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21. Naturally occurring local anaesthetic________________?
A. Cocaine
B. Procaine
C. Lignocaine
D. None of the above
22. All of the following are vasodilators except______________?
A. Cocaine
B. Etomidate
C. Cyclopropane
D. Procaine
23. The drug combination which produces Neuroleptanalgesia is______________?
A. Daroperidol + Fentanyl
B. Deroperidol + Ketamine
C. Droperiodl + Ether
D. Droperiodl + Thiopental sodium + Nitrous oxide
24. The dentist who first used Nitrous oxide for the abolition of pain due to dental extraction was_____________?
A. Harpes David
B. Harvey william
C. Horace wells
D. Hunter John
25. Which of the following anesthetic drugs produces powerful stimulation of the cerebral cortex_____________?
A. Cocaine
B. Procaine
C. Lidocaine
D. Tetracaine
26. Ketamine is a________________?
A. Short general anesthetic agent
B. Local anesthetic agent
C. Antidepressive agent
D. Hypnotic agent
27. Problems associated with nitrous oxide anaesthesia is_____________?
A. Behavioral problem
B. Sensitizes the heart to adrenaline
C. Prolonged difficult induction
D. Tachycardia and or arrhythmias
28. Cardiac arrhythmias are most commonly seen during administration of____________?
A. Thiopental
B. Halothane
C. Ethyl Ether
D. Nitrous oxide
29. Lidocaine produces its antiarrhythmic effects by_____________?
A. Increasing A-V conduction
B. Decreasing cardiac excitability
C. Increasing cardiac conduction velocity
D. Increasing spontaneous pacemaker activity
30. A patient, without prior medication, breathes a gas mixture consisting of 50 percent nitrous oxide and 50 percent oxygen by volume. Which of the following effects would be expected_____________?
A. Analgesia
B. Excitation
C. Surgical anesthesia
D. Respiratory arrest