance
• Immune System & Inflammation
04 • Heart Failure 05 • Potassium & Magnesium 06 • Calcium & Other Minerals
07 08 • Burns & Wound Healing
09
• Genetic & Congenital Disorders • Respiratory System: Anatomy & Gas Exchange
10 • Intracranial Bleeds & TBI 11 • Neurological Disorders 12
• Hypertension & Cardiovascular Risk
Page 1
, 13 14 15
• Cardiac Valves & Endocardium • Vascular Disorders & Thromboembolism
• Hematologic & Lymphatic Cancers
16 • Gastrointestinal Disorders
17 18
• Pulmonary Disorders: Obstructive & Restrictive • Renal & Urinary System Disorders
19 • Endocrine System Disorders
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 295
What is the primary determinant of oncotic pressure?
CORRECT ANSWER
Albumin
RATIONALE
Oncotic pressure, also known as colloid osmotic pressure, is primarily determined by the concentration of large molecules like
albumin within the plasma, which draws water into the capillaries. Albumin's high concentration and negative charge make it the
most significant contributor to maintaining this osmotic gradient.
Q2 QUESTION 2 OF 295
Form of osmotic pressure exerted by proteins
CORRECT ANSWER
Oncotic Pressure
RATIONALE
Oncotic pressure, also known as colloid osmotic pressure, is the osmotic pressure specifically exerted by large molecules like
proteins that cannot easily cross the capillary membrane, drawing water into the capillaries. This is a key concept in understanding
fluid shifts across semipermeable membranes.
Q3 QUESTION 3 OF 295
Page 2
,Fluid and electrolyte levels are regulated by _________________, which regulates actions such as thirst, ADH, the kidneys,
and RAAS.
CORRECT ANSWER
Osmoreceptors
RATIONALE
Osmoreceptors in the hypothalamus detect changes in plasma osmolality, triggering thirst and influencing ADH release to maintain
fluid balance. This system integrates with renal and RAAS functions to precisely regulate body fluid and electrolyte levels.
Q4 QUESTION 4 OF 295
What are the causes of dehydration?
CORRECT ANSWER
#Excessive loss
#Inadequate intake
#Both
RATIONALE
Dehydration arises from either an imbalance where fluid output (e.g., excessive sweating, vomiting, diarrhea) exceeds fluid input, or
from insufficient fluid consumption to meet physiological needs. The underlying principle is the disruption of the body's water
homeostasis.
Q5 QUESTION 5 OF 295
What s/sx are associated with dehydration?
CORRECT ANSWER
#Dry mucous membranes
#Decreased skin turgor
#Decreased urine output
#Low blood pressure
#Tachycardia
#Weak heart rate
#Confusion
RATIONALE
Dehydration reduces circulating blood volume, leading to compensatory tachycardia and hypotension, while decreased tissue
perfusion manifests as dry mucous membranes, poor skin turgor, reduced urine output, and potentially confusion. The key concept
tested is the physiological response of the body to hypovolemia.
Page 3
, Q6 QUESTION 6 OF 295
Normal sodium level
CORRECT ANSWER
135-145
RATIONALE
Normal serum sodium concentration, a critical electrolyte for maintaining fluid balance and nerve impulse transmission, typically
ranges from 135 to 145 milliequivalents per liter. This range reflects the body's tight regulation of sodium to ensure cellular function
and osmotic pressure homeostasis.
Q7 QUESTION 7 OF 295
Hyponatremia is indicated by what lab result? S/Sx?
CORRECT ANSWER
Na < 135
Loss of energy or fatigue
Nausea and vomiting
Headache
Confusion
Muscle spasms
Low blood pressure
Dark scanty urine
Irritability, disorientation and neurological manifestations
Seizures
RATIONALE
Hyponatremia is defined by a serum sodium level below 135 mEq/L, reflecting a deficit of sodium in the extracellular fluid that
impairs nerve impulse transmission and causes cellular swelling, leading to neurological symptoms. This electrolyte imbalance
disrupts normal fluid distribution, impacting cellular function and manifesting as fatigue, confusion, and muscle spasms.
Q8 QUESTION 8 OF 295
Page 4
