NSG5140 WEEK 5 MIDTERM EXAM Health Policy, Advocacy &
Political Process in Nursing Practice Questions with Answers &
Rationales
SECTION A: CELLULAR INJURY AND ADAPTATION
Question 1
A patient with chronic hypertension develops left ventricular wall thickening.
Which mechanism best explains this adaptation?
A) Increased myocyte number due to cell division
B) Increased myocyte size due to increased workload
C) Replacement of cardiac cells with fibrous tissue
D) Transformation of cardiac cells into smooth muscle
Answer: B) Increased myocyte size due to increased workload
Rationale: Cardiac myocytes are terminally differentiated cells that respond to
increased workload through hypertrophy (increased cell size), not hyperplasia
(increased cell number). Chronic hypertension creates sustained pressure
overload, stimulating signaling pathways (including PI3K/Akt/mTOR) that enhance
protein synthesis and enlarge individual myocytes. This adaptive response
increases contractile force but can become maladaptive over time, contributing to
heart failure.
Question 2
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) ATP depletion leading to loss of ion homeostasis
Rationale: Hypoxia limits oxidative phosphorylation in mitochondria, leading to
decreased ATP production. The Na⁺/K⁺ ATPase pump requires ATP to maintain ion
,gradients across cell membranes. Its failure causes intracellular sodium
accumulation, water influx, and cellular swelling—the hallmark of hypoxic cellular
injury.
Question 3
Which intracellular signaling pathway is most directly responsible for adaptive
cardiac myocyte hypertrophy in response to mechanical stretch?
A) Activation of the PI3K/Akt/mTOR pathway leading to increased translation
B) Induction of p53-mediated cell cycle arrest and senescence
C) Upregulation of caspases and initiation of apoptosis
D) Activation of the unfolded protein response (UPR) due to ER stress
Answer: A) Activation of the PI3K/Akt/mTOR pathway leading to increased
translation
Rationale: Cardiac myocytes respond to increased workload by undergoing
hypertrophy driven by the PI3K/Akt/mTOR pathway, which enhances protein
synthesis and promotes cell growth. This pathway is mechanotransduced and
represents a critical adaptive mechanism in response to sustained hemodynamic
stress.
Question 4
What is a hallmark of reversible cellular injury?
A) Nuclear pyknosis
B) Failure of ion pumps leading to cell swelling
C) Membrane rupture
D) Lysosomal enzyme release
Answer: B) Failure of ion pumps leading to cell swelling
Rationale: Reversible injury involves cellular swelling due to ion pump failure. If
the insult is removed, the cell can recover. Irreversible injury involves membrane
damage and nuclear changes such as pyknosis. This distinction is clinically
significant—recognizing reversible injury allows for timely intervention before cell
death occurs.
Question 5
,Which organelle is known as the "powerhouse" of the cell due to its role in
oxidative phosphorylation and ATP generation?
A) Nucleus
B) Golgi apparatus
C) Mitochondria
D) Ribosomes
Answer: C) Mitochondria
Rationale: Mitochondria are responsible for oxidative phosphorylation and ATP
production. They contain their own DNA and are critical for cellular energy
metabolism. Mitochondrial dysfunction is central to many disease processes,
making this knowledge essential for understanding pathophysiological
mechanisms.
SECTION B: INFLAMMATION AND IMMUNITY
Question 6
The hallmark of acute inflammation is:
A) Fibrosis
B) Vasodilation and increased vascular permeability
C) Neoplasia
D) Autoantibody formation
Answer: B) Vasodilation and increased vascular permeability
Rationale: Acute inflammation is characterized by vascular changes including
vasodilation (causing redness and heat) and increased vascular permeability
(causing swelling). These changes allow immune cells to reach the site of injury.
Understanding acute inflammation is foundational for recognizing and managing
many clinical conditions.
Question 7
Which mediator is primarily responsible for early vasodilation in acute
inflammation?
, A) Leukotrienes
B) Histamine
C) Prostaglandins
D) Tumor necrosis factor-α
Answer: B) Histamine
Rationale: Histamine released from mast cells causes rapid vasodilation and
increased vascular permeability during acute inflammation. This immediate
response is critical for facilitating immune cell recruitment but also contributes to
the cardinal signs of inflammation.
Question 8
Which type of hypersensitivity is involved in systemic lupus erythematosus
(SLE)?
A) Type I (anaphylactic)
B) Type II (cytotoxic)
C) Type III (immune complex-mediated)
D) Type IV (delayed-type)
Answer: C) Type III (immune complex-mediated)
Rationale: SLE is a Type III hypersensitivity reaction characterized by deposition of
antigen-antibody complexes in tissues, leading to complement activation,
inflammation, and organ damage. Anti-dsDNA antibodies are highly specific for
SLE and are associated with lupus nephritis.
Question 9
Which autoantibody is MOST specific for the diagnosis of systemic lupus
erythematosus (SLE)?
A) Rheumatoid factor
B) Anti-dsDNA antibodies
C) Anti-CCP antibodies
D) Anticentromere antibodies
Answer: B) Anti-dsDNA antibodies
Political Process in Nursing Practice Questions with Answers &
Rationales
SECTION A: CELLULAR INJURY AND ADAPTATION
Question 1
A patient with chronic hypertension develops left ventricular wall thickening.
Which mechanism best explains this adaptation?
A) Increased myocyte number due to cell division
B) Increased myocyte size due to increased workload
C) Replacement of cardiac cells with fibrous tissue
D) Transformation of cardiac cells into smooth muscle
Answer: B) Increased myocyte size due to increased workload
Rationale: Cardiac myocytes are terminally differentiated cells that respond to
increased workload through hypertrophy (increased cell size), not hyperplasia
(increased cell number). Chronic hypertension creates sustained pressure
overload, stimulating signaling pathways (including PI3K/Akt/mTOR) that enhance
protein synthesis and enlarge individual myocytes. This adaptive response
increases contractile force but can become maladaptive over time, contributing to
heart failure.
Question 2
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) ATP depletion leading to loss of ion homeostasis
Rationale: Hypoxia limits oxidative phosphorylation in mitochondria, leading to
decreased ATP production. The Na⁺/K⁺ ATPase pump requires ATP to maintain ion
,gradients across cell membranes. Its failure causes intracellular sodium
accumulation, water influx, and cellular swelling—the hallmark of hypoxic cellular
injury.
Question 3
Which intracellular signaling pathway is most directly responsible for adaptive
cardiac myocyte hypertrophy in response to mechanical stretch?
A) Activation of the PI3K/Akt/mTOR pathway leading to increased translation
B) Induction of p53-mediated cell cycle arrest and senescence
C) Upregulation of caspases and initiation of apoptosis
D) Activation of the unfolded protein response (UPR) due to ER stress
Answer: A) Activation of the PI3K/Akt/mTOR pathway leading to increased
translation
Rationale: Cardiac myocytes respond to increased workload by undergoing
hypertrophy driven by the PI3K/Akt/mTOR pathway, which enhances protein
synthesis and promotes cell growth. This pathway is mechanotransduced and
represents a critical adaptive mechanism in response to sustained hemodynamic
stress.
Question 4
What is a hallmark of reversible cellular injury?
A) Nuclear pyknosis
B) Failure of ion pumps leading to cell swelling
C) Membrane rupture
D) Lysosomal enzyme release
Answer: B) Failure of ion pumps leading to cell swelling
Rationale: Reversible injury involves cellular swelling due to ion pump failure. If
the insult is removed, the cell can recover. Irreversible injury involves membrane
damage and nuclear changes such as pyknosis. This distinction is clinically
significant—recognizing reversible injury allows for timely intervention before cell
death occurs.
Question 5
,Which organelle is known as the "powerhouse" of the cell due to its role in
oxidative phosphorylation and ATP generation?
A) Nucleus
B) Golgi apparatus
C) Mitochondria
D) Ribosomes
Answer: C) Mitochondria
Rationale: Mitochondria are responsible for oxidative phosphorylation and ATP
production. They contain their own DNA and are critical for cellular energy
metabolism. Mitochondrial dysfunction is central to many disease processes,
making this knowledge essential for understanding pathophysiological
mechanisms.
SECTION B: INFLAMMATION AND IMMUNITY
Question 6
The hallmark of acute inflammation is:
A) Fibrosis
B) Vasodilation and increased vascular permeability
C) Neoplasia
D) Autoantibody formation
Answer: B) Vasodilation and increased vascular permeability
Rationale: Acute inflammation is characterized by vascular changes including
vasodilation (causing redness and heat) and increased vascular permeability
(causing swelling). These changes allow immune cells to reach the site of injury.
Understanding acute inflammation is foundational for recognizing and managing
many clinical conditions.
Question 7
Which mediator is primarily responsible for early vasodilation in acute
inflammation?
, A) Leukotrienes
B) Histamine
C) Prostaglandins
D) Tumor necrosis factor-α
Answer: B) Histamine
Rationale: Histamine released from mast cells causes rapid vasodilation and
increased vascular permeability during acute inflammation. This immediate
response is critical for facilitating immune cell recruitment but also contributes to
the cardinal signs of inflammation.
Question 8
Which type of hypersensitivity is involved in systemic lupus erythematosus
(SLE)?
A) Type I (anaphylactic)
B) Type II (cytotoxic)
C) Type III (immune complex-mediated)
D) Type IV (delayed-type)
Answer: C) Type III (immune complex-mediated)
Rationale: SLE is a Type III hypersensitivity reaction characterized by deposition of
antigen-antibody complexes in tissues, leading to complement activation,
inflammation, and organ damage. Anti-dsDNA antibodies are highly specific for
SLE and are associated with lupus nephritis.
Question 9
Which autoantibody is MOST specific for the diagnosis of systemic lupus
erythematosus (SLE)?
A) Rheumatoid factor
B) Anti-dsDNA antibodies
C) Anti-CCP antibodies
D) Anticentromere antibodies
Answer: B) Anti-dsDNA antibodies
