Pathophysiology Exam 1 Practice
This Pathophysiology focuses on foundational concepts including cellular biology, adaptation, injury,
inflammation, and fluid and electrolyte balance. Key study areas often include the mechanisms of
homeostasis, the stages of general adaptation syndrome (GAS), and the distinct differences between
various cellular adaptations and genetic disorders.
Core Foundational Concepts
Definitions: Pathophysiology is the study of physiologic (functional) changes resulting from a disease
process.
Etiology: The original cause of cell alteration or disease. If unknown, it is called idiopathic; if caused
by medical treatment, it is iatrogenic.
Pathogenesis: How the disease evolves from initial contact to the expression of the disease.
Homeostasis: The maintenance of a stable internal environment. This is often achieved through
negative feedback (e.g., temperature regulation).
Signs vs. Symptoms: Signs are objective findings that can be seen or measured (e.g., blood pressure),
while symptoms are subjective reports from the patient (e.g., pain or fatigue).
Cellular Adaptation and Injury
Cells adapt to stressors to maintain homeostasis, which can be physiologic (normal) or pathologic
(disease-related).
Types of Adaptation:
Atrophy: Cells revert to a smaller size due to decreased metabolic demand (e.g., muscle shrinkage
after paralysis).
Hypertrophy: An increase in cell size and functional workload.
Hyperplasia: An increase in the number of cells in a tissue or organ.
Metaplasia: The replacement of one cell type by another.
1
, Dysplasia: Deranged cellular growth where cells vary in size, shape, and organization.
Cell Injury Causes: The most common cause is hypoxia (oxygen deprivation), which interrupts
oxidative metabolism and ATP generation. This leads to symptoms such as increased heart rate,
metabolic acidosis, and peripheral vasoconstriction.
Inflammation and Healing
Inflammation is a protective, coordinated response to an injurious agent.
Cardinal Signs: Redness, heat, swelling, pain, and loss of function.
Vascular Phase: Involves vasodilation and increased vascular permeability to bring defenses to the
site of injury.
Stages of Wound Healing:
Hemostasis: Formation of a blood clot.
Inflammation: Lasts 3–7 days.
Proliferation: Lasts several weeks; includes granulation and epithelialization.
Remodeling: Lasts 21 days to 2 years; involves scar formation.
Fluid, Electrolytes, and Acid-Base Balance
Fluid Distribution: Water moves between compartments via osmosis (moving from low to high
concentration). Oncotic pressure, exerted by proteins like albumin, pulls fluid into the intravascular
space.
Electrolyte Imbalances:
Sodium: Hyponatremia can cause confusion and potentially fatal brain pressure. Hypernatremia
often relates to dehydration.
Potassium: The major intracellular ion. Imbalances can lead to abnormal EKG findings.
Calcium: Stored in bones along with magnesium and phosphorus. Imbalances can cause muscle
spasms (hypocalcemia) or kidney stones (hypercalcemia).
Acid-Base Regulation: The body uses three lines of defense to regulate pH: chemical buffer systems
(fastest), the respiratory system (minutes to hours), and the renal system (slowest but most
effective).
Quiz_________________?
A 10-year-old male is stung by a bee while playing in the yard. He begins itching and
develops pain, swelling, redness, and respiratory difficulties. He is suffering from:
2
, A. Immunodeficiency
B. Autoimmunity
C. Anaphylaxis
D. Tissue-specific hypersensitivity -
Answer✅
C
Quiz_________________?
A 10-year-old male is stung by a bee while playing in the yard. He experiences a severe
allergic reaction and has to go to the ER. The nurse providing care realizes this reaction is
the result of:
A. Toxoids
B. IgA
C. IgE
D. IgM -
Answer✅
C
IgE is a mediator of many common allergic responses
3
, Quiz_________________?
A 10-year-old male presents to his primary care provider reporting wheezing and difficulty
breathing. History reveals that both of the child's parents suffer from allergies. Which of the
following terms would be used to classify the child?
A. desensitized
B. atopic
C. hyperactive
D. autoimmune -
Answer✅
B
Quiz_________________?
A 20-year-old college student has presented to her campus medical clinic for a scheduled
Pap smear. The clinician who will interpret the smear will examine cell samples for evidence
of:
A. Changes in cell shape, size, and organization
B. Presence of unexpected cell types
C. Ischemic changes in cell sample
D. Abnormally high numbers of cells -
Answer✅
A
Quiz_________________?
A 21-year-old female was recently diagnosed with iron deficiency anemia. In addition to
fatigue and weakness, which of the following clinical signs and symptoms would she most
likely exhibit?
A. Hyperactivity
4
This Pathophysiology focuses on foundational concepts including cellular biology, adaptation, injury,
inflammation, and fluid and electrolyte balance. Key study areas often include the mechanisms of
homeostasis, the stages of general adaptation syndrome (GAS), and the distinct differences between
various cellular adaptations and genetic disorders.
Core Foundational Concepts
Definitions: Pathophysiology is the study of physiologic (functional) changes resulting from a disease
process.
Etiology: The original cause of cell alteration or disease. If unknown, it is called idiopathic; if caused
by medical treatment, it is iatrogenic.
Pathogenesis: How the disease evolves from initial contact to the expression of the disease.
Homeostasis: The maintenance of a stable internal environment. This is often achieved through
negative feedback (e.g., temperature regulation).
Signs vs. Symptoms: Signs are objective findings that can be seen or measured (e.g., blood pressure),
while symptoms are subjective reports from the patient (e.g., pain or fatigue).
Cellular Adaptation and Injury
Cells adapt to stressors to maintain homeostasis, which can be physiologic (normal) or pathologic
(disease-related).
Types of Adaptation:
Atrophy: Cells revert to a smaller size due to decreased metabolic demand (e.g., muscle shrinkage
after paralysis).
Hypertrophy: An increase in cell size and functional workload.
Hyperplasia: An increase in the number of cells in a tissue or organ.
Metaplasia: The replacement of one cell type by another.
1
, Dysplasia: Deranged cellular growth where cells vary in size, shape, and organization.
Cell Injury Causes: The most common cause is hypoxia (oxygen deprivation), which interrupts
oxidative metabolism and ATP generation. This leads to symptoms such as increased heart rate,
metabolic acidosis, and peripheral vasoconstriction.
Inflammation and Healing
Inflammation is a protective, coordinated response to an injurious agent.
Cardinal Signs: Redness, heat, swelling, pain, and loss of function.
Vascular Phase: Involves vasodilation and increased vascular permeability to bring defenses to the
site of injury.
Stages of Wound Healing:
Hemostasis: Formation of a blood clot.
Inflammation: Lasts 3–7 days.
Proliferation: Lasts several weeks; includes granulation and epithelialization.
Remodeling: Lasts 21 days to 2 years; involves scar formation.
Fluid, Electrolytes, and Acid-Base Balance
Fluid Distribution: Water moves between compartments via osmosis (moving from low to high
concentration). Oncotic pressure, exerted by proteins like albumin, pulls fluid into the intravascular
space.
Electrolyte Imbalances:
Sodium: Hyponatremia can cause confusion and potentially fatal brain pressure. Hypernatremia
often relates to dehydration.
Potassium: The major intracellular ion. Imbalances can lead to abnormal EKG findings.
Calcium: Stored in bones along with magnesium and phosphorus. Imbalances can cause muscle
spasms (hypocalcemia) or kidney stones (hypercalcemia).
Acid-Base Regulation: The body uses three lines of defense to regulate pH: chemical buffer systems
(fastest), the respiratory system (minutes to hours), and the renal system (slowest but most
effective).
Quiz_________________?
A 10-year-old male is stung by a bee while playing in the yard. He begins itching and
develops pain, swelling, redness, and respiratory difficulties. He is suffering from:
2
, A. Immunodeficiency
B. Autoimmunity
C. Anaphylaxis
D. Tissue-specific hypersensitivity -
Answer✅
C
Quiz_________________?
A 10-year-old male is stung by a bee while playing in the yard. He experiences a severe
allergic reaction and has to go to the ER. The nurse providing care realizes this reaction is
the result of:
A. Toxoids
B. IgA
C. IgE
D. IgM -
Answer✅
C
IgE is a mediator of many common allergic responses
3
, Quiz_________________?
A 10-year-old male presents to his primary care provider reporting wheezing and difficulty
breathing. History reveals that both of the child's parents suffer from allergies. Which of the
following terms would be used to classify the child?
A. desensitized
B. atopic
C. hyperactive
D. autoimmune -
Answer✅
B
Quiz_________________?
A 20-year-old college student has presented to her campus medical clinic for a scheduled
Pap smear. The clinician who will interpret the smear will examine cell samples for evidence
of:
A. Changes in cell shape, size, and organization
B. Presence of unexpected cell types
C. Ischemic changes in cell sample
D. Abnormally high numbers of cells -
Answer✅
A
Quiz_________________?
A 21-year-old female was recently diagnosed with iron deficiency anemia. In addition to
fatigue and weakness, which of the following clinical signs and symptoms would she most
likely exhibit?
A. Hyperactivity
4
