___________________________________________________________________
Anesthesiologist Assistant Certifying
Exam Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
Pdf
___________________________________________________________________
1. Which portion of the autonomic nervous system is primarily responsible for
increasing heart rate and myocardial contractility during acute stress?
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
D. Enteric nervous system
Answer: Sympathetic nervous system
Rationale: The sympathetic nervous system increases heart rate, contractility,
and vascular tone through catecholamine-mediated effects that support the
cardiovascular response to stress.
2. Which cranial nerve provides the major parasympathetic innervation to the
heart?
A. Cranial nerve III
B. Cranial nerve V
,C. Cranial nerve VII
D. Cranial nerve X
Answer: Cranial nerve X
Rationale: The vagus nerve, cranial nerve X, provides substantial
parasympathetic cardiac innervation and slows sinoatrial and atrioventricular
nodal activity.
3. Which factor most directly determines alveolar oxygen tension?
A. Hemoglobin concentration
B. Inspired oxygen concentration and alveolar ventilation
C. Cardiac output alone
D. Serum bicarbonate concentration
Answer: Inspired oxygen concentration and alveolar ventilation
Rationale: Alveolar oxygen tension is primarily influenced by inspired oxygen
tension, alveolar ventilation, and the balance between oxygen uptake and
carbon dioxide elimination.
4. Which pulmonary volume cannot be measured directly by simple
spirometry?
A. Tidal volume
B. Inspiratory reserve volume
C. Expiratory reserve volume
D. Residual volume
Answer: Residual volume
Rationale: Residual volume remains in the lungs after maximal expiration and
requires techniques such as helium dilution, nitrogen washout, or body
plethysmography for measurement.
5. What is the primary determinant of cerebral blood flow under normal
physiologic conditions?
,A. Cerebral perfusion pressure and vascular resistance
B. Hemoglobin concentration alone
C. Serum sodium concentration
D. Central venous pressure alone
Answer: Cerebral perfusion pressure and vascular resistance
Rationale: Cerebral blood flow depends largely on cerebral perfusion pressure
and cerebrovascular resistance, with autoregulation maintaining relatively
stable flow across an appropriate blood-pressure range.
6. Which anesthetic agent is most associated with dose-dependent myocardial
depression and hypotension?
A. Propofol
B. Ketamine
C. Nitrous oxide
D. Midazolam
Answer: Propofol
Rationale: Propofol commonly produces systemic vasodilation and myocardial
depression, making hypotension particularly likely after induction doses.
7. Which intravenous anesthetic is characterized by sympathetic stimulation
and relative preservation of airway reflexes?
A. Propofol
B. Etomidate
C. Ketamine
D. Thiopental
Answer: Ketamine
Rationale: Ketamine produces dissociative anesthesia and commonly increases
sympathetic activity, heart rate, and blood pressure while generally preserving
spontaneous ventilation and airway reflexes better than many other induction
agents.
, 8. Which induction agent is often selected when cardiovascular stability is a
major concern?
A. Etomidate
B. Propofol
C. Thiopental
D. High-dose midazolam
Answer: Etomidate
Rationale: Etomidate generally causes less cardiovascular depression than
propofol and is frequently considered when significant hemodynamic instability
is present.
9. Which opioid is most strongly associated with chest-wall rigidity when
administered rapidly in high doses?
A. Morphine
B. Fentanyl
C. Meperidine
D. Tramadol
Answer: Fentanyl
Rationale: Rapid administration of high-dose fentanyl and related potent
opioids can produce skeletal muscle rigidity, including thoracic rigidity that may
complicate ventilation.
10.Which opioid antagonist is used to reverse opioid-induced respiratory
depression?
A. Flumazenil
B. Naloxone
C. Sugammadex
D. Atropine
Answer: Naloxone
Anesthesiologist Assistant Certifying
Exam Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
___________________________________________________________________
1. Which portion of the autonomic nervous system is primarily responsible for
increasing heart rate and myocardial contractility during acute stress?
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
D. Enteric nervous system
Answer: Sympathetic nervous system
Rationale: The sympathetic nervous system increases heart rate, contractility,
and vascular tone through catecholamine-mediated effects that support the
cardiovascular response to stress.
2. Which cranial nerve provides the major parasympathetic innervation to the
heart?
A. Cranial nerve III
B. Cranial nerve V
,C. Cranial nerve VII
D. Cranial nerve X
Answer: Cranial nerve X
Rationale: The vagus nerve, cranial nerve X, provides substantial
parasympathetic cardiac innervation and slows sinoatrial and atrioventricular
nodal activity.
3. Which factor most directly determines alveolar oxygen tension?
A. Hemoglobin concentration
B. Inspired oxygen concentration and alveolar ventilation
C. Cardiac output alone
D. Serum bicarbonate concentration
Answer: Inspired oxygen concentration and alveolar ventilation
Rationale: Alveolar oxygen tension is primarily influenced by inspired oxygen
tension, alveolar ventilation, and the balance between oxygen uptake and
carbon dioxide elimination.
4. Which pulmonary volume cannot be measured directly by simple
spirometry?
A. Tidal volume
B. Inspiratory reserve volume
C. Expiratory reserve volume
D. Residual volume
Answer: Residual volume
Rationale: Residual volume remains in the lungs after maximal expiration and
requires techniques such as helium dilution, nitrogen washout, or body
plethysmography for measurement.
5. What is the primary determinant of cerebral blood flow under normal
physiologic conditions?
,A. Cerebral perfusion pressure and vascular resistance
B. Hemoglobin concentration alone
C. Serum sodium concentration
D. Central venous pressure alone
Answer: Cerebral perfusion pressure and vascular resistance
Rationale: Cerebral blood flow depends largely on cerebral perfusion pressure
and cerebrovascular resistance, with autoregulation maintaining relatively
stable flow across an appropriate blood-pressure range.
6. Which anesthetic agent is most associated with dose-dependent myocardial
depression and hypotension?
A. Propofol
B. Ketamine
C. Nitrous oxide
D. Midazolam
Answer: Propofol
Rationale: Propofol commonly produces systemic vasodilation and myocardial
depression, making hypotension particularly likely after induction doses.
7. Which intravenous anesthetic is characterized by sympathetic stimulation
and relative preservation of airway reflexes?
A. Propofol
B. Etomidate
C. Ketamine
D. Thiopental
Answer: Ketamine
Rationale: Ketamine produces dissociative anesthesia and commonly increases
sympathetic activity, heart rate, and blood pressure while generally preserving
spontaneous ventilation and airway reflexes better than many other induction
agents.
, 8. Which induction agent is often selected when cardiovascular stability is a
major concern?
A. Etomidate
B. Propofol
C. Thiopental
D. High-dose midazolam
Answer: Etomidate
Rationale: Etomidate generally causes less cardiovascular depression than
propofol and is frequently considered when significant hemodynamic instability
is present.
9. Which opioid is most strongly associated with chest-wall rigidity when
administered rapidly in high doses?
A. Morphine
B. Fentanyl
C. Meperidine
D. Tramadol
Answer: Fentanyl
Rationale: Rapid administration of high-dose fentanyl and related potent
opioids can produce skeletal muscle rigidity, including thoracic rigidity that may
complicate ventilation.
10.Which opioid antagonist is used to reverse opioid-induced respiratory
depression?
A. Flumazenil
B. Naloxone
C. Sugammadex
D. Atropine
Answer: Naloxone
