,1. Which statement best describes pathophysiology?
A. The study of medications and their therapeutic effects
B. The study of how disease alters normal physiologic processes
C. The study of microorganisms exclusively
D. The study of normal human anatomy only
Correct Answer: B. The study of how disease alters normal physiologic processes
Rationale: Pathophysiology examines changes from normal physiological functioning that occur
as a result of disease or injury. SCI 225 specifically emphasizes understanding disease through
changes in normal physiology.
2. Which concept is most important when studying a disease process?
A. Memorizing the disease name only
B. Understanding the relationship between cause, mechanism, manifestations, and
complications
C. Learning only the medication used to treat it
D. Knowing the patient's insurance status
Correct Answer: B. Understanding the relationship between cause, mechanism,
manifestations, and complications
Rationale: Pathophysiology requires understanding how a disease begins, how it alters normal
function, what manifestations result, and how complications develop.
3. Which cellular adaptation involves an increase in cell size?
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: B. Hypertrophy
Rationale: Hypertrophy is an increase in the size of individual cells, resulting in enlargement of
the affected tissue or organ.
4. Which cellular adaptation involves an increase in the number of cells?
A. Hypertrophy
B. Atrophy
C. Hyperplasia
D. Apoptosis
,Correct Answer: C. Hyperplasia
Rationale: Hyperplasia occurs when cells proliferate, increasing the number of cells within a
tissue or organ.
5. A skeletal muscle becomes smaller after prolonged immobilization. Which process is
occurring?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C. Atrophy
Rationale: Atrophy is a reduction in cell size and, consequently, tissue or organ size. Disuse is a
common cause of skeletal muscle atrophy.
6. What is metaplasia?
A. Irreversible cell death
B. Replacement of one differentiated cell type with another differentiated cell type
C. Increase in cell size
D. Increase in blood volume
Correct Answer: B. Replacement of one differentiated cell type with another differentiated
cell type
Rationale: Metaplasia is an adaptive response in which one mature cell type is replaced by
another that may better tolerate a chronic stressor.
7. Which cellular process is generally considered programmed cell death?
A. Necrosis
B. Apoptosis
C. Hypertrophy
D. Hyperplasia
Correct Answer: B. Apoptosis
Rationale: Apoptosis is regulated or programmed cell death. It differs from necrosis, which
typically involves cell injury, membrane disruption, and inflammation.
8. Which feature is more characteristic of necrosis than apoptosis?
, A. Controlled cellular elimination
B. Minimal inflammatory response
C. Cell membrane disruption and inflammation
D. Normal physiologic turnover
Correct Answer: C. Cell membrane disruption and inflammation
Rationale: Necrosis commonly involves loss of membrane integrity and release of cellular
contents, which can trigger inflammation.
9. Which condition most directly causes cellular hypoxia?
A. Increased oxygen delivery
B. Reduced oxygen availability to tissues
C. Increased ATP production
D. Increased blood oxygen saturation
Correct Answer: B. Reduced oxygen availability to tissues
Rationale: Hypoxia occurs when tissues do not receive adequate oxygen for normal cellular
metabolism.
10. Why is ATP depletion dangerous to cells?
A. It increases normal membrane transport
B. It interferes with energy-dependent cellular processes
C. It prevents all protein synthesis immediately
D. It always causes hyperplasia
Correct Answer: B. It interferes with energy-dependent cellular processes
Rationale: ATP is required for processes such as maintenance of ion gradients. ATP depletion
can impair membrane pumps, causing cellular swelling and dysfunction.
11. Which cellular organelle is primarily responsible for ATP production?
A. Lysosome
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Correct Answer: C. Mitochondrion
Rationale: Mitochondria generate most cellular ATP through oxidative phosphorylation.
12. Which substance can contribute to oxidative cellular injury?
A. The study of medications and their therapeutic effects
B. The study of how disease alters normal physiologic processes
C. The study of microorganisms exclusively
D. The study of normal human anatomy only
Correct Answer: B. The study of how disease alters normal physiologic processes
Rationale: Pathophysiology examines changes from normal physiological functioning that occur
as a result of disease or injury. SCI 225 specifically emphasizes understanding disease through
changes in normal physiology.
2. Which concept is most important when studying a disease process?
A. Memorizing the disease name only
B. Understanding the relationship between cause, mechanism, manifestations, and
complications
C. Learning only the medication used to treat it
D. Knowing the patient's insurance status
Correct Answer: B. Understanding the relationship between cause, mechanism,
manifestations, and complications
Rationale: Pathophysiology requires understanding how a disease begins, how it alters normal
function, what manifestations result, and how complications develop.
3. Which cellular adaptation involves an increase in cell size?
A. Atrophy
B. Hypertrophy
C. Hyperplasia
D. Metaplasia
Correct Answer: B. Hypertrophy
Rationale: Hypertrophy is an increase in the size of individual cells, resulting in enlargement of
the affected tissue or organ.
4. Which cellular adaptation involves an increase in the number of cells?
A. Hypertrophy
B. Atrophy
C. Hyperplasia
D. Apoptosis
,Correct Answer: C. Hyperplasia
Rationale: Hyperplasia occurs when cells proliferate, increasing the number of cells within a
tissue or organ.
5. A skeletal muscle becomes smaller after prolonged immobilization. Which process is
occurring?
A. Hypertrophy
B. Hyperplasia
C. Atrophy
D. Metaplasia
Correct Answer: C. Atrophy
Rationale: Atrophy is a reduction in cell size and, consequently, tissue or organ size. Disuse is a
common cause of skeletal muscle atrophy.
6. What is metaplasia?
A. Irreversible cell death
B. Replacement of one differentiated cell type with another differentiated cell type
C. Increase in cell size
D. Increase in blood volume
Correct Answer: B. Replacement of one differentiated cell type with another differentiated
cell type
Rationale: Metaplasia is an adaptive response in which one mature cell type is replaced by
another that may better tolerate a chronic stressor.
7. Which cellular process is generally considered programmed cell death?
A. Necrosis
B. Apoptosis
C. Hypertrophy
D. Hyperplasia
Correct Answer: B. Apoptosis
Rationale: Apoptosis is regulated or programmed cell death. It differs from necrosis, which
typically involves cell injury, membrane disruption, and inflammation.
8. Which feature is more characteristic of necrosis than apoptosis?
, A. Controlled cellular elimination
B. Minimal inflammatory response
C. Cell membrane disruption and inflammation
D. Normal physiologic turnover
Correct Answer: C. Cell membrane disruption and inflammation
Rationale: Necrosis commonly involves loss of membrane integrity and release of cellular
contents, which can trigger inflammation.
9. Which condition most directly causes cellular hypoxia?
A. Increased oxygen delivery
B. Reduced oxygen availability to tissues
C. Increased ATP production
D. Increased blood oxygen saturation
Correct Answer: B. Reduced oxygen availability to tissues
Rationale: Hypoxia occurs when tissues do not receive adequate oxygen for normal cellular
metabolism.
10. Why is ATP depletion dangerous to cells?
A. It increases normal membrane transport
B. It interferes with energy-dependent cellular processes
C. It prevents all protein synthesis immediately
D. It always causes hyperplasia
Correct Answer: B. It interferes with energy-dependent cellular processes
Rationale: ATP is required for processes such as maintenance of ion gradients. ATP depletion
can impair membrane pumps, causing cellular swelling and dysfunction.
11. Which cellular organelle is primarily responsible for ATP production?
A. Lysosome
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Correct Answer: C. Mitochondrion
Rationale: Mitochondria generate most cellular ATP through oxidative phosphorylation.
12. Which substance can contribute to oxidative cellular injury?
