NR 507 ADVANCED PATHOPHYSIOLOGY
MIDTERM EXAM 300 MULTIPLE-CHOICE
QUESTIONS AND ANSWERS WITH
DETAILED RATIONALES LATEST
UPDATE THIS YEAR
Question 1
Which cell type is the primary "first responder" in the innate immune system?
A. Macrophages
B. T lymphocytes
C. Neutrophils
D. Dendritic cells
Correct Answer: C. Neutrophils
Rationale: Neutrophils are the earliest responders to acute inflammation, rapidly
migrating to infection sites via chemotaxis. Macrophages arrive later for
phagocytosis; T lymphocytes are part of adaptive immunity; dendritic cells
primarily function as antigen-presenting cells.
---
Question 2
,A 68-year-old male with a history of chronic hypertension exhibits thickening of
the left ventricular myocardium. This change is best described as which type of
cellular adaptation?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy
Rationale: Myocardial cells are terminally differentiated and cannot divide to form
new cells. Therefore, the heart adapts to increased workload or high systemic
blood pressure exclusively through hypertrophy, which is an increase in individual
cell size.
---
Question 3
A 55-year-old chronic smoker undergoes bronchoscopy. The biopsy reveals that
the normal ciliated columnar epithelium of the airways has been replaced by
stratified squamous epithelium. What is this adaptation called?
A. Anaplasia
B. Atrophy
C. Metaplasia
D. Hyperplasia
Correct Answer: C. Metaplasia
,Rationale: Metaplasia is the reversible replacement of one mature cell type by
another mature cell type, often as an adaptive response to chronic irritation like
cigarette smoke.
---
Question 4
During an autopsy, a pathologist notes a distinct area of tissue necrosis in the brain
cortex that appears soft, liquefied, and encapsulated by a cyst. What type of
necrosis is this?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B. Liquefactive necrosis
Rationale: Liquefactive necrosis occurs primarily in the brain and central nervous
system due to ischemic injury. It is characterized by the action of hydrolytic
enzymes that digest dead tissue into a liquid mass.
---
Question 5
A patient is diagnosed with a preinvasive epithelial tumor of the cervix that has not
breached the basement membrane. How is this lesion classified?
A. Invasive adenocarcinoma
B. Carcinoma in situ
, C. Benign adenoma
D. Metastatic sarcoma
Correct Answer: B. Carcinoma in situ
Rationale: Carcinoma in situ (CIS) refers to early-stage, localized epithelial tumors
that have not broken through the local basement membrane.
---
Question 6
Which cellular component is the primary site for the production of cellular energy
(ATP) via oxidative phosphorylation?
A. Lysosome
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Correct Answer: C. Mitochondria
Rationale: The mitochondria function as the powerhouse of the cell, utilizing
oxygen to generate ATP through the electron transport chain.
---
Question 7
MIDTERM EXAM 300 MULTIPLE-CHOICE
QUESTIONS AND ANSWERS WITH
DETAILED RATIONALES LATEST
UPDATE THIS YEAR
Question 1
Which cell type is the primary "first responder" in the innate immune system?
A. Macrophages
B. T lymphocytes
C. Neutrophils
D. Dendritic cells
Correct Answer: C. Neutrophils
Rationale: Neutrophils are the earliest responders to acute inflammation, rapidly
migrating to infection sites via chemotaxis. Macrophages arrive later for
phagocytosis; T lymphocytes are part of adaptive immunity; dendritic cells
primarily function as antigen-presenting cells.
---
Question 2
,A 68-year-old male with a history of chronic hypertension exhibits thickening of
the left ventricular myocardium. This change is best described as which type of
cellular adaptation?
A. Hyperplasia
B. Hypertrophy
C. Metaplasia
D. Dysplasia
Correct Answer: B. Hypertrophy
Rationale: Myocardial cells are terminally differentiated and cannot divide to form
new cells. Therefore, the heart adapts to increased workload or high systemic
blood pressure exclusively through hypertrophy, which is an increase in individual
cell size.
---
Question 3
A 55-year-old chronic smoker undergoes bronchoscopy. The biopsy reveals that
the normal ciliated columnar epithelium of the airways has been replaced by
stratified squamous epithelium. What is this adaptation called?
A. Anaplasia
B. Atrophy
C. Metaplasia
D. Hyperplasia
Correct Answer: C. Metaplasia
,Rationale: Metaplasia is the reversible replacement of one mature cell type by
another mature cell type, often as an adaptive response to chronic irritation like
cigarette smoke.
---
Question 4
During an autopsy, a pathologist notes a distinct area of tissue necrosis in the brain
cortex that appears soft, liquefied, and encapsulated by a cyst. What type of
necrosis is this?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Caseous necrosis
D. Fat necrosis
Correct Answer: B. Liquefactive necrosis
Rationale: Liquefactive necrosis occurs primarily in the brain and central nervous
system due to ischemic injury. It is characterized by the action of hydrolytic
enzymes that digest dead tissue into a liquid mass.
---
Question 5
A patient is diagnosed with a preinvasive epithelial tumor of the cervix that has not
breached the basement membrane. How is this lesion classified?
A. Invasive adenocarcinoma
B. Carcinoma in situ
, C. Benign adenoma
D. Metastatic sarcoma
Correct Answer: B. Carcinoma in situ
Rationale: Carcinoma in situ (CIS) refers to early-stage, localized epithelial tumors
that have not broken through the local basement membrane.
---
Question 6
Which cellular component is the primary site for the production of cellular energy
(ATP) via oxidative phosphorylation?
A. Lysosome
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Correct Answer: C. Mitochondria
Rationale: The mitochondria function as the powerhouse of the cell, utilizing
oxygen to generate ATP through the electron transport chain.
---
Question 7
