CSUSM NURS 316A EXAM 1 PATHOPHYSIOLOGY &
PHARMACOLOGY FOR ACCELERATED BSN STUDY GUIDE
ALL VERIFIED QUESTIONS, ANSWERS & RATIONALES
This premium study guide delivers highly specialized multiple-
choice practice questions with detailed diagnostic rationales for
the NURS 316A curriculum. It seamlessly integrates
foundational pathophysiology concepts like cellular adaptation
and acid-base mechanics with essential pharmacokinetic
principles to ensure complete mastery of Exam 1 material.
Optimized specifically for fast-paced accelerated nursing
students, this resource acts as a high-yield tool to secure top-
tier marks on challenging assessments.
1. A patient presents with a plasma pH of 7.21 and a PaCO2
of 58 mmHg. Which intervention is most appropriate to
correct this underlying imbalance?
A. Intravenous administration of sodium bicarbonate
B. Administration of albuterol via nebulizer
C. Insertion of a nasogastric tube to low intermittent suction
D. Initiation of an insulin infusion pump
Answer: B
Rationale: A pH of 7.21 with an elevated PaCO2 indicates
respiratory acidosis. Respiratory acidosis is caused by
hypoventilation and carbon dioxide retention.
Administering a bronchodilator like albuterol helps open
,the airways, improve alveolar ventilation, and clear
trapped carbon dioxide, addressing the root cause.
2. The nurse evaluates an elevated anion gap on a
comprehensive metabolic panel. This diagnostic value is
primarily utilized to differentiate the underlying causes of
which acid-base disturbance?
A. Respiratory Acidosis
B. Respiratory Alkalosis
C. Metabolic Acidosis
D. Metabolic Alkalosis
Answer: C
Rationale: The anion gap measures the difference
between measured cations and unmeasured anions in
the serum. It is specifically calculated during states of
metabolic acidosis to determine whether the acidosis is
caused by an accumulation of metabolic acids (high
anion gap, e.g., diabetic ketoacidosis, lactic acidosis) or
a loss of bicarbonate (normal anion gap).
3. A patient is admitted following a traumatic brain injury
(TBI). Which objective laboratory parameter is
considered the definitive diagnostic test to continuously
monitor the patient’s precise systemic oxygenation and
ventilation status?
,A. Pulse oximetry percentage (SpO2)
B. Arterial Blood Gas (ABG) analysis
C. Central venous pressure tracking
D. End-tidal carbon dioxide (EtCO2) monitoring
Answer: B
Rationale: While pulse oximetry provides quick non-
invasive monitoring, an Arterial Blood Gas (ABG) panel is
the definitive diagnostic standard. It directly measures
partial pressures of oxygen (PaO2) and carbon dioxide
(PaCO2), as well as arterial pH, which are critical
parameters needed to manage and protect neurological
function in TBI patients.
4. During a pathophysiology lecture, a nursing student
asks about cellular adaptation. Which process describes
a reversible change where one adult differentiated cell
type is replaced by another adult cell type, often due to
chronic irritation?
A. Hyperplasia
B. Atrophy
C. Dysplasia
D. Metaplasia
Answer: D
Rationale: Metaplasia is a reversible adaptive process
where one mature, differentiated cell type is substituted
by another cell type that is better able to withstand a
, hostile, chronically irritating environment (e.g., ciliated
columnar epithelial cells changing to stratified squamous
cells in the airways of chronic smokers).
5. Which core phase of pharmacokinetics describes the
systemic biotransformation or chemical alteration of a
drug molecule, occurring primarily via hepatic enzyme
pathways?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Answer: C
Rationale: Metabolism (or biotransformation) is the
enzymatic modification of a drug's chemical structure.
This process takes place primarily in the liver via the
cytochrome P450 enzyme system, preparing the drug
molecule for ultimate elimination from the body.
6. A patient presents to the emergency department with
profound diabetic ketoacidosis (DKA). The nurse
anticipates an order for an intravenous insulin infusion.
What is the primary therapeutic mechanism of insulin in
treating this type of metabolic acidosis?
A. It acts as a direct chemical buffer to neutralize circulating
hydrogen ions.
PHARMACOLOGY FOR ACCELERATED BSN STUDY GUIDE
ALL VERIFIED QUESTIONS, ANSWERS & RATIONALES
This premium study guide delivers highly specialized multiple-
choice practice questions with detailed diagnostic rationales for
the NURS 316A curriculum. It seamlessly integrates
foundational pathophysiology concepts like cellular adaptation
and acid-base mechanics with essential pharmacokinetic
principles to ensure complete mastery of Exam 1 material.
Optimized specifically for fast-paced accelerated nursing
students, this resource acts as a high-yield tool to secure top-
tier marks on challenging assessments.
1. A patient presents with a plasma pH of 7.21 and a PaCO2
of 58 mmHg. Which intervention is most appropriate to
correct this underlying imbalance?
A. Intravenous administration of sodium bicarbonate
B. Administration of albuterol via nebulizer
C. Insertion of a nasogastric tube to low intermittent suction
D. Initiation of an insulin infusion pump
Answer: B
Rationale: A pH of 7.21 with an elevated PaCO2 indicates
respiratory acidosis. Respiratory acidosis is caused by
hypoventilation and carbon dioxide retention.
Administering a bronchodilator like albuterol helps open
,the airways, improve alveolar ventilation, and clear
trapped carbon dioxide, addressing the root cause.
2. The nurse evaluates an elevated anion gap on a
comprehensive metabolic panel. This diagnostic value is
primarily utilized to differentiate the underlying causes of
which acid-base disturbance?
A. Respiratory Acidosis
B. Respiratory Alkalosis
C. Metabolic Acidosis
D. Metabolic Alkalosis
Answer: C
Rationale: The anion gap measures the difference
between measured cations and unmeasured anions in
the serum. It is specifically calculated during states of
metabolic acidosis to determine whether the acidosis is
caused by an accumulation of metabolic acids (high
anion gap, e.g., diabetic ketoacidosis, lactic acidosis) or
a loss of bicarbonate (normal anion gap).
3. A patient is admitted following a traumatic brain injury
(TBI). Which objective laboratory parameter is
considered the definitive diagnostic test to continuously
monitor the patient’s precise systemic oxygenation and
ventilation status?
,A. Pulse oximetry percentage (SpO2)
B. Arterial Blood Gas (ABG) analysis
C. Central venous pressure tracking
D. End-tidal carbon dioxide (EtCO2) monitoring
Answer: B
Rationale: While pulse oximetry provides quick non-
invasive monitoring, an Arterial Blood Gas (ABG) panel is
the definitive diagnostic standard. It directly measures
partial pressures of oxygen (PaO2) and carbon dioxide
(PaCO2), as well as arterial pH, which are critical
parameters needed to manage and protect neurological
function in TBI patients.
4. During a pathophysiology lecture, a nursing student
asks about cellular adaptation. Which process describes
a reversible change where one adult differentiated cell
type is replaced by another adult cell type, often due to
chronic irritation?
A. Hyperplasia
B. Atrophy
C. Dysplasia
D. Metaplasia
Answer: D
Rationale: Metaplasia is a reversible adaptive process
where one mature, differentiated cell type is substituted
by another cell type that is better able to withstand a
, hostile, chronically irritating environment (e.g., ciliated
columnar epithelial cells changing to stratified squamous
cells in the airways of chronic smokers).
5. Which core phase of pharmacokinetics describes the
systemic biotransformation or chemical alteration of a
drug molecule, occurring primarily via hepatic enzyme
pathways?
A. Absorption
B. Distribution
C. Metabolism
D. Excretion
Answer: C
Rationale: Metabolism (or biotransformation) is the
enzymatic modification of a drug's chemical structure.
This process takes place primarily in the liver via the
cytochrome P450 enzyme system, preparing the drug
molecule for ultimate elimination from the body.
6. A patient presents to the emergency department with
profound diabetic ketoacidosis (DKA). The nurse
anticipates an order for an intravenous insulin infusion.
What is the primary therapeutic mechanism of insulin in
treating this type of metabolic acidosis?
A. It acts as a direct chemical buffer to neutralize circulating
hydrogen ions.
