TEST BANK For Porth's Pathophysiology Concepts
of Altered Health States Exam Questions and
Correct Answers (Verified Answers) Plus Rationale
2027 Q&A| Instant Download Pdf
1. A patient develops a condition in which cells are unable to
maintain normal function because of inadequate oxygen delivery.
Which cellular process is most directly affected first?
A. DNA replication
B. Oxidative phosphorylation
C. Protein synthesis in the nucleus
D. Lysosomal enzyme production
Answer: B. Oxidative phosphorylation
Rationale: Oxidative phosphorylation occurs in the mitochondria and
depends on adequate oxygen to generate ATP efficiently. When oxygen
delivery is impaired, ATP production falls, compromising energy-
dependent cellular functions such as membrane transport and ion
balance.
, 2. Which finding best represents cellular hypertrophy?
A. An increase in the number of cardiac muscle cells
B. An increase in the size of individual cardiac muscle cells
C. Replacement of cardiac muscle with connective tissue
D. Destruction of cardiac muscle cells
Answer: B. An increase in the size of individual cardiac muscle cells
Rationale: Hypertrophy is an increase in cell size that causes
enlargement of the affected tissue or organ. Cardiac muscle cells
commonly undergo hypertrophy in response to chronic increased
workload because mature cardiac myocytes have limited ability to
divide.
3. A patient has prolonged immobilization of a limb. Which cellular
adaptation is most likely to occur?
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
Answer: C. Atrophy
,Rationale: Atrophy is a reduction in cell size and functional capacity that
can result from decreased workload, inadequate nutrition, loss of nerve
supply, or reduced blood supply. Immobilization decreases muscle
workload and promotes skeletal muscle atrophy.
4. Which statement best describes hyperplasia?
A. Increase in individual cell size
B. Decrease in cellular volume
C. Increase in the number of cells
D. Conversion of one mature cell type into another
Answer: C. Increase in the number of cells
Rationale: Hyperplasia occurs when cells proliferate, resulting in an
increased number of cells within a tissue. It can be physiologic, such as
hormonal proliferation of breast tissue during pregnancy, or pathologic,
such as excessive endometrial proliferation.
5. A smoker develops replacement of normal respiratory epithelial
cells with a different type of epithelial cell better able to tolerate
chronic irritation. Which adaptation is this?
, A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Answer: C. Metaplasia
Rationale: Metaplasia is a reversible change in which one differentiated
cell type is replaced by another differentiated cell type. It is often an
adaptive response to chronic irritation, although persistent injury may
increase the risk of further abnormal cellular changes.
6. Which cellular change is most strongly associated with disordered
cell growth and an increased risk of malignancy?
A. Dysplasia
B. Atrophy
C. Physiologic hypertrophy
D. Simple hyperplasia
Answer: A. Dysplasia
Rationale: Dysplasia involves abnormal cellular size, shape,
organization, and maturation. Although dysplasia is not synonymous
with cancer, significant dysplastic changes may represent a
of Altered Health States Exam Questions and
Correct Answers (Verified Answers) Plus Rationale
2027 Q&A| Instant Download Pdf
1. A patient develops a condition in which cells are unable to
maintain normal function because of inadequate oxygen delivery.
Which cellular process is most directly affected first?
A. DNA replication
B. Oxidative phosphorylation
C. Protein synthesis in the nucleus
D. Lysosomal enzyme production
Answer: B. Oxidative phosphorylation
Rationale: Oxidative phosphorylation occurs in the mitochondria and
depends on adequate oxygen to generate ATP efficiently. When oxygen
delivery is impaired, ATP production falls, compromising energy-
dependent cellular functions such as membrane transport and ion
balance.
, 2. Which finding best represents cellular hypertrophy?
A. An increase in the number of cardiac muscle cells
B. An increase in the size of individual cardiac muscle cells
C. Replacement of cardiac muscle with connective tissue
D. Destruction of cardiac muscle cells
Answer: B. An increase in the size of individual cardiac muscle cells
Rationale: Hypertrophy is an increase in cell size that causes
enlargement of the affected tissue or organ. Cardiac muscle cells
commonly undergo hypertrophy in response to chronic increased
workload because mature cardiac myocytes have limited ability to
divide.
3. A patient has prolonged immobilization of a limb. Which cellular
adaptation is most likely to occur?
A. Hyperplasia
B. Hypertrophy
C. Atrophy
D. Metaplasia
Answer: C. Atrophy
,Rationale: Atrophy is a reduction in cell size and functional capacity that
can result from decreased workload, inadequate nutrition, loss of nerve
supply, or reduced blood supply. Immobilization decreases muscle
workload and promotes skeletal muscle atrophy.
4. Which statement best describes hyperplasia?
A. Increase in individual cell size
B. Decrease in cellular volume
C. Increase in the number of cells
D. Conversion of one mature cell type into another
Answer: C. Increase in the number of cells
Rationale: Hyperplasia occurs when cells proliferate, resulting in an
increased number of cells within a tissue. It can be physiologic, such as
hormonal proliferation of breast tissue during pregnancy, or pathologic,
such as excessive endometrial proliferation.
5. A smoker develops replacement of normal respiratory epithelial
cells with a different type of epithelial cell better able to tolerate
chronic irritation. Which adaptation is this?
, A. Atrophy
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Answer: C. Metaplasia
Rationale: Metaplasia is a reversible change in which one differentiated
cell type is replaced by another differentiated cell type. It is often an
adaptive response to chronic irritation, although persistent injury may
increase the risk of further abnormal cellular changes.
6. Which cellular change is most strongly associated with disordered
cell growth and an increased risk of malignancy?
A. Dysplasia
B. Atrophy
C. Physiologic hypertrophy
D. Simple hyperplasia
Answer: A. Dysplasia
Rationale: Dysplasia involves abnormal cellular size, shape,
organization, and maturation. Although dysplasia is not synonymous
with cancer, significant dysplastic changes may represent a
