___________________________________________________________________
Certified Anesthesiologist Assistant
(CAA) CDQ Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
Pdf
___________________________________________________________________
1. Which primary physiologic variable is most directly responsible for alveolar
ventilation?
A. Pulmonary blood flow
B. Tidal volume and respiratory rate
C. Hemoglobin concentration
D. Cardiac output
Answer: Tidal volume and respiratory rate
Rationale: Alveolar ventilation depends on the amount of fresh gas reaching the
alveoli per minute, determined primarily by respiratory rate and tidal volume
after accounting for dead space.
2. Which receptor is primarily responsible for increasing heart rate in response
to sympathetic stimulation?
A. Alpha-1 receptor
B. Alpha-2 receptor
,C. Beta-1 receptor
D. Beta-2 receptor
Answer: Beta-1 receptor
Rationale: Beta-1 adrenergic receptors in the heart increase heart rate,
contractility, and conduction when stimulated by sympathetic activity.
3. What is the most important determinant of arterial oxygen content?
A. Plasma bicarbonate
B. Hemoglobin concentration and oxygen saturation
C. Respiratory rate alone
D. Serum sodium concentration
Answer: Hemoglobin concentration and oxygen saturation
Rationale: Most oxygen in arterial blood is bound to hemoglobin, making
hemoglobin concentration and saturation major determinants of oxygen
content.
4. Which induction agent is generally associated with cardiovascular stability
and preservation of sympathetic tone?
A. Propofol
B. Etomidate
C. Thiopental
D. Midazolam
Answer: Etomidate
Rationale: Etomidate generally produces less cardiovascular depression than
many other induction agents and is often selected when hemodynamic stability
is important.
5. Which inhaled anesthetic is commonly associated with the greatest
reduction in systemic vascular resistance?
A. Sevoflurane
B. Isoflurane
,C. Desflurane
D. Nitrous oxide
Answer: Isoflurane
Rationale: Isoflurane produces substantial vasodilation and can significantly
reduce systemic vascular resistance, particularly at higher concentrations.
6. Which neuromuscular blocker is classified as a depolarizing agent?
A. Rocuronium
B. Vecuronium
C. Cisatracurium
D. Succinylcholine
Answer: Succinylcholine
Rationale: Succinylcholine is a depolarizing neuromuscular blocker that produces
persistent activation of the nicotinic acetylcholine receptor at the neuromuscular
junction.
7. Which medication is commonly used to reverse opioid-induced respiratory
depression?
A. Flumazenil
B. Naloxone
C. Sugammadex
D. Atropine
Answer: Naloxone
Rationale: Naloxone is an opioid receptor antagonist used to reverse clinically
significant opioid-induced respiratory and central nervous system depression.
8. Which medication specifically reverses the effects of benzodiazepines?
A. Naloxone
B. Dantrolene
C. Flumazenil
D. Neostigmine
, Answer: Flumazenil
Rationale: Flumazenil is a benzodiazepine receptor antagonist that can reverse
benzodiazepine sedation.
9. What is the principal mechanism of action of propofol?
A. NMDA receptor agonism
B. GABA-mediated central nervous system depression
C. Dopamine receptor blockade
D. Muscarinic receptor stimulation
Answer: GABA-mediated central nervous system depression
Rationale: Propofol enhances inhibitory GABAergic neurotransmission,
producing hypnosis and central nervous system depression.
10.Which electrolyte abnormality is particularly associated with cardiac
dysrhythmias and muscle weakness?
A. Hyperkalemia
B. Hyperchloremia
C. Mild hypernatremia
D. Hypophosphatemia only
Answer: Hyperkalemia
Rationale: Elevated serum potassium alters cardiac membrane excitability and
can cause potentially life-threatening conduction abnormalities and
dysrhythmias.
11.What is the primary purpose of preoxygenation before induction of general
anesthesia?
A. Increase carbon dioxide production
B. Replace alveolar nitrogen with oxygen
C. Decrease functional residual capacity
D. Increase anesthetic uptake
Answer: Replace alveolar nitrogen with oxygen
Certified Anesthesiologist Assistant
(CAA) CDQ Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
___________________________________________________________________
1. Which primary physiologic variable is most directly responsible for alveolar
ventilation?
A. Pulmonary blood flow
B. Tidal volume and respiratory rate
C. Hemoglobin concentration
D. Cardiac output
Answer: Tidal volume and respiratory rate
Rationale: Alveolar ventilation depends on the amount of fresh gas reaching the
alveoli per minute, determined primarily by respiratory rate and tidal volume
after accounting for dead space.
2. Which receptor is primarily responsible for increasing heart rate in response
to sympathetic stimulation?
A. Alpha-1 receptor
B. Alpha-2 receptor
,C. Beta-1 receptor
D. Beta-2 receptor
Answer: Beta-1 receptor
Rationale: Beta-1 adrenergic receptors in the heart increase heart rate,
contractility, and conduction when stimulated by sympathetic activity.
3. What is the most important determinant of arterial oxygen content?
A. Plasma bicarbonate
B. Hemoglobin concentration and oxygen saturation
C. Respiratory rate alone
D. Serum sodium concentration
Answer: Hemoglobin concentration and oxygen saturation
Rationale: Most oxygen in arterial blood is bound to hemoglobin, making
hemoglobin concentration and saturation major determinants of oxygen
content.
4. Which induction agent is generally associated with cardiovascular stability
and preservation of sympathetic tone?
A. Propofol
B. Etomidate
C. Thiopental
D. Midazolam
Answer: Etomidate
Rationale: Etomidate generally produces less cardiovascular depression than
many other induction agents and is often selected when hemodynamic stability
is important.
5. Which inhaled anesthetic is commonly associated with the greatest
reduction in systemic vascular resistance?
A. Sevoflurane
B. Isoflurane
,C. Desflurane
D. Nitrous oxide
Answer: Isoflurane
Rationale: Isoflurane produces substantial vasodilation and can significantly
reduce systemic vascular resistance, particularly at higher concentrations.
6. Which neuromuscular blocker is classified as a depolarizing agent?
A. Rocuronium
B. Vecuronium
C. Cisatracurium
D. Succinylcholine
Answer: Succinylcholine
Rationale: Succinylcholine is a depolarizing neuromuscular blocker that produces
persistent activation of the nicotinic acetylcholine receptor at the neuromuscular
junction.
7. Which medication is commonly used to reverse opioid-induced respiratory
depression?
A. Flumazenil
B. Naloxone
C. Sugammadex
D. Atropine
Answer: Naloxone
Rationale: Naloxone is an opioid receptor antagonist used to reverse clinically
significant opioid-induced respiratory and central nervous system depression.
8. Which medication specifically reverses the effects of benzodiazepines?
A. Naloxone
B. Dantrolene
C. Flumazenil
D. Neostigmine
, Answer: Flumazenil
Rationale: Flumazenil is a benzodiazepine receptor antagonist that can reverse
benzodiazepine sedation.
9. What is the principal mechanism of action of propofol?
A. NMDA receptor agonism
B. GABA-mediated central nervous system depression
C. Dopamine receptor blockade
D. Muscarinic receptor stimulation
Answer: GABA-mediated central nervous system depression
Rationale: Propofol enhances inhibitory GABAergic neurotransmission,
producing hypnosis and central nervous system depression.
10.Which electrolyte abnormality is particularly associated with cardiac
dysrhythmias and muscle weakness?
A. Hyperkalemia
B. Hyperchloremia
C. Mild hypernatremia
D. Hypophosphatemia only
Answer: Hyperkalemia
Rationale: Elevated serum potassium alters cardiac membrane excitability and
can cause potentially life-threatening conduction abnormalities and
dysrhythmias.
11.What is the primary purpose of preoxygenation before induction of general
anesthesia?
A. Increase carbon dioxide production
B. Replace alveolar nitrogen with oxygen
C. Decrease functional residual capacity
D. Increase anesthetic uptake
Answer: Replace alveolar nitrogen with oxygen
