Question 1

Diffusion hypoxia may occur if insufficient 100% oxygen is delivered at the termination of a nitrous oxide procedure because:

Accepted Answer

A)  the lungs are insufficiently inflated. 
B)  the loss of carbon dioxide could decrease ventilation. 
C)  nitrous oxide is highly soluble in blood. 
D)  nitrous oxide has a slow onset and recovery. 
A)  the lungs are insufficiently inflated. 
B)  the loss of carbon dioxide could decrease ventilation. 
C)  nitrous oxide is highly soluble in blood. 
D)  nitrous oxide has a slow onset and recovery. B

Question 2

The following are characteristics of propofol except which one?

Accepted Answer

A)  Rapid onset of action 
B)  Produces little vomiting 
C)  Undergoes phase II metabolism in the liver 
D)  Intravenous anesthetic 
E)  Structurally related to barbiturates 
A)  Rapid onset of action 
B)  Produces little vomiting 
C)  Undergoes phase II metabolism in the liver 
D)  Intravenous anesthetic 
E)  Structurally related to barbiturates E

Question 3

Which of the following dental specialists is most likely to use general anesthetic drugs in their offices?

Accepted Answer

A)  Prosthodontist 
B)  Endodontist 
C)  Oral and maxillofacial surgeon 
D)  Orthodontist 
E)  Pediatric dentist 
A)  Prosthodontist 
B)  Endodontist 
C)  Oral and maxillofacial surgeon 
D)  Orthodontist 
E)  Pediatric dentist C

Question 4

The less soluble the anesthetic is in body tissues, the more rapid the _____. (Select all that apply.)

Accepted Answer

A)  onset 
B)  breathing rate 
C)  heart rate 
D)  recovery 
A)  onset 
B)  breathing rate 
C)  heart rate 
D)  recovery

Question 5

Which of the following general anesthetic agents was introduced in the middle 1800s and led to a dramatic reduction in surgically related mortality?

Accepted Answer

A)  Propofol 
B)  Isoflurane 
C)  Ether 
D)  Nitrous oxide 
A)  Propofol 
B)  Isoflurane 
C)  Ether 
D)  Nitrous oxide

Question 6

Which of the following are benzodiazepines that are used for conscious sedation and preanesthetic medication prior to general anesthesia? (Select all that apply.)

Accepted Answer

A)  Diazepam (Valium) 
B)  Fentanyl (Sublimaze) 
C)  Midazolam (Versed) 
D)  Methohexital sodium (Brevital) 
A)  Diazepam (Valium) 
B)  Fentanyl (Sublimaze) 
C)  Midazolam (Versed) 
D)  Methohexital sodium (Brevital)

Question 7

Which inhalational agent has a pungent smell and can cause respiratory acidosis with deeper levels of anesthesia?

Accepted Answer

A)  Isoflurane 
B)  Halothane 
C)  Enflurane 
D)  Sevoflurane 
E)  Nitrous oxide 
A)  Isoflurane 
B)  Halothane 
C)  Enflurane 
D)  Sevoflurane 
E)  Nitrous oxide

Question 8

Nitrous oxide is a complete anesthetic.

Accepted Answer

A) True 
 B)False

Question 9

Nitrous oxide has been shown to reduce the activity of methionine synthetase, the enzyme involved with the function of which vitamin?

Accepted Answer

A)  Vitamin B₁ 
B)  Vitamin K 
C)  Vitamin B₆ 
D)  Folic acid 
E)  Vitamin B₁₂ 
A)  Vitamin B₁ 
B)  Vitamin K 
C)  Vitamin B₆ 
D)  Folic acid 
E)  Vitamin B₁₂

Question 10

Nitrous oxide cylinders are _____ and oxygen cylinders are _____: (1)red, (2)green, (3)blue, (4)orange, and (5)tan.

Accepted Answer

A)  1, 2 
B)  3, 2 
C)  2, 4 
D)  3, 4 
E)  3, 5 
A)  1, 2 
B)  3, 2 
C)  2, 4 
D)  3, 4 
E)  3, 5

Question 11

A patient for whom nitrous oxide is to be administered should be warned to avoid eating a large meal within _____ hours of the appointment.

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 12

Which of the following statements are true about volatile general anesthetics? (Select all that apply.)

Accepted Answer

A)  They are liquids that evaporate easily at room temperature. 
B)  They are classified as halogenated hydrocarbons and ethers. 
C)  They are known to have good solubility in body tissues. 
D)  They are administered intravenously (IV). 
A)  They are liquids that evaporate easily at room temperature. 
B)  They are classified as halogenated hydrocarbons and ethers. 
C)  They are known to have good solubility in body tissues. 
D)  They are administered intravenously (IV).

Question 13

The average percentage of nitrous oxide required for patient comfort is:

Accepted Answer

A)  10%. 
B)  25%. 
C)  35%. 
D)  50%. 
A)  10%. 
B)  25%. 
C)  35%. 
D)  50%.

Question 14

The loss of respiratory control (i.e., diminished carbon dioxide response, paralysis of intercostal muscles)first occurs during which of Guedel's stages of anesthesia?

Accepted Answer

A)  Stage I 
B)  Stage II 
C)  Stage III 
D)  Stage IV 
A)  Stage I 
B)  Stage II 
C)  Stage III 
D)  Stage IV

Question 15

Which of the following effects is not a characteristic of the action of ketamine?

Accepted Answer

A)  Produces "dissociative" anesthesia 
B)  Causes xerostomia 
C)  Increases cardiac output 
D)  Causes recovery associated with delirium and hallucinations 
A)  Produces "dissociative" anesthesia 
B)  Causes xerostomia 
C)  Increases cardiac output 
D)  Causes recovery associated with delirium and hallucinations

Question 16

Which of the following are types of intravenous general anesthetics? (Select all that apply.)

Accepted Answer

A)  Opioids 
B)  Enflurane 
C)  Etomidate 
D)  Isoflurane 
E)  Propofol 
A)  Opioids 
B)  Enflurane 
C)  Etomidate 
D)  Isoflurane 
E)  Propofol

Question 17

Recovery from a single intravenous dose of thiopental (sodium pentothal)is the result of:

Accepted Answer

A)  drug excretion. 
B)  drug redistribution. 
C)  drug metabolism. 
D)  enzyme induction. 
A)  drug excretion. 
B)  drug redistribution. 
C)  drug metabolism. 
D)  enzyme induction.

Question 18

The more soluble the anesthetic is in body tissues, the more rapid the onset and recovery will be.

Accepted Answer

A) True 
 B)False

Question 19

Approximately 15% of halothane is metabolized in the liver, and these metabolites have been suggested as a cause of renal damage.

Accepted Answer

A)  Both parts of the statement are true. 
B)  Both parts of the statement are false. 
C)  The first part of the statement is true; the second part is false. 
D)  The first part of the statement is false; the second part is true. 
A)  Both parts of the statement are true. 
B)  Both parts of the statement are false. 
C)  The first part of the statement is true; the second part is false. 
D)  The first part of the statement is false; the second part is true.

Question 20

Nitrous oxide combined with oxygen (N₂O/O₂)has become a primary part of dental office _____ procedures.

Accepted Answer

A)  anxiety reduction 
B)  general anesthesia 
C)  sleep apnea 
D)  bruxism 
A)  anxiety reduction 
B)  general anesthesia 
C)  sleep apnea 
D)  bruxism

Exam 10: General Anesthetics

Diffusion hypoxia may occur if insufficient 100% oxygen is delivered at the termination of a nitrous oxide procedure because:

The following are characteristics of propofol except which one?

Which of the following dental specialists is most likely to use general anesthetic drugs in their offices?

The less soluble the anesthetic is in body tissues, the more rapid the _____. (Select all that apply.)

Which of the following general anesthetic agents was introduced in the middle 1800s and led to a dramatic reduction in surgically related mortality?

Which of the following are benzodiazepines that are used for conscious sedation and preanesthetic medication prior to general anesthesia? (Select all that apply.)

Which inhalational agent has a pungent smell and can cause respiratory acidosis with deeper levels of anesthesia?

Nitrous oxide is a complete anesthetic.

Nitrous oxide has been shown to reduce the activity of methionine synthetase, the enzyme involved with the function of which vitamin?

Nitrous oxide cylinders are _____ and oxygen cylinders are _____: (1)red, (2)green, (3)blue, (4)orange, and (5)tan.

A patient for whom nitrous oxide is to be administered should be warned to avoid eating a large meal within _____ hours of the appointment.

Which of the following statements are true about volatile general anesthetics? (Select all that apply.)

The average percentage of nitrous oxide required for patient comfort is:

The loss of respiratory control (i.e., diminished carbon dioxide response, paralysis of intercostal muscles)first occurs during which of Guedel's stages of anesthesia?

Which of the following effects is not a characteristic of the action of ketamine?

Which of the following are types of intravenous general anesthetics? (Select all that apply.)

Recovery from a single intravenous dose of thiopental (sodium pentothal)is the result of:

The more soluble the anesthetic is in body tissues, the more rapid the onset and recovery will be.

Approximately 15% of halothane is metabolized in the liver, and these metabolites have been suggested as a cause of renal damage.

Nitrous oxide combined with oxygen (N₂O/O₂)has become a primary part of dental office _____ procedures.

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