NSG5140 Week 5 Midterm Exam Due 30th
September Complete Actual Exam Questions 100%
Pass Guaranteed | Graded A
SECTION 1: CELLULAR ADAPTATION AND INJURY
**Question 1**
A patient with chronic hypertension develops left ventricular wall thickening. Which mechanism
BEST explains this adaptation?
A) Hyperplasia of cardiac muscle cells
B) Hypertrophy of cardiac muscle cells
C) Metaplasia of cardiac tissue
D) Dysplasia of the myocardium
**Answer: B**
**Rationale:** Hypertension increases the workload on the left ventricle, leading to
hypertrophy—an increase in cell size without an increase in cell number. Cardiac muscle cells
are terminally differentiated and cannot undergo hyperplasia. Metaplasia is the replacement of
one differentiated cell type with another, and dysplasia refers to abnormal cellular growth,
neither of which are adaptive responses in the heart.
---
**Question 2**
Which cellular organelle is primarily responsible for ATP production through oxidative
phosphorylation?
A) Ribosome
,B) Golgi apparatus
C) Mitochondria
D) Endoplasmic reticulum
**Answer: C**
**Rationale:** Mitochondria are the primary site of ATP production through oxidative
phosphorylation. They contain the electron transport chain and ATP synthase, which generate
ATP from ADP and inorganic phosphate.
---
**Question 3**
Which of the following is the primary mechanism of cellular injury in hypoxic conditions?
A) DNA mutation
B) ATP depletion leading to loss of ion homeostasis
C) Free radical formation
D) Protein misfolding
**Answer: B**
**Rationale:** Hypoxia limits oxidative phosphorylation, leading to decreased ATP production.
The Na⁺/K⁺ ATPase pump requires ATP to maintain ion gradients; failure of this pump causes
intracellular sodium accumulation, water influx, and cellular swelling. This is the hallmark of
hypoxic cellular injury.
---
**Question 4**
,A chronic smoker's bronchial epithelium changes from ciliated columnar to stratified squamous
epithelium. This change is best described as:
A) Dysplasia
B) Metaplasia
C) Hyperplasia
D) Anaplasia
**Answer: B**
**Rationale:** Metaplasia is a reversible change where one differentiated cell type is replaced
by another more resistant cell type. In smokers, the normal pseudostratified ciliated columnar
epithelium is replaced by stratified squamous epithelium as a protective adaptation to chronic
irritation.
---
**Question 5**
Which cellular adaptation is characterized by a decrease in cell size and function due to
decreased workload or loss of innervation?
A) Hypertrophy
B) Hyperplasia
C) Atrophy
D) Metaplasia
**Answer: C**
**Rationale:** Atrophy is a reduction in cell size and function resulting from disuse,
denervation, ischemia, malnutrition, or decreased hormonal stimulation.
, ---
**Question 6**
A Pap smear shows disordered epithelial cell growth with variation in size, shape, and nuclear
appearance, but cells have not invaded the basement membrane. This is best described as:
A) Metaplasia
B) Dysplasia
C) Hyperplasia
D) Neoplasia
**Answer: B**
**Rationale:** Dysplasia is characterized by disordered cellular growth with pleomorphism
(variation in size and shape), hyperchromatic nuclei, and loss of normal architectural
organization. It is potentially reversible but may progress to carcinoma in situ.
---
**Question 7**
A pathologist examining a myocardial infarction under the microscope notes preserved tissue
architecture with loss of nuclei and eosinophilic cytoplasm. This type of necrosis is:
A) Liquefactive necrosis
B) Coagulative necrosis
C) Caseous necrosis
D) Fat necrosis
**Answer: B**
September Complete Actual Exam Questions 100%
Pass Guaranteed | Graded A
SECTION 1: CELLULAR ADAPTATION AND INJURY
**Question 1**
A patient with chronic hypertension develops left ventricular wall thickening. Which mechanism
BEST explains this adaptation?
A) Hyperplasia of cardiac muscle cells
B) Hypertrophy of cardiac muscle cells
C) Metaplasia of cardiac tissue
D) Dysplasia of the myocardium
**Answer: B**
**Rationale:** Hypertension increases the workload on the left ventricle, leading to
hypertrophy—an increase in cell size without an increase in cell number. Cardiac muscle cells
are terminally differentiated and cannot undergo hyperplasia. Metaplasia is the replacement of
one differentiated cell type with another, and dysplasia refers to abnormal cellular growth,
neither of which are adaptive responses in the heart.
---
**Question 2**
Which cellular organelle is primarily responsible for ATP production through oxidative
phosphorylation?
A) Ribosome
,B) Golgi apparatus
C) Mitochondria
D) Endoplasmic reticulum
**Answer: C**
**Rationale:** Mitochondria are the primary site of ATP production through oxidative
phosphorylation. They contain the electron transport chain and ATP synthase, which generate
ATP from ADP and inorganic phosphate.
---
**Question 3**
Which of the following is the primary mechanism of cellular injury in hypoxic conditions?
A) DNA mutation
B) ATP depletion leading to loss of ion homeostasis
C) Free radical formation
D) Protein misfolding
**Answer: B**
**Rationale:** Hypoxia limits oxidative phosphorylation, leading to decreased ATP production.
The Na⁺/K⁺ ATPase pump requires ATP to maintain ion gradients; failure of this pump causes
intracellular sodium accumulation, water influx, and cellular swelling. This is the hallmark of
hypoxic cellular injury.
---
**Question 4**
,A chronic smoker's bronchial epithelium changes from ciliated columnar to stratified squamous
epithelium. This change is best described as:
A) Dysplasia
B) Metaplasia
C) Hyperplasia
D) Anaplasia
**Answer: B**
**Rationale:** Metaplasia is a reversible change where one differentiated cell type is replaced
by another more resistant cell type. In smokers, the normal pseudostratified ciliated columnar
epithelium is replaced by stratified squamous epithelium as a protective adaptation to chronic
irritation.
---
**Question 5**
Which cellular adaptation is characterized by a decrease in cell size and function due to
decreased workload or loss of innervation?
A) Hypertrophy
B) Hyperplasia
C) Atrophy
D) Metaplasia
**Answer: C**
**Rationale:** Atrophy is a reduction in cell size and function resulting from disuse,
denervation, ischemia, malnutrition, or decreased hormonal stimulation.
, ---
**Question 6**
A Pap smear shows disordered epithelial cell growth with variation in size, shape, and nuclear
appearance, but cells have not invaded the basement membrane. This is best described as:
A) Metaplasia
B) Dysplasia
C) Hyperplasia
D) Neoplasia
**Answer: B**
**Rationale:** Dysplasia is characterized by disordered cellular growth with pleomorphism
(variation in size and shape), hyperchromatic nuclei, and loss of normal architectural
organization. It is potentially reversible but may progress to carcinoma in situ.
---
**Question 7**
A pathologist examining a myocardial infarction under the microscope notes preserved tissue
architecture with loss of nuclei and eosinophilic cytoplasm. This type of necrosis is:
A) Liquefactive necrosis
B) Coagulative necrosis
C) Caseous necrosis
D) Fat necrosis
**Answer: B**
