1|Page
Dental Hygiene Local Anesthesia Exam | 2026 Edition
– 50 Actual Exam Questions with 100% Verified
Answers||Verified Exam!!! (Graded A+ | Updated
Clinical Standards)||Newest Exam!!
describe the polarization of a nerve cell: - Answers-at rest,
inside of a cell is slightly (-) charged and outside is lightly
(+) charged. (70 mv) difference.
describe the depolarization of a nerve cell: - Answers-
when there is an influx of Na+ ions and it causes the cell
to become depolarized with a (+) charge.
describe the repolarization of a nerve cell: - Answers-
begins immediately after depolarization with potassium (+)
ions leaving the cell in order to restore equilibrium.
myelinated nerves conduct impulses _________ with
________ energy. - Answers-faster; less
what do the nodes of ranvier on myelinated nerves allow
for? - Answers-the passage of local anesthesia into the
nerve cell.
,2|Page
what is the primary action of local anesthetics? - Answers-
to block pain perception/transmission by decreasing
permeability of sodium ions.
where does the biotransformation of esters occur? -
Answers-in the pseudocholinesterase of blood plasma and
is then excreted by the kidneys.
where does the biotransformation of amides occur? -
Answers-in the liver and is then excreted by the kidneys.
which local anesthetic type is less likely to admit an
allergic reaction? - Answers-amides
___________ are readily hydrolyzed in aqueous solutions,
and _____________ are resistant to hydrolysis in aqueous
solutions. - Answers-esters; amides
what is the first sensation that is lost with local
anesthetics? - Answers-pain
, 3|Page
what is the function of sodium chloride in local
anesthetics? - Answers-to maintain an isotonic solution
what happens when there is infection in the area of an
injection? - Answers-because of its low pH, local
anesthetic is less effective.
what is the most commonly used local anesthesia without
a vasoconstricter? - Answers-carbocaine 3%
what is the safe does of a vasoconstricter in a healthy
patient? - Answers-.2 mg
what is the safe does of a vasoconstricter for a cardiac
compromised patient? - Answers-.04 mg
what is the advantage of using a vasoconstricter in local
anesthetic? - Answers-they significantly delay absorption
and removal of the local anesthetic solution thus they
provide a much longer time for the completion of a
procedure.
Dental Hygiene Local Anesthesia Exam | 2026 Edition
– 50 Actual Exam Questions with 100% Verified
Answers||Verified Exam!!! (Graded A+ | Updated
Clinical Standards)||Newest Exam!!
describe the polarization of a nerve cell: - Answers-at rest,
inside of a cell is slightly (-) charged and outside is lightly
(+) charged. (70 mv) difference.
describe the depolarization of a nerve cell: - Answers-
when there is an influx of Na+ ions and it causes the cell
to become depolarized with a (+) charge.
describe the repolarization of a nerve cell: - Answers-
begins immediately after depolarization with potassium (+)
ions leaving the cell in order to restore equilibrium.
myelinated nerves conduct impulses _________ with
________ energy. - Answers-faster; less
what do the nodes of ranvier on myelinated nerves allow
for? - Answers-the passage of local anesthesia into the
nerve cell.
,2|Page
what is the primary action of local anesthetics? - Answers-
to block pain perception/transmission by decreasing
permeability of sodium ions.
where does the biotransformation of esters occur? -
Answers-in the pseudocholinesterase of blood plasma and
is then excreted by the kidneys.
where does the biotransformation of amides occur? -
Answers-in the liver and is then excreted by the kidneys.
which local anesthetic type is less likely to admit an
allergic reaction? - Answers-amides
___________ are readily hydrolyzed in aqueous solutions,
and _____________ are resistant to hydrolysis in aqueous
solutions. - Answers-esters; amides
what is the first sensation that is lost with local
anesthetics? - Answers-pain
, 3|Page
what is the function of sodium chloride in local
anesthetics? - Answers-to maintain an isotonic solution
what happens when there is infection in the area of an
injection? - Answers-because of its low pH, local
anesthetic is less effective.
what is the most commonly used local anesthesia without
a vasoconstricter? - Answers-carbocaine 3%
what is the safe does of a vasoconstricter in a healthy
patient? - Answers-.2 mg
what is the safe does of a vasoconstricter for a cardiac
compromised patient? - Answers-.04 mg
what is the advantage of using a vasoconstricter in local
anesthetic? - Answers-they significantly delay absorption
and removal of the local anesthetic solution thus they
provide a much longer time for the completion of a
procedure.
