ESSENTIALS FOR PATHOPHYSIOLOGY FOR NURSING
PRACTICE
,Table of Contents
Section 1 Health and Disease
Chapter 1 Variation and Disease
Chapter 2 Health and Disease in Society
Chapter 3 Principles of Pharmacology
Chapter 4 Genetic Disorders
Chapter 5 Mental Ill-Health
Section 2 Key Causes of Disease
Chapter 6 Disorders of Immunity and Defence
Chapter 7 Disorders of Blood and Blood Supply
Chapter 8 Cellular Adaptation and Neoplastic Disorders
Chapter 9 Disorders of Support and Protection
Section 3 Disorders of Homeostasis
Chapter 10 Disorders of Renal Function and Fluid Balance
Chapter 11 Disorders of Nutrient Supply and Faecal Elimination
Chapter 12 Disorders of Metabolism
Chapter 13 Disorders of Oxygenation and Carbon Dioxide Elimination
Chapter 14 Disorders of the Cardiovascular System
Section 4 Disorders of Control and Coordination
Chapter 15 Disorders of Neurological Control
Chapter 16 Disorders of Endocrine Regulation
Chapter 17 Disorders of the Female Reproductive System
Chapter 18 Disorders of the Male Reproductive System
,Essentials of Pathophysiology for Nursing Practice, 2nd Edition
Neal Cook
Instructions: Each chapter contains multiple-choice questions arranged in progressive difficulty
(foundational → application → analysis). Answer keys with detailed rationales follow
immediately after each question set. Questions are labeled by difficulty: (F) = Foundational, (A)
= Application, (An) = Analysis
SECTION 1: HEALTH AND DISEASE
CHAPTER 1: VARIATION AND DISEASE
Multiple Choice Questions
Question 1 (F)
Which of the following BEST defines "pathophysiology" in the context of nursing practice?
A. The study of medications and their effects on the body
B. The study of structural changes caused by disease at the cellular level only
C. The study of functional changes that occur in the body as a result of disease or injury
D. The study of psychological responses to illness and hospitalization
✅Answer: C
Rationale: Pathophysiology is defined as the study of functional changes that occur in the body
as a result of disease or injury. It bridges normal physiology and clinical disease, helping nurses
understand why signs and symptoms occur. Option A describes pharmacology. Option B is too
narrow, referring only to structural/cellular changes (which is closer to histopathology). Option
D describes psychosocial nursing or health psychology.
Question 2 (F)
The term "homeostasis" refers to which of the following?
,A. The complete absence of disease in a living organism
B. The body's ability to maintain a stable internal environment despite external changes
C. The genetic predisposition to developing chronic illness
D. The process by which cells adapt to prolonged stress
✅Answer: B
Rationale: Homeostasis refers to the dynamic equilibrium maintained within the body's internal
environment, regulated by feedback mechanisms. It does not mean the absence of disease (A),
nor is it related solely to genetics (C) or cellular adaptation (D). Understanding homeostasis is
foundational to understanding how disease disrupts normal function.
Question 3 (F)
Which of the following BEST illustrates "normal variation" in human biology?
A. A patient with a blood glucose of 25 mmol/L after fasting
B. A patient whose blood pressure fluctuates between 118/76 and 124/80 mmHg throughout the
day
C. A patient who develops jaundice following liver failure
D. A patient who experiences chest pain during a myocardial infarction
✅Answer: B
Rationale: Normal variation refers to the expected, physiological differences seen within and
between individuals that do not indicate disease. Mild blood pressure fluctuations throughout the
day are normal and expected. Option A (elevated glucose after fasting) and Option D (chest pain
during MI) are pathological. Option C (jaundice) is a clinical sign of disease.
Question 4 (F)
The concept of a "reference range" in clinical practice is BEST described as:
A. The exact normal value expected for every individual patient
B. The range of values found in 95% of a healthy reference population
C. The maximum safe value for any given physiological measurement
D. The average measurement obtained from patients with a specific diagnosis
,✅Answer: B
Rationale: A reference range (also called a normal range) represents the central 95% of values
measured in a healthy population. It is important to note that 5% of healthy individuals will fall
outside this range without having disease. This is why clinical context always accompanies
laboratory interpretation. Options A and C are incorrect because reference ranges are not exact
values or maximum safe thresholds, and Option D defines a disease-specific parameter rather
than a population-based norm.
Question 5 (F)
A disease that is consistently present at a low but predictable level within a specific geographic
region is described as:
A. Epidemic
B. Pandemic
C. Endemic
D. Sporadic
✅Answer: C
Rationale: An endemic disease is one that is habitually present in a specific population or
region at a relatively stable and predictable rate (e.g., malaria in certain tropical regions).
An epidemic refers to a sudden increase above the expected rate. A pandemic is a worldwide
epidemic. Sporadic refers to cases that occur infrequently and without a clear pattern.
Understanding these epidemiological terms helps nurses assess disease risk in their patient
populations.
Question 6 (A)
A 45-year-old male presents with a blood pressure of 148/95 mmHg. His nurse understands that
labeling this as "hypertension" requires consideration of:
A. The patient's age alone, as blood pressure always rises with age
B. A single measurement taken under controlled conditions
C. Multiple readings, clinical context, lifestyle factors, and comparison with population reference
ranges
D. The reference range for females only, as males rarely develop hypertension before age 60
,✅Answer: C
Rationale: Determining whether a measurement represents disease requires multiple readings,
clinical context (e.g., anxiety, white-coat effect), lifestyle factors (diet, activity, stress), and
comparison with established reference ranges. A single reading can be misleading. Blood
pressure does tend to increase with age, but this is not sufficient justification for diagnosis (A is
incomplete). Reference ranges apply across sexes with appropriate adjustments; Option D is
clinically incorrect.
Question 7 (A)
Which of the following scenarios BEST exemplifies the concept of "subclinical disease"?
A. A patient who experiences severe chest pain and is admitted to the ICU with ST-elevation
myocardial infarction
B. A patient who has detectable atherosclerotic plaques on imaging but reports no symptoms
C. A patient who has fully recovered from pneumonia and no longer shows radiological changes
D. A patient who refuses treatment for a known diagnosed condition
✅Answer: B
Rationale: Subclinical disease refers to a pathological process that is measurable or detectable
through diagnostic tools but has not yet produced symptoms the patient is aware of.
Atherosclerosis can be present and detectable on imaging long before it causes symptoms like
chest pain. Option A represents overt clinical disease. Option C represents recovery. Option D is
non-compliance, which is not a disease stage.
Question 8 (A)
A nurse is reviewing the concept of aetiology. Which of the following statements is MOST
accurate?
A. Aetiology refers to the progression of a disease once it has been diagnosed
B. Aetiology refers to the cause or origin of a disease
C. Aetiology is another term for the physical examination findings associated with a disease
D. Aetiology refers specifically to inherited causes of disease
✅Answer: B
,Rationale: Aetiology (etiology) refers to the cause or origin of a disease. This includes
infectious agents, genetic factors, environmental exposure, lifestyle choices, and idiopathic
(unknown) causes. Option A describes pathogenesis (the mechanism of disease development).
Option C describes clinical signs. Option D is too narrow — aetiology encompasses all causes,
not just inherited ones.
Question 9 (An)
A nurse understands that the same pathological process can produce different clinical
presentations in different patients. This phenomenon is BEST explained by which of the
following concepts?
A. Homeostatic redundancy
B. Biological variation and host-specific factors
C. The placebo effect
D. Tertiary prevention strategies
✅Answer: B
Rationale: Biological variation and host-specific factors (including genetics, age, sex,
immune status, comorbidities, and environmental exposures) explain why the same disease can
present very differently in different individuals. For example, COVID-19 may be asymptomatic
in one person and life-threatening in another. Option A (homeostatic redundancy) relates to
compensatory mechanisms but does not explain variable presentation. Options C and D are
unrelated concepts.
Question 10 (An)
A public health nurse is analyzing disease distribution data. She notices that the incidence of
Type 2 diabetes is significantly higher in a low-income urban neighborhood compared to a
wealthier suburban area. Which conclusion BEST reflects the pathophysiological and social
understanding of disease variation?
A. Genetic mutations are entirely responsible for the increased incidence in the urban population
B. Disease incidence is influenced solely by individual lifestyle choices independent of social
context
C. The variation likely reflects the interaction of genetic predisposition, social determinants,
dietary patterns, and access to healthcare
D. The higher incidence indicates that Type 2 diabetes is an endemic disease confined to urban
populations
, ✅Answer: C
Rationale: Modern pathophysiology recognizes that disease is multifactorial. Type 2 diabetes
incidence is shaped by genetic susceptibility AND environmental/social determinants such as
food access, socioeconomic status, stress, physical activity opportunities, and healthcare access.
Option A is reductive. Option B ignores social determinants of health. Option D misapplies the
definition of endemic disease — Type 2 diabetes is not geographically confined in this way.