150 Comprehensive Practice Questions with Verified
Answers & Detailed Rationales
EXAM INSTRUCTIONS
Course: SCI 225 – Pathophysiology
Institution: Nightingale College
Exam: Midterm Examination
Academic Year: 2026/2027
Total Questions: 150
Format: Multiple Choice
Content Areas: Cellular Adaptation & Injury, Genetics, Inflammation & Immunity,
Fluid/Electrolyte & Acid-Base Balance, Disease Processes, Wound Healing,
Hypersensitivity Reactions
SECTION 1: FUNDAMENTALS OF PATHOPHYSIOLOGY (Questions 1-
20)
1. Pathophysiology is best defined as the study of:
a) The structural alterations in cells and tissues that identify disease
b) The underlying changes in body physiology that result from disease or injury
c) The tracking of disease occurrence and transmission among populations
d) The naming and identification of diseases based on signs and symptoms
,Rationale: Pathophysiology focuses on the underlying changes in body physiology at the
molecular, cellular, and organ system levels that result from disease or injury. Pathology
investigates structural alterations in cells, tissues, and organs. Epidemiology tracks disease
patterns among populations. Diagnosis is the naming or identification of a disease .
2. Pathology is best defined as the:
a) Study of the cause of disease
b) Investigation of structural alterations in cells, tissues, and organs to identify the cause
of a particular disease
c) Study of tracking patterns of disease occurrence among populations
d) Naming or identification of a disease based on signs and symptoms
Rationale: Pathology is the investigation of structural alterations in cells, tissues, and
organs, which can help identify the cause of a particular disease. Etiology is the study of
the cause of disease. Epidemiology tracks disease patterns. Diagnosis is the naming or
identification of a disease .
3. Etiology refers to the study of:
a) The naming or identification of a disease
b) The underlying changes in body physiology from disease
c) The cause of disease
d) The tracking of disease patterns among populations
Rationale: Etiology is the study of the CAUSE of disease. Diagnosis is the naming or
identification of a disease. Pathophysiology studies the functional changes from disease.
Epidemiology tracks disease patterns and transmission among populations .
4. Epidemiology is the study of:
a) The cause of disease
b) The naming of disease
c) Tracking patterns of disease occurrence and transmission among populations and
,geographic areas
d) Structural alterations in cells and tissues
Rationale: Epidemiology is the study of tracking patterns or disease occurrence and
transmission among populations and by geographic areas. Etiology studies disease causes.
Diagnosis is the naming of disease. Pathology investigates structural alterations .
5. Which cellular organelle is known as the "powerhouse of the cell" and is the site
of ATP production?
a) Nucleus
b) Ribosome
c) Mitochondria
d) Lysosome
Rationale: Mitochondria are the powerhouse of the cell, the organelle that is the site of
ATP (energy) production. The nucleus controls and regulates cell activities and carries
genes. Ribosomes provide sites for cellular protein synthesis. Lysosomes contain enzymes
for digesting cellular substances .
6. The organelle that controls and regulates cell activities and carries the genes
containing hereditary information is the:
a) Cytoplasm
b) Nucleus
c) Golgi apparatus
d) Endoplasmic reticulum
Rationale: The nucleus controls and regulates the activities of the cell (e.g., growth and
metabolism) and carries the genes, structures that contain the hereditary information. The
cytoplasm is the aqueous medium for chemical reactions. The Golgi apparatus processes
and packages proteins. The endoplasmic reticulum specializes in synthesis, folding, and
transport of proteins .
, 7. Which organelle contains oxidase enzymes that detoxify alcohol, hydrogen
peroxide, and other harmful chemicals?
a) Lysosomes
b) Peroxisomes
c) Ribosomes
d) Mitochondria
Rationale: Peroxisomes contain oxidase enzymes that detoxify alcohol, hydrogen peroxide,
and other harmful chemicals. Lysosomes contain enzymes for digesting cellular
substances. Ribosomes provide sites for protein synthesis. Mitochondria are the site of ATP
production .
8. The organelle responsible for processing and packaging proteins into secretory
vesicles is the:
a) Endoplasmic reticulum
b) Ribosome
c) Golgi apparatus
d) Lysosome
Rationale: The Golgi apparatus is responsible for processing and packaging proteins onto
secretory vesicles that break away from the complex and migrate to various intracellular
and extracellular destinations, including the plasma membrane. The endoplasmic
reticulum synthesizes, folds, and transports proteins. Ribosomes provide sites for protein
synthesis .
9. The plasma membrane functions as a:
a) Site for protein synthesis
b) Powerhouse of the cell
c) Selective barrier regulating the cell's chemical composition
d) Digestive organelle for cellular substances
Rationale: The plasma membrane acts as a selective barrier, thereby regulating the cell's
chemical composition. It also functions in signaling processes. Mitochondria are the
powerhouse of the cell. Ribosomes are sites for protein synthesis. Lysosomes digest cellular
substances .
Answers & Detailed Rationales
EXAM INSTRUCTIONS
Course: SCI 225 – Pathophysiology
Institution: Nightingale College
Exam: Midterm Examination
Academic Year: 2026/2027
Total Questions: 150
Format: Multiple Choice
Content Areas: Cellular Adaptation & Injury, Genetics, Inflammation & Immunity,
Fluid/Electrolyte & Acid-Base Balance, Disease Processes, Wound Healing,
Hypersensitivity Reactions
SECTION 1: FUNDAMENTALS OF PATHOPHYSIOLOGY (Questions 1-
20)
1. Pathophysiology is best defined as the study of:
a) The structural alterations in cells and tissues that identify disease
b) The underlying changes in body physiology that result from disease or injury
c) The tracking of disease occurrence and transmission among populations
d) The naming and identification of diseases based on signs and symptoms
,Rationale: Pathophysiology focuses on the underlying changes in body physiology at the
molecular, cellular, and organ system levels that result from disease or injury. Pathology
investigates structural alterations in cells, tissues, and organs. Epidemiology tracks disease
patterns among populations. Diagnosis is the naming or identification of a disease .
2. Pathology is best defined as the:
a) Study of the cause of disease
b) Investigation of structural alterations in cells, tissues, and organs to identify the cause
of a particular disease
c) Study of tracking patterns of disease occurrence among populations
d) Naming or identification of a disease based on signs and symptoms
Rationale: Pathology is the investigation of structural alterations in cells, tissues, and
organs, which can help identify the cause of a particular disease. Etiology is the study of
the cause of disease. Epidemiology tracks disease patterns. Diagnosis is the naming or
identification of a disease .
3. Etiology refers to the study of:
a) The naming or identification of a disease
b) The underlying changes in body physiology from disease
c) The cause of disease
d) The tracking of disease patterns among populations
Rationale: Etiology is the study of the CAUSE of disease. Diagnosis is the naming or
identification of a disease. Pathophysiology studies the functional changes from disease.
Epidemiology tracks disease patterns and transmission among populations .
4. Epidemiology is the study of:
a) The cause of disease
b) The naming of disease
c) Tracking patterns of disease occurrence and transmission among populations and
,geographic areas
d) Structural alterations in cells and tissues
Rationale: Epidemiology is the study of tracking patterns or disease occurrence and
transmission among populations and by geographic areas. Etiology studies disease causes.
Diagnosis is the naming of disease. Pathology investigates structural alterations .
5. Which cellular organelle is known as the "powerhouse of the cell" and is the site
of ATP production?
a) Nucleus
b) Ribosome
c) Mitochondria
d) Lysosome
Rationale: Mitochondria are the powerhouse of the cell, the organelle that is the site of
ATP (energy) production. The nucleus controls and regulates cell activities and carries
genes. Ribosomes provide sites for cellular protein synthesis. Lysosomes contain enzymes
for digesting cellular substances .
6. The organelle that controls and regulates cell activities and carries the genes
containing hereditary information is the:
a) Cytoplasm
b) Nucleus
c) Golgi apparatus
d) Endoplasmic reticulum
Rationale: The nucleus controls and regulates the activities of the cell (e.g., growth and
metabolism) and carries the genes, structures that contain the hereditary information. The
cytoplasm is the aqueous medium for chemical reactions. The Golgi apparatus processes
and packages proteins. The endoplasmic reticulum specializes in synthesis, folding, and
transport of proteins .
, 7. Which organelle contains oxidase enzymes that detoxify alcohol, hydrogen
peroxide, and other harmful chemicals?
a) Lysosomes
b) Peroxisomes
c) Ribosomes
d) Mitochondria
Rationale: Peroxisomes contain oxidase enzymes that detoxify alcohol, hydrogen peroxide,
and other harmful chemicals. Lysosomes contain enzymes for digesting cellular
substances. Ribosomes provide sites for protein synthesis. Mitochondria are the site of ATP
production .
8. The organelle responsible for processing and packaging proteins into secretory
vesicles is the:
a) Endoplasmic reticulum
b) Ribosome
c) Golgi apparatus
d) Lysosome
Rationale: The Golgi apparatus is responsible for processing and packaging proteins onto
secretory vesicles that break away from the complex and migrate to various intracellular
and extracellular destinations, including the plasma membrane. The endoplasmic
reticulum synthesizes, folds, and transports proteins. Ribosomes provide sites for protein
synthesis .
9. The plasma membrane functions as a:
a) Site for protein synthesis
b) Powerhouse of the cell
c) Selective barrier regulating the cell's chemical composition
d) Digestive organelle for cellular substances
Rationale: The plasma membrane acts as a selective barrier, thereby regulating the cell's
chemical composition. It also functions in signaling processes. Mitochondria are the
powerhouse of the cell. Ribosomes are sites for protein synthesis. Lysosomes digest cellular
substances .
