NSG 3113 Pathophysiology ATI/NCLEX Preparation |
Practice Questions & Clinical Rationales 2026/2027
newest updated
Question 1
A nurse is caring for a client who has a serum sodium level of 152
mEq/L. Which of the following pathophysiological responses should the
nurse expect?
A. Intracellular dehydration resulting from osmotic fluid shift out of cells
B. Extracellular fluid volume deficit causing massive peripheral
vasodilation
C. Decreased antidiuretic hormone secretion from the posterior
pituitary gland
D. Shift of sodium ions into the intracellular compartment to balance
osmolality
Correct Answer: A. Intracellular dehydration resulting from osmotic
fluid shift out of cells
Detailed Rationale: Hypernatremia (serum sodium greater than 145
mEq/L) increases the osmotic pressure of the extracellular fluid. This
draws water out of the intracellular space into the ECF via osmosis,
resulting in cellular dehydration, particularly affecting brain cells.
Question 2
,A client with chronic left-sided heart failure reports worsening
shortness of breath and orthopnea. What is the primary underlying
mechanism for these manifestations?
A. Decreased systemic vascular resistance causing peripheral pooling of
blood
B. Increased pulmonary capillary hydrostatic pressure leading to fluid
transudation into the alveoli
C. Primary obstruction of the inferior vena cava by right ventricular
enlargement
D. Elevated systemic oncotic pressure pulling fluid into the interstitial
tissue
Correct Answer: B. Increased pulmonary capillary hydrostatic pressure
leading to fluid transudation into the alveoli
Detailed Rationale: Left-sided heart failure impairs the heart's ability to
pump blood forward into the systemic circulation, causing blood to back
up into the left atrium and pulmonary veins. This raises pulmonary
capillary hydrostatic pressure, forcing fluid across the alveolar-capillary
membrane into the interstitial spaces and alveoli (pulmonary edema).
Question 3
A nurse is reviewing the pathophysiology of an acute asthma attack.
Which of the following cellular events occurs early in the inflammatory
phase?
A. Proliferation of fibrous scar tissue within the alveolar ducts
B. Degranulation of mast cells releasing histamine, leukotrienes, and
cytokines
,C. Permanent destruction of the alveolar wall elastic fibers
D. Autoimmune destruction of bronchial smooth muscle receptors
Correct Answer: B. Degranulation of mast cells releasing histamine,
leukotrienes, and cytokines
Detailed Rationale: During an acute asthma exacerbation, exposure to
a trigger causes IgE-mediated activation and degranulation of mast cells
in the airway mucosa. This releases inflammatory mediators such as
histamine, leukotrienes, and prostaglandins, leading to bronchospasm,
mucosal edema, and mucus hypersecretion.
Question 4
Which of the following clinical findings constitutes part of Cushing's
triad, indicating severe intracranial pressure (ICP) elevation and
impending brain herniation?
A. Tachycardia, hypotension, and rapid shallow respirations
B. Hypertension with a widened pulse pressure, bradycardia, and
irregular respirations
C. Hypotension, tachycardia, and bradypnea
D. Normal blood pressure, reflex tachycardia, and Kussmaul respirations
Correct Answer: B. Hypertension with a widened pulse pressure,
bradycardia, and irregular respirations
Detailed Rationale: Cushing's triad is a classic late sign of significantly
elevated intracranial pressure. It consists of systemic hypertension (with
a widening pulse pressure), bradycardia, and irregular, altered
, respiratory patterns (such as Cheyne-Stokes or ataxic respirations),
reflecting brainstem compression.
Question 5
A client with type 1 diabetes mellitus presents with deep, rapid
respirations (Kussmaul respirations) and a fruity odor to their breath.
What is the underlying pathophysiological cause of these findings?
A. Respiratory alkalosis caused by central nervous system
hyperventilation
B. Accumulation of acidic ketone bodies resulting from uninhibited
lipolysis, leading to metabolic acidosis
C. Lactic acid buildup caused by severe peripheral skeletal muscle
hypoxia
D. Primary renal tubular failure preventing the excretion of volatile acids
Correct Answer: B. Accumulation of acidic ketone bodies resulting from
uninhibited lipolysis, leading to metabolic acidosis
Detailed Rationale: In type 1 diabetes, absolute insulin deficiency
triggers uninhibited lipolysis and hepatic ketogenesis. The buildup of
ketone bodies (acetoacetate and beta-hydroxybutyrate) causes a high
anion-gap metabolic acidosis (DKA). The respiratory system
compensates by blowing off carbon dioxide via rapid, deep Kussmaul
respirations.
Question 6
A client is diagnosed with Gastroesophageal Reflux Disease (GERD) and
is at risk for Barrett's esophagus. Which cellular adaptation process
accounts for this complication?
Practice Questions & Clinical Rationales 2026/2027
newest updated
Question 1
A nurse is caring for a client who has a serum sodium level of 152
mEq/L. Which of the following pathophysiological responses should the
nurse expect?
A. Intracellular dehydration resulting from osmotic fluid shift out of cells
B. Extracellular fluid volume deficit causing massive peripheral
vasodilation
C. Decreased antidiuretic hormone secretion from the posterior
pituitary gland
D. Shift of sodium ions into the intracellular compartment to balance
osmolality
Correct Answer: A. Intracellular dehydration resulting from osmotic
fluid shift out of cells
Detailed Rationale: Hypernatremia (serum sodium greater than 145
mEq/L) increases the osmotic pressure of the extracellular fluid. This
draws water out of the intracellular space into the ECF via osmosis,
resulting in cellular dehydration, particularly affecting brain cells.
Question 2
,A client with chronic left-sided heart failure reports worsening
shortness of breath and orthopnea. What is the primary underlying
mechanism for these manifestations?
A. Decreased systemic vascular resistance causing peripheral pooling of
blood
B. Increased pulmonary capillary hydrostatic pressure leading to fluid
transudation into the alveoli
C. Primary obstruction of the inferior vena cava by right ventricular
enlargement
D. Elevated systemic oncotic pressure pulling fluid into the interstitial
tissue
Correct Answer: B. Increased pulmonary capillary hydrostatic pressure
leading to fluid transudation into the alveoli
Detailed Rationale: Left-sided heart failure impairs the heart's ability to
pump blood forward into the systemic circulation, causing blood to back
up into the left atrium and pulmonary veins. This raises pulmonary
capillary hydrostatic pressure, forcing fluid across the alveolar-capillary
membrane into the interstitial spaces and alveoli (pulmonary edema).
Question 3
A nurse is reviewing the pathophysiology of an acute asthma attack.
Which of the following cellular events occurs early in the inflammatory
phase?
A. Proliferation of fibrous scar tissue within the alveolar ducts
B. Degranulation of mast cells releasing histamine, leukotrienes, and
cytokines
,C. Permanent destruction of the alveolar wall elastic fibers
D. Autoimmune destruction of bronchial smooth muscle receptors
Correct Answer: B. Degranulation of mast cells releasing histamine,
leukotrienes, and cytokines
Detailed Rationale: During an acute asthma exacerbation, exposure to
a trigger causes IgE-mediated activation and degranulation of mast cells
in the airway mucosa. This releases inflammatory mediators such as
histamine, leukotrienes, and prostaglandins, leading to bronchospasm,
mucosal edema, and mucus hypersecretion.
Question 4
Which of the following clinical findings constitutes part of Cushing's
triad, indicating severe intracranial pressure (ICP) elevation and
impending brain herniation?
A. Tachycardia, hypotension, and rapid shallow respirations
B. Hypertension with a widened pulse pressure, bradycardia, and
irregular respirations
C. Hypotension, tachycardia, and bradypnea
D. Normal blood pressure, reflex tachycardia, and Kussmaul respirations
Correct Answer: B. Hypertension with a widened pulse pressure,
bradycardia, and irregular respirations
Detailed Rationale: Cushing's triad is a classic late sign of significantly
elevated intracranial pressure. It consists of systemic hypertension (with
a widening pulse pressure), bradycardia, and irregular, altered
, respiratory patterns (such as Cheyne-Stokes or ataxic respirations),
reflecting brainstem compression.
Question 5
A client with type 1 diabetes mellitus presents with deep, rapid
respirations (Kussmaul respirations) and a fruity odor to their breath.
What is the underlying pathophysiological cause of these findings?
A. Respiratory alkalosis caused by central nervous system
hyperventilation
B. Accumulation of acidic ketone bodies resulting from uninhibited
lipolysis, leading to metabolic acidosis
C. Lactic acid buildup caused by severe peripheral skeletal muscle
hypoxia
D. Primary renal tubular failure preventing the excretion of volatile acids
Correct Answer: B. Accumulation of acidic ketone bodies resulting from
uninhibited lipolysis, leading to metabolic acidosis
Detailed Rationale: In type 1 diabetes, absolute insulin deficiency
triggers uninhibited lipolysis and hepatic ketogenesis. The buildup of
ketone bodies (acetoacetate and beta-hydroxybutyrate) causes a high
anion-gap metabolic acidosis (DKA). The respiratory system
compensates by blowing off carbon dioxide via rapid, deep Kussmaul
respirations.
Question 6
A client is diagnosed with Gastroesophageal Reflux Disease (GERD) and
is at risk for Barrett's esophagus. Which cellular adaptation process
accounts for this complication?
