RECENT EXAM 2026|2027 ACTUAL COMPLETE REAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
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Which cellular response occurs when a tissue increases the size of its
existing cells in response to increased workload?
A. Hypertrophy
B. Hyperplasia
C. Metaplasia
D. Dysplasia
Answer: A. Hypertrophy
Rationale: Hypertrophy is an increase in individual cell size, resulting
in enlargement of an organ or tissue. It commonly occurs in skeletal
muscle with resistance training and in cardiac muscle in response to
chronic hypertension. Hyperplasia involves an increase in cell number,
while metaplasia involves the replacement of one mature cell type with
another.
A patient with chronic gastroesophageal reflux develops replacement
of the normal esophageal squamous epithelium with columnar
epithelium. Which cellular adaptation is occurring?
A. Atrophy
,B. Metaplasia
C. Hypertrophy
D. Necrosis
Answer: B. Metaplasia
Rationale: Metaplasia is a potentially reversible adaptation in which
one differentiated cell type is replaced by another better able to
tolerate a persistent stressor. In chronic reflux, the esophageal lining
may change to a columnar type, a condition associated with Barrett's
esophagus. Continued exposure to injury can increase the risk of
dysplasia and esophageal adenocarcinoma.
Which finding is most characteristic of reversible cellular injury
caused by inadequate oxygen delivery?
A. Immediate cellular rupture
B. Permanent destruction of nuclear DNA
C. Cellular swelling caused by impaired ion transport
D. Complete dissolution of the cell membrane
Answer: C. Cellular swelling caused by impaired ion transport
Rationale: Hypoxia reduces oxidative phosphorylation and ATP
production. ATP depletion impairs energy-dependent sodium-
potassium pumps, causing sodium and water to accumulate inside
cells. This swelling may resolve if oxygen delivery is restored before
irreversible damage occurs. Severe or prolonged hypoxia can progress
to irreversible injury and cell death.
,Which type of cell death is characterized by cell swelling, membrane
disruption, and the release of intracellular contents that can trigger
inflammation?
A. Physiological apoptosis
B. Cellular differentiation
C. Adaptive hyperplasia
D. Necrosis
Answer: D. Necrosis
Rationale: Necrosis is an uncontrolled form of cell death associated
with severe injury, loss of membrane integrity, and leakage of cellular
contents into surrounding tissues. These contents provoke
inflammation. Apoptosis, in contrast, is a regulated process that
typically removes cells without causing substantial inflammation.
A patient develops a myocardial infarction after a coronary artery
becomes occluded. Which type of necrosis is most commonly found in
the affected heart muscle?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Fat necrosis
D. Caseous necrosis
Answer: A. Coagulative necrosis
, Rationale: Coagulative necrosis is typical of ischemic injury in most
solid organs, including the myocardium. The structural outlines of
dead cells remain temporarily preserved because structural proteins
and enzymes become denatured. The major exception is ischemic
injury to the brain, where liquefactive necrosis is typical.
Which statement best describes apoptosis?
A. It always causes extensive tissue inflammation.
B. It is a regulated process of programmed cell death.
C. It occurs only when bacteria invade a tissue.
D. It results exclusively from severe oxygen deprivation.
Answer: B. It is a regulated process of programmed cell death.
Rationale: Apoptosis removes unwanted, damaged, or potentially
harmful cells through an organized molecular process involving
caspases. It is important during embryonic development, normal tissue
turnover, and the elimination of cells with irreparable DNA damage.
Unlike necrosis, apoptosis generally preserves membrane integrity
during the early stages and produces little inflammation.
Which mediator is primarily responsible for increasing vascular
permeability during the early stages of acute inflammation?
A. Albumin
B. Hemoglobin
C. Histamine