BIOL 331 | BIOL331 Module 1: Pathophysiology
Updated and Latest Questions and Correct
Answers with Rationale - Portage Learning
1. A patient presents with a thickened left ventricular wall due to long-standing hypertension.
Which cellular adaptation is occurring?
A. Hyperplasia
B. Metaplasia
C. Atrophy
D. Hypertrophy
Correct Answer: D
Explanation: Hypertrophy is an increase in cell size resulting in an increase in the size of
the organ, often due to increased workload. Pathophysiology Module 1 focuses on how cells
adapt to stress and the mechanisms leading to cellular injury and death. Understanding the
difference between physiological adaptations like hypertrophy and pathological changes
like dysplasia is crucial for clinical diagnosis. The inflammatory response serves as a
protective mechanism but can cause tissue damage if it becomes chronic or systemic. This
question set explores these foundational concepts to prepare students for analyzing
complex disease states in clinical practice.
2. Which process describes the replacement of one adult cell type by another adult cell type,
such as in the esophagus of a patient with chronic acid reflux?
A. Metaplasia
B. Hypertrophy
C. Dysplasia
D. Atrophy
Correct Answer: A
Explanation: Metaplasia is a reversible change in which one adult cell type is replaced by
another cell type that is better able to withstand the adverse environment. Dysplasia is
deranged growth, while atrophy is shrinkage.
3. A 70-year-old male with a history of smoking shows abnormal, disorganized cell growth in
a bronchial biopsy. This is best described as:
A. Hyperplasia
B. Dysplasia
C. Metaplasia
, D. Anaplasia
Correct Answer: B
Explanation: Dysplasia refers to abnormal changes in the size, shape, and organization of
mature cells. It is often a precursor to cancer but is not yet cancer itself (which would be
neoplasia or anaplasia).
4. What is the most common cause of cellular injury in clinical practice?
A. Free radical damage
B. Chemical agents
C. Hypoxia
D. Genetic defects
Correct Answer: C
Explanation: Hypoxia, or lack of sufficient oxygen, is the most common cause of cellular
injury. It typically results from ischemia, which is a reduced blood supply to tissues.
5. During hypoxic injury, why does the cell swell?
A. Increased protein synthesis
B. Excessive intake of glucose
C. Failure of the Na+/K+ ATPase pump
D. Release of lysosomal enzymes
Correct Answer: C
Explanation: When ATP levels drop due to hypoxia, the Na+/K+ pump fails. Sodium
accumulates inside the cell, causing water to follow by osmosis, leading to cellular swelling.
6. Which type of cell death involves cellular dissolution and is always associated with
inflammation?
A. Necrosis
B. Autophagy
C. Apoptosis
D. Mitosis
Correct Answer: A
Explanation: Necrosis is accidental cell death characterized by membrane rupture and
leakage of cellular contents, which triggers an inflammatory response. Apoptosis is
programmed and typically silent.
Updated and Latest Questions and Correct
Answers with Rationale - Portage Learning
1. A patient presents with a thickened left ventricular wall due to long-standing hypertension.
Which cellular adaptation is occurring?
A. Hyperplasia
B. Metaplasia
C. Atrophy
D. Hypertrophy
Correct Answer: D
Explanation: Hypertrophy is an increase in cell size resulting in an increase in the size of
the organ, often due to increased workload. Pathophysiology Module 1 focuses on how cells
adapt to stress and the mechanisms leading to cellular injury and death. Understanding the
difference between physiological adaptations like hypertrophy and pathological changes
like dysplasia is crucial for clinical diagnosis. The inflammatory response serves as a
protective mechanism but can cause tissue damage if it becomes chronic or systemic. This
question set explores these foundational concepts to prepare students for analyzing
complex disease states in clinical practice.
2. Which process describes the replacement of one adult cell type by another adult cell type,
such as in the esophagus of a patient with chronic acid reflux?
A. Metaplasia
B. Hypertrophy
C. Dysplasia
D. Atrophy
Correct Answer: A
Explanation: Metaplasia is a reversible change in which one adult cell type is replaced by
another cell type that is better able to withstand the adverse environment. Dysplasia is
deranged growth, while atrophy is shrinkage.
3. A 70-year-old male with a history of smoking shows abnormal, disorganized cell growth in
a bronchial biopsy. This is best described as:
A. Hyperplasia
B. Dysplasia
C. Metaplasia
, D. Anaplasia
Correct Answer: B
Explanation: Dysplasia refers to abnormal changes in the size, shape, and organization of
mature cells. It is often a precursor to cancer but is not yet cancer itself (which would be
neoplasia or anaplasia).
4. What is the most common cause of cellular injury in clinical practice?
A. Free radical damage
B. Chemical agents
C. Hypoxia
D. Genetic defects
Correct Answer: C
Explanation: Hypoxia, or lack of sufficient oxygen, is the most common cause of cellular
injury. It typically results from ischemia, which is a reduced blood supply to tissues.
5. During hypoxic injury, why does the cell swell?
A. Increased protein synthesis
B. Excessive intake of glucose
C. Failure of the Na+/K+ ATPase pump
D. Release of lysosomal enzymes
Correct Answer: C
Explanation: When ATP levels drop due to hypoxia, the Na+/K+ pump fails. Sodium
accumulates inside the cell, causing water to follow by osmosis, leading to cellular swelling.
6. Which type of cell death involves cellular dissolution and is always associated with
inflammation?
A. Necrosis
B. Autophagy
C. Apoptosis
D. Mitosis
Correct Answer: A
Explanation: Necrosis is accidental cell death characterized by membrane rupture and
leakage of cellular contents, which triggers an inflammatory response. Apoptosis is
programmed and typically silent.
