NURS 231/NURS231 Module 1 V1 |
Pathophysiology Q&A with Rationale |
Portage Learning
1. Which cellular component is responsible for the synthesis of proteins destined for
secretion or membrane insertion?
A. Rough Endoplasmic Reticulum
B. Smooth Endoplasmic Reticulum
C. Lysosomes
D. Golgi Apparatus
Correct Answer: A
Rationale: The Rough Endoplasmic Reticulum (RER) is studded with ribosomes, which are
the sites of protein synthesis. Proteins produced here are typically intended for secretion
from the cell or for use within the cell membrane. This distinction is critical in
understanding how cellular products are managed and distributed within the body.
2. In response to increased workload, such as weightlifting, skeletal muscle cells undergo
which type of adaptation?
A. Hypertrophy
B. Metaplasia
C. Hyperplasia
,D. Atrophy
Correct Answer: A
Rationale: Hypertrophy involves an increase in the size of individual cells, which leads to
an increase in the size of the organ or tissue. Unlike hyperplasia, hypertrophy does not
involve the creation of new cells but rather an enlargement of existing ones. This is a
common physiological response to increased mechanical demand or hormonal stimulation.
3. Which cellular adaptation is characterized by the replacement of one adult cell type by
another, often in response to chronic irritation?
A. Dysplasia
B. Metaplasia
C. Atrophy
D. Hypertrophy
Correct Answer: B
Rationale: Metaplasia is a reversible change where one mature cell type is replaced by
another mature cell type that is better suited to handle a specific stressor. A classic example
is the change in respiratory epithelium in smokers, where columnar cells become
squamous cells. While adaptive, this process can predispose the tissue to malignant
transformations if the irritant persists.
, 4. A patient’s biopsy reveals ‘disordered growth’ and a loss of cellular uniformity. Which term
best describes this finding?
A. Metaplasia
B. Dysplasia
C. Hyperplasia
D. Atrophy
Correct Answer: B
Rationale: Dysplasia refers to abnormal changes in the size, shape, and organization of
mature cells. It is often considered a precancerous condition because it represents a loss of
control over cell growth and differentiation. Close clinical monitoring is required as
dysplasia can progress to neoplasia.
5. What is the most common cause of cellular injury in clinical practice?
A. Chemical agents
B. Genetic defects
C. Infectious agents
D. Hypoxia
Correct Answer: D
Rationale: Hypoxia, or oxygen deprivation, is the leading cause of cell injury and death. It
interferes with aerobic oxidative respiration, leading to a decrease in ATP production.
Pathophysiology Q&A with Rationale |
Portage Learning
1. Which cellular component is responsible for the synthesis of proteins destined for
secretion or membrane insertion?
A. Rough Endoplasmic Reticulum
B. Smooth Endoplasmic Reticulum
C. Lysosomes
D. Golgi Apparatus
Correct Answer: A
Rationale: The Rough Endoplasmic Reticulum (RER) is studded with ribosomes, which are
the sites of protein synthesis. Proteins produced here are typically intended for secretion
from the cell or for use within the cell membrane. This distinction is critical in
understanding how cellular products are managed and distributed within the body.
2. In response to increased workload, such as weightlifting, skeletal muscle cells undergo
which type of adaptation?
A. Hypertrophy
B. Metaplasia
C. Hyperplasia
,D. Atrophy
Correct Answer: A
Rationale: Hypertrophy involves an increase in the size of individual cells, which leads to
an increase in the size of the organ or tissue. Unlike hyperplasia, hypertrophy does not
involve the creation of new cells but rather an enlargement of existing ones. This is a
common physiological response to increased mechanical demand or hormonal stimulation.
3. Which cellular adaptation is characterized by the replacement of one adult cell type by
another, often in response to chronic irritation?
A. Dysplasia
B. Metaplasia
C. Atrophy
D. Hypertrophy
Correct Answer: B
Rationale: Metaplasia is a reversible change where one mature cell type is replaced by
another mature cell type that is better suited to handle a specific stressor. A classic example
is the change in respiratory epithelium in smokers, where columnar cells become
squamous cells. While adaptive, this process can predispose the tissue to malignant
transformations if the irritant persists.
, 4. A patient’s biopsy reveals ‘disordered growth’ and a loss of cellular uniformity. Which term
best describes this finding?
A. Metaplasia
B. Dysplasia
C. Hyperplasia
D. Atrophy
Correct Answer: B
Rationale: Dysplasia refers to abnormal changes in the size, shape, and organization of
mature cells. It is often considered a precancerous condition because it represents a loss of
control over cell growth and differentiation. Close clinical monitoring is required as
dysplasia can progress to neoplasia.
5. What is the most common cause of cellular injury in clinical practice?
A. Chemical agents
B. Genetic defects
C. Infectious agents
D. Hypoxia
Correct Answer: D
Rationale: Hypoxia, or oxygen deprivation, is the leading cause of cell injury and death. It
interferes with aerobic oxidative respiration, leading to a decrease in ATP production.
