NUR 641EA Exam 1 V3 | NUR 641EA Advanced
Pathophysiology and Pharmacology for Nurse
Educators | Actual Q&A with Rationale (NUR641EA
Exam 1) | Grand Canyon University
1. A 55-year-old male with a long history of smoking presents with a cough. A biopsy of his
bronchial epithelium reveals that the normal ciliated columnar epithelium has been replaced
by stratified squamous epithelium. Which cellular adaptation is this patient experiencing?
A. Metaplasia
B. Atrophy
C. Hypertrophy
D. Dysplasia
Correct Answer: A
Explanation: Metaplasia is the reversible replacement of one mature cell type by another
mature cell type, often due to chronic irritation. In smokers, the substitution of stratified
squamous cells for ciliated columnar cells provides a more rugged surface but leads to the
loss of protective mechanisms like mucus secretion. While reversible if the stimulus is
removed, prolonged metaplasia can progress to dysplasia and malignancy.
,2. Which of the following processes is characterized by programmed cell death that prevents
an inflammatory response by neatly packaging cellular contents into membrane-bound
vesicles?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Apoptosis
D. Autophagy
Correct Answer: C
Explanation: Apoptosis is a distinct, highly regulated form of cell death that occurs under
both physiological and pathological conditions. Unlike necrosis, which involves cell
swelling and membrane rupture, apoptosis leads to cell shrinkage and the formation of
apoptotic bodies. This process is essential for maintaining homeostasis and eliminating
damaged cells without triggering the systemic inflammatory cascade.
3. A patient is admitted with a blood gas result showing pH 7.25, PaCO2 55 mmHg, and HCO3-
25 mEq/L. The nurse educator explains that this primary acid-base imbalance is caused by
which mechanism?
A. Alveolar hyperventilation
B. Accumulation of nonvolatile acids
C. Excessive intake of bicarbonate
D. Alveolar hypoventilation
,Correct Answer: D
Explanation: The pH of 7.25 indicates acidosis, and the elevated PaCO2 of 55 mmHg
identifies the cause as respiratory. Respiratory acidosis is primarily driven by alveolar
hypoventilation, which leads to the retention of carbon dioxide. This condition is frequently
seen in patients with chronic obstructive pulmonary disease (COPD) or respiratory
depression from medications.
4. A drug with a high affinity for a receptor that prevents the natural ligand from binding and
produces no physiological response is known as a(n):
A. Full agonist
B. Antagonist
C. Partial agonist
D. Inverse agonist
Correct Answer: B
Explanation: An antagonist is a drug that binds to a receptor but does not activate it,
effectively blocking the action of endogenous ligands. While it possesses affinity, it lacks
intrinsic activity, meaning it cannot induce a cellular response on its own. Clinical examples
include beta-blockers, which compete with epinephrine at cardiac receptors to lower heart
rate.
, 5. Which electrolyte imbalance is most commonly associated with the development of
prominent U waves on an electrocardiogram (EKG)?
A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hypomagnesemia
Correct Answer: B
Explanation: Hypokalemia, defined as a serum potassium level below 3.5 mEq/L, alters
the repolarization phase of the cardiac action potential. This often manifests as flattened T
waves and the emergence of a visible U wave. Severe hypokalemia can lead to life-
threatening arrhythmias and cardiac arrest if left untreated.
6. Select All That Apply: Which of the following are considered cardinal signs of local
inflammation? (SATA)
A. Rubor (Redness)
B. Calor (Heat)
C. Tumor (Swelling)
D. Dolor (Pain)
E. Functio laesa (Loss of function)
F. Leukopenia
Pathophysiology and Pharmacology for Nurse
Educators | Actual Q&A with Rationale (NUR641EA
Exam 1) | Grand Canyon University
1. A 55-year-old male with a long history of smoking presents with a cough. A biopsy of his
bronchial epithelium reveals that the normal ciliated columnar epithelium has been replaced
by stratified squamous epithelium. Which cellular adaptation is this patient experiencing?
A. Metaplasia
B. Atrophy
C. Hypertrophy
D. Dysplasia
Correct Answer: A
Explanation: Metaplasia is the reversible replacement of one mature cell type by another
mature cell type, often due to chronic irritation. In smokers, the substitution of stratified
squamous cells for ciliated columnar cells provides a more rugged surface but leads to the
loss of protective mechanisms like mucus secretion. While reversible if the stimulus is
removed, prolonged metaplasia can progress to dysplasia and malignancy.
,2. Which of the following processes is characterized by programmed cell death that prevents
an inflammatory response by neatly packaging cellular contents into membrane-bound
vesicles?
A. Coagulative necrosis
B. Liquefactive necrosis
C. Apoptosis
D. Autophagy
Correct Answer: C
Explanation: Apoptosis is a distinct, highly regulated form of cell death that occurs under
both physiological and pathological conditions. Unlike necrosis, which involves cell
swelling and membrane rupture, apoptosis leads to cell shrinkage and the formation of
apoptotic bodies. This process is essential for maintaining homeostasis and eliminating
damaged cells without triggering the systemic inflammatory cascade.
3. A patient is admitted with a blood gas result showing pH 7.25, PaCO2 55 mmHg, and HCO3-
25 mEq/L. The nurse educator explains that this primary acid-base imbalance is caused by
which mechanism?
A. Alveolar hyperventilation
B. Accumulation of nonvolatile acids
C. Excessive intake of bicarbonate
D. Alveolar hypoventilation
,Correct Answer: D
Explanation: The pH of 7.25 indicates acidosis, and the elevated PaCO2 of 55 mmHg
identifies the cause as respiratory. Respiratory acidosis is primarily driven by alveolar
hypoventilation, which leads to the retention of carbon dioxide. This condition is frequently
seen in patients with chronic obstructive pulmonary disease (COPD) or respiratory
depression from medications.
4. A drug with a high affinity for a receptor that prevents the natural ligand from binding and
produces no physiological response is known as a(n):
A. Full agonist
B. Antagonist
C. Partial agonist
D. Inverse agonist
Correct Answer: B
Explanation: An antagonist is a drug that binds to a receptor but does not activate it,
effectively blocking the action of endogenous ligands. While it possesses affinity, it lacks
intrinsic activity, meaning it cannot induce a cellular response on its own. Clinical examples
include beta-blockers, which compete with epinephrine at cardiac receptors to lower heart
rate.
, 5. Which electrolyte imbalance is most commonly associated with the development of
prominent U waves on an electrocardiogram (EKG)?
A. Hyperkalemia
B. Hypokalemia
C. Hypercalcemia
D. Hypomagnesemia
Correct Answer: B
Explanation: Hypokalemia, defined as a serum potassium level below 3.5 mEq/L, alters
the repolarization phase of the cardiac action potential. This often manifests as flattened T
waves and the emergence of a visible U wave. Severe hypokalemia can lead to life-
threatening arrhythmias and cardiac arrest if left untreated.
6. Select All That Apply: Which of the following are considered cardinal signs of local
inflammation? (SATA)
A. Rubor (Redness)
B. Calor (Heat)
C. Tumor (Swelling)
D. Dolor (Pain)
E. Functio laesa (Loss of function)
F. Leukopenia
