NRSG 2350 PATHOPHYSIOLOGY FINAL
EXAM PREP GRADE A+ RESOURCE WITH
DETAILED CORRECT ANSWERS WITH
RATIONALES | CORRECT VERIFIED
ANSWERS INCLUDED | 100% PASS
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1. A 45-year-old female presents to the clinic complaining of
progressive, symmetrical stiffness and swelling in the small
joints of her hands and wrists over the past nine months. She
notes that the stiffness is most severe in the morning, lasting
for more than an hour after she wakes up. Physical examination
reveals warmth, erythema, and soft-tissue swelling over the
bilateral metacarpophalangeal (MCP) and proximal
interphalangeal (PIP) joints. Laboratory analysis is notable for
elevated rheumatoid factor (RF) and anti-cyclic citrullinated
peptide (anti-CCP) antibodies. Which of the following
pathophysiological structures forms within the joint space and
drives the destruction of cartilage and bone in this disease?
A. A pannus, which is an abnormal layer of fibrovascular
granulation tissue containing inflammatory cells that invades
the joint cartilage
B. Hard, dense osteophytes forming at the joint margins due to
mechanical wear and tear of articular cartilage
C. Tophi, consisting of large, crystalline aggregates of
monosodium urate monohydrate deposited in the periarticular
tissues
D. A thick fibrous capsule lined with benign epithelial cells that
secretes excessively high volumes of serous fluid
Correct Answer: A. A pannus, which is an abnormal
layer of fibrovascular granulation tissue containing
,inflammatory cells that invades the joint cartilage
Rationale: Rheumatoid arthritis is a chronic autoimmune
disease characterized by symmetric inflammatory synovitis.
Activated T cells, B cells, and macrophages infiltrate the
synovium, causing chronic inflammation and hyperplastic
proliferation. This leads to the formation of a pannus—an
abnormal layer of vascularized granulation tissue containing
inflammatory cells. The pannus releases destructive enzymes
like collagenases and metalloproteinases, which erode the
articular cartilage and underlying bone.
2. A 52-year-old male with a history of chronic hypertension
and poorly controlled type 2 diabetes mellitus presents to the
emergency department complaining of sudden onset, severe,
crushing substernal chest pain that radiates to his left shoulder
and jaw. The pain began approximately 45 minutes ago while
he was mowing his lawn and is not relieved by rest or
sublingual nitroglycerin. Laboratory evaluation reveals
significantly elevated cardiac troponin I levels, and an
electrocardiogram shows ST-segment elevation in leads V1
through V4. Which of the following cellular processes
represents the initial, primary consequence of ischemia in this
patient's myocardial tissue?
A. Enhanced aerobic glycolysis leading to severe intracellular
alkalosis and structural protein degradation
B. Failure of the adenosine triphosphate (ATP)-dependent
sodium-potassium pump leading to intracellular sodium
accumulation and cellular swelling
C. Decreased intracellular calcium concentrations due to the
hyperactivity of plasma membrane calcium-ATPase pumps
D. Rapid activation of endogenous antioxidants that
successfully neutralizes harmful reactive oxygen species within
the mitochondria
,Correct Answer: B. Failure of the adenosine
triphosphate (ATP)-dependent sodium-potassium
pump leading to intracellular sodium accumulation
and cellular swelling
Rationale: Ischemia rapidly depletes cellular adenosine
triphosphate (ATP) due to the cessation of aerobic metabolism
and oxidative phosphorylation. Without sufficient ATP, the
plasma membrane's sodium-potassium ATPase pump fails,
allowing sodium to accumulate inside the cell and potassium
to exit. The osmotic gradient created by intracellular sodium
retention pulls water into the cell, resulting in acute cellular
swelling, which is one of the earliest morphological signs of
ischemic injury.
3. A 64-year-old female with a 40 pack-year smoking history
presents to the pulmonology clinic with a chronic, productive
cough and progressive exertional dyspnea over the past three
years. A bronchoscopy is performed, and a tissue biopsy of her
bronchial epithelium is obtained for histological evaluation.
The pathology report indicates that the normal pseudostratified
ciliated columnar epithelial cells have been completely replaced
by stratified squamous epithelial cells. Which of the following
statements best describes this cellular adaptation?
A. It represents a highly malignant and irreversible neoplastic
transformation that will rapidly invade the basement
membrane.
B. It is a reversible alteration known as metaplasia, where one
mature cell type is replaced by another mature cell type better
suited to withstand chronic irritation.
C. It is an irreversible hypertrophic response characterized by
an increase in individual cell size and cellular protein content.
D. It is an atrophic process resulting from chronic tissue
ischemia that decreases the overall metabolic demand of the
respiratory tract.
, Correct Answer: B. It is a reversible alteration
known as metaplasia, where one mature cell type is
replaced by another mature cell type better suited to
withstand chronic irritation.
Rationale: Squamous metaplasia occurs in the respiratory
tract of chronic smokers as an adaptive response to chronic
irritation from cigarette smoke. The fragile pseudostratified
ciliated columnar epithelium is replaced by a tougher,
stratified squamous epithelium. While this new tissue layer is
more resilient to physical and chemical stress, it loses vital
protective functions, such as mucus secretion and ciliary
clearance. Metaplasia is reversible if the chronic stimulus or
irritant is completely removed.
4. A 34-year-old female presents to her primary care physician
with complaints of generalized fatigue, cold intolerance,
unexplained weight gain, and severe constipation over the past
six months. Physical examination reveals a non-tender,
diffusely enlarged thyroid gland. Laboratory studies
demonstrate a markedly elevated serum thyroid-stimulating
hormone (TSH) level and significantly decreased free thyroxine
(T4) and free triiodothyronine (T3) levels. Serum anti-thyroid
peroxidase (anti-TPO) antibodies are strongly positive. What
type of hypersensitivity reaction is primarily responsible for the
destruction of the thyroid follicular cells in this patient's
condition?
A. Type I hypersensitivity mediated by immunoglobulin E (IgE)
binding to mast cells and triggering immediate degranulation
B. Type II hypersensitivity mediated by autoantibodies
targeting thyroid tissue, leading to complement activation and
antibody-dependent cellular cytotoxicity
C. Type III hypersensitivity characterized by the systemic
deposition of circulating antigen-antibody immune complexes
in small blood vessels
EXAM PREP GRADE A+ RESOURCE WITH
DETAILED CORRECT ANSWERS WITH
RATIONALES | CORRECT VERIFIED
ANSWERS INCLUDED | 100% PASS
GUARANTEE – INSTANT DOWNLOAD
1. A 45-year-old female presents to the clinic complaining of
progressive, symmetrical stiffness and swelling in the small
joints of her hands and wrists over the past nine months. She
notes that the stiffness is most severe in the morning, lasting
for more than an hour after she wakes up. Physical examination
reveals warmth, erythema, and soft-tissue swelling over the
bilateral metacarpophalangeal (MCP) and proximal
interphalangeal (PIP) joints. Laboratory analysis is notable for
elevated rheumatoid factor (RF) and anti-cyclic citrullinated
peptide (anti-CCP) antibodies. Which of the following
pathophysiological structures forms within the joint space and
drives the destruction of cartilage and bone in this disease?
A. A pannus, which is an abnormal layer of fibrovascular
granulation tissue containing inflammatory cells that invades
the joint cartilage
B. Hard, dense osteophytes forming at the joint margins due to
mechanical wear and tear of articular cartilage
C. Tophi, consisting of large, crystalline aggregates of
monosodium urate monohydrate deposited in the periarticular
tissues
D. A thick fibrous capsule lined with benign epithelial cells that
secretes excessively high volumes of serous fluid
Correct Answer: A. A pannus, which is an abnormal
layer of fibrovascular granulation tissue containing
,inflammatory cells that invades the joint cartilage
Rationale: Rheumatoid arthritis is a chronic autoimmune
disease characterized by symmetric inflammatory synovitis.
Activated T cells, B cells, and macrophages infiltrate the
synovium, causing chronic inflammation and hyperplastic
proliferation. This leads to the formation of a pannus—an
abnormal layer of vascularized granulation tissue containing
inflammatory cells. The pannus releases destructive enzymes
like collagenases and metalloproteinases, which erode the
articular cartilage and underlying bone.
2. A 52-year-old male with a history of chronic hypertension
and poorly controlled type 2 diabetes mellitus presents to the
emergency department complaining of sudden onset, severe,
crushing substernal chest pain that radiates to his left shoulder
and jaw. The pain began approximately 45 minutes ago while
he was mowing his lawn and is not relieved by rest or
sublingual nitroglycerin. Laboratory evaluation reveals
significantly elevated cardiac troponin I levels, and an
electrocardiogram shows ST-segment elevation in leads V1
through V4. Which of the following cellular processes
represents the initial, primary consequence of ischemia in this
patient's myocardial tissue?
A. Enhanced aerobic glycolysis leading to severe intracellular
alkalosis and structural protein degradation
B. Failure of the adenosine triphosphate (ATP)-dependent
sodium-potassium pump leading to intracellular sodium
accumulation and cellular swelling
C. Decreased intracellular calcium concentrations due to the
hyperactivity of plasma membrane calcium-ATPase pumps
D. Rapid activation of endogenous antioxidants that
successfully neutralizes harmful reactive oxygen species within
the mitochondria
,Correct Answer: B. Failure of the adenosine
triphosphate (ATP)-dependent sodium-potassium
pump leading to intracellular sodium accumulation
and cellular swelling
Rationale: Ischemia rapidly depletes cellular adenosine
triphosphate (ATP) due to the cessation of aerobic metabolism
and oxidative phosphorylation. Without sufficient ATP, the
plasma membrane's sodium-potassium ATPase pump fails,
allowing sodium to accumulate inside the cell and potassium
to exit. The osmotic gradient created by intracellular sodium
retention pulls water into the cell, resulting in acute cellular
swelling, which is one of the earliest morphological signs of
ischemic injury.
3. A 64-year-old female with a 40 pack-year smoking history
presents to the pulmonology clinic with a chronic, productive
cough and progressive exertional dyspnea over the past three
years. A bronchoscopy is performed, and a tissue biopsy of her
bronchial epithelium is obtained for histological evaluation.
The pathology report indicates that the normal pseudostratified
ciliated columnar epithelial cells have been completely replaced
by stratified squamous epithelial cells. Which of the following
statements best describes this cellular adaptation?
A. It represents a highly malignant and irreversible neoplastic
transformation that will rapidly invade the basement
membrane.
B. It is a reversible alteration known as metaplasia, where one
mature cell type is replaced by another mature cell type better
suited to withstand chronic irritation.
C. It is an irreversible hypertrophic response characterized by
an increase in individual cell size and cellular protein content.
D. It is an atrophic process resulting from chronic tissue
ischemia that decreases the overall metabolic demand of the
respiratory tract.
, Correct Answer: B. It is a reversible alteration
known as metaplasia, where one mature cell type is
replaced by another mature cell type better suited to
withstand chronic irritation.
Rationale: Squamous metaplasia occurs in the respiratory
tract of chronic smokers as an adaptive response to chronic
irritation from cigarette smoke. The fragile pseudostratified
ciliated columnar epithelium is replaced by a tougher,
stratified squamous epithelium. While this new tissue layer is
more resilient to physical and chemical stress, it loses vital
protective functions, such as mucus secretion and ciliary
clearance. Metaplasia is reversible if the chronic stimulus or
irritant is completely removed.
4. A 34-year-old female presents to her primary care physician
with complaints of generalized fatigue, cold intolerance,
unexplained weight gain, and severe constipation over the past
six months. Physical examination reveals a non-tender,
diffusely enlarged thyroid gland. Laboratory studies
demonstrate a markedly elevated serum thyroid-stimulating
hormone (TSH) level and significantly decreased free thyroxine
(T4) and free triiodothyronine (T3) levels. Serum anti-thyroid
peroxidase (anti-TPO) antibodies are strongly positive. What
type of hypersensitivity reaction is primarily responsible for the
destruction of the thyroid follicular cells in this patient's
condition?
A. Type I hypersensitivity mediated by immunoglobulin E (IgE)
binding to mast cells and triggering immediate degranulation
B. Type II hypersensitivity mediated by autoantibodies
targeting thyroid tissue, leading to complement activation and
antibody-dependent cellular cytotoxicity
C. Type III hypersensitivity characterized by the systemic
deposition of circulating antigen-antibody immune complexes
in small blood vessels
