AGENTS, CONTROLLING THE FUNCTIONS OF THE PERIPHERAL NERVOUS SYSTEM- PART I.1 Local anesthetics

001. Local anesthetics produce:
a) Analgesia, amnesia, loss of consciousness
b) Blocking pain sensation without loss of consciousness
c) Alleviation of anxiety and pain with an altered level of consciousness
d) A stupor or somnolent state
002. A good local anesthetic agent shouldn’t cause:
a) Local irritation and tissue damage
b) Systemic toxicity
c) Fast onset and long duration of action
d) Vasodilatation
003. Most local anesthetic agents consist of:
a) Lipophylic group (frequently an aromatic ring)
b) Intermediate chain (commonly including an ester or amide)
c) Amino group
d) All of the above
004. Which one of the following groups is responsible for the duration of the local anesthetic action?
a) Intermediate chain
b) Lipophylic group
c) Ionizable group
d) All of the above
005. Indicate the local anesthetic agent, which has a shorter duration of action:
a) Lidocaine
b) Procaine
c) Bupivacaine
d) Ropivacaine
006. Which one of the following groups is responsible for the potency and the toxicity of local anesthetics?
a) Ionizable group
b) Intermediate chain
c) Lipophylic group
d) All of the above
007. Indicate the drug, which has greater potency of the local anesthetic action:
a) Lidocaine
b) Bupivacaine
c) Procaine
d) Mepivacaine
008. Ionizable group is responsible for:
a) The potency and the toxicity
b) The duration of action
c) The ability to diffuse to the site of action
d) All of the above
009. Which one of the following local anesthetics is an ester of benzoic acid?
a) Lidocaine
b) Procaine
c) Ropivacaine
d) Cocaine
010. Indicate the local anesthetic, which is an ester of paraaminobenzoic acid:
a) Mepivacaine
b) Cocaine
c) Procaine
d) Lidocaine
011. Which of the following local anesthetics is an acetanilide derivative?
a) Tetracaine
b) Lidocaine
c) Cocaine
d) Procaine
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012. Indicate the local anesthetic, which is a toluidine derivative:
a) Lidocaine
b) Bupivacaine
c) Prilocaine
d) Procaine
013. Which of the following local anesthetics is a thiophene derivative?
a) Procaine
b) Ultracaine
c) Lidocaine
d) Mepivacaine
014. Local anesthetics are:
a) Weak bases
b) Weak acids
c) Salts
d) None of the above
015. For therapeutic application local anesthetics are usually made available as salts for the reasons of:
a) Less toxicity and higher potency
b) Higher stability and greater lipid solubility
c) Less local tissue damage and more potency
d) More stability and greater water solubility
016. Which of the following statements is not correct for local anesthetics?
a) In a tissue they exist either as an uncharged base or as a cation
b) A charged cationic form penetrates biologic membranes more readily than an uncharged form
c) Local anesthetics are much less effective in inflamed tissues
d) Low ph in inflamed tissues decreases the dissociation of nonionized molecules
017. Which one of the following statements about the metabolism of local anesthetics is incorrect?
a) Metabolism of local anesthetics occurs at the site of administration
b) Metabolism occurs in the plasma or liver but not at the site of administration
c) Ester group of anesthetics like procaine, are metabolized systemically by pseudocholinesterase
d) Amides such as lidocaine, are metabolized in the liver by microsomal mixed function oxidases
018. Indicate the anesthetic agent of choice in patient with a liver disease:
a) Lidocaine
b) Bupivacaine
c) Procaine
d) Etidocaine
019. Which of the following local anesthetics is preferable in patient with pseudocholinesterase deficiency?
a) Procaine
b) Ropivacaine
c) Tetracaine
d) Benzocaine
020. The primary mechanism of action of local anesthetics is:
a) Activation of ligand-gated potassium channels
b) Blockade of voltage-gated sodium channels
c) Stimulation of voltage-gated N-type calcium channels
d) Blockade the GABA-gated chloride channels
021. Which of the following local anesthetics is more water-soluble?
a) Tetracaine
b) Etidocaine
c) Procaine
d) Bupivacaine
022. Indicate the local anesthetic, which is more lipid-soluble:
a) Bupivacaine
b) Lidocaine
c) Mepivacaine
d) Procaine