Test Bank: Applied Pharmacology for
the Dental Hygienist (9th Edition) by
Elena Bablenis Haveles – Complete Study
Guide
1. Which pharmacokinetic process describes the movement of a drug from its
site of administration into the systemic circulation?
A. Distribution
B. Metabolism
C. Absorption
D. Excretion
Answer: _C. Absorption_
Rationale: Absorption is the movement of a drug from the site where it is
administered into the bloodstream. Distribution, metabolism, and excretion occur
after absorption.
2. Which organ is primarily responsible for the metabolism of most
medications?
A. Kidney
B. Liver
C. Heart
D. Pancreas
Answer: _B. Liver_
Rationale: The liver contains numerous enzymes that chemically modify drugs,
often making them more water-soluble for subsequent elimination.
3. A medication's half-life refers to the time required for which event?
,A. The drug to reach its peak effect
B. The drug to begin producing an effect
C. The drug concentration in plasma to decrease by 50%
D. The drug to be completely eliminated
Answer: _C. The drug concentration in plasma to decrease by 50%_
Rationale: Half-life is the time needed for the plasma concentration of a drug to
fall by one-half. It helps determine dosing intervals and how long a drug remains
in the body.
4. Which route of administration generally provides the most rapid systemic
drug effect?
A. Oral
B. Intravenous
C. Subcutaneous
D. Topical
Answer: _B. Intravenous_
Rationale: Intravenous administration places the medication directly into the
bloodstream, producing essentially immediate systemic availability.
5. Which term describes the fraction of an administered drug dose that
reaches systemic circulation unchanged?
A. Potency
B. Efficacy
C. Bioavailability
D. Clearance
Answer: _C. Bioavailability_
Rationale: Bioavailability represents the proportion of an administered dose that
reaches systemic circulation in an active form.
6. A patient taking warfarin reports that the gums have begun bleeding more
frequently. What should the dental hygienist recognize?
,A. This may indicate excessive anticoagulant effect
B. This confirms a bacterial infection
C. This is an expected effect of fluoride
D. This indicates inadequate hydration
Answer: _A. This may indicate excessive anticoagulant effect_
Rationale: Warfarin reduces blood clotting and can increase bleeding. Unusual or
excessive gingival bleeding should be documented and communicated
appropriately.
7. Which medication class is primarily used to reduce platelet aggregation?
A. Antiplatelet agents
B. Antacids
C. Antihistamines
D. Bronchodilators
Answer: _A. Antiplatelet agents_
Rationale: Antiplatelet medications decrease platelet aggregation and are
commonly prescribed to reduce the risk of arterial thrombotic events.
8. Which adverse effect is commonly associated with opioid analgesics?
A. Diarrhea
B. Respiratory depression
C. Severe hypertension
D. Increased salivation
Answer: _B. Respiratory depression_
Rationale: Opioids can depress the central nervous system and respiratory drive.
Sedation and constipation are also common adverse effects.
9. Which medication is commonly used as an opioid antagonist in an opioid-
related emergency?
A. Naloxone
B. Lidocaine
, C. Diazepam
D. Diphenhydramine
Answer: _A. Naloxone_
Rationale: Naloxone is an opioid receptor antagonist that can rapidly reverse
opioid-induced respiratory depression.
10. Which local anesthetic property is most important when determining how
long anesthesia will persist?
A. Duration of action
B. Tablet size
C. Drug color
D. Route of elimination only
Answer: _A. Duration of action_
Rationale: The duration of local anesthesia depends on factors such as the
anesthetic agent, dose, vascularity of the injection site, and use of a
vasoconstrictor.
11. Why are vasoconstrictors sometimes combined with local anesthetics?
A. To increase systemic absorption
B. To prolong local anesthetic action and reduce systemic absorption
C. To eliminate all adverse effects
D. To prevent allergic reactions
Answer: _B. To prolong local anesthetic action and reduce systemic absorption_
Rationale: Vasoconstriction slows removal of the local anesthetic from the
injection site, which can prolong anesthesia and reduce the rate of systemic
absorption.
12. Which symptom is most concerning for local anesthetic systemic toxicity?
A. Mild hunger
B. Circumoral numbness followed by CNS symptoms
C. Increased appetite
D. Mild thirst
the Dental Hygienist (9th Edition) by
Elena Bablenis Haveles – Complete Study
Guide
1. Which pharmacokinetic process describes the movement of a drug from its
site of administration into the systemic circulation?
A. Distribution
B. Metabolism
C. Absorption
D. Excretion
Answer: _C. Absorption_
Rationale: Absorption is the movement of a drug from the site where it is
administered into the bloodstream. Distribution, metabolism, and excretion occur
after absorption.
2. Which organ is primarily responsible for the metabolism of most
medications?
A. Kidney
B. Liver
C. Heart
D. Pancreas
Answer: _B. Liver_
Rationale: The liver contains numerous enzymes that chemically modify drugs,
often making them more water-soluble for subsequent elimination.
3. A medication's half-life refers to the time required for which event?
,A. The drug to reach its peak effect
B. The drug to begin producing an effect
C. The drug concentration in plasma to decrease by 50%
D. The drug to be completely eliminated
Answer: _C. The drug concentration in plasma to decrease by 50%_
Rationale: Half-life is the time needed for the plasma concentration of a drug to
fall by one-half. It helps determine dosing intervals and how long a drug remains
in the body.
4. Which route of administration generally provides the most rapid systemic
drug effect?
A. Oral
B. Intravenous
C. Subcutaneous
D. Topical
Answer: _B. Intravenous_
Rationale: Intravenous administration places the medication directly into the
bloodstream, producing essentially immediate systemic availability.
5. Which term describes the fraction of an administered drug dose that
reaches systemic circulation unchanged?
A. Potency
B. Efficacy
C. Bioavailability
D. Clearance
Answer: _C. Bioavailability_
Rationale: Bioavailability represents the proportion of an administered dose that
reaches systemic circulation in an active form.
6. A patient taking warfarin reports that the gums have begun bleeding more
frequently. What should the dental hygienist recognize?
,A. This may indicate excessive anticoagulant effect
B. This confirms a bacterial infection
C. This is an expected effect of fluoride
D. This indicates inadequate hydration
Answer: _A. This may indicate excessive anticoagulant effect_
Rationale: Warfarin reduces blood clotting and can increase bleeding. Unusual or
excessive gingival bleeding should be documented and communicated
appropriately.
7. Which medication class is primarily used to reduce platelet aggregation?
A. Antiplatelet agents
B. Antacids
C. Antihistamines
D. Bronchodilators
Answer: _A. Antiplatelet agents_
Rationale: Antiplatelet medications decrease platelet aggregation and are
commonly prescribed to reduce the risk of arterial thrombotic events.
8. Which adverse effect is commonly associated with opioid analgesics?
A. Diarrhea
B. Respiratory depression
C. Severe hypertension
D. Increased salivation
Answer: _B. Respiratory depression_
Rationale: Opioids can depress the central nervous system and respiratory drive.
Sedation and constipation are also common adverse effects.
9. Which medication is commonly used as an opioid antagonist in an opioid-
related emergency?
A. Naloxone
B. Lidocaine
, C. Diazepam
D. Diphenhydramine
Answer: _A. Naloxone_
Rationale: Naloxone is an opioid receptor antagonist that can rapidly reverse
opioid-induced respiratory depression.
10. Which local anesthetic property is most important when determining how
long anesthesia will persist?
A. Duration of action
B. Tablet size
C. Drug color
D. Route of elimination only
Answer: _A. Duration of action_
Rationale: The duration of local anesthesia depends on factors such as the
anesthetic agent, dose, vascularity of the injection site, and use of a
vasoconstrictor.
11. Why are vasoconstrictors sometimes combined with local anesthetics?
A. To increase systemic absorption
B. To prolong local anesthetic action and reduce systemic absorption
C. To eliminate all adverse effects
D. To prevent allergic reactions
Answer: _B. To prolong local anesthetic action and reduce systemic absorption_
Rationale: Vasoconstriction slows removal of the local anesthetic from the
injection site, which can prolong anesthesia and reduce the rate of systemic
absorption.
12. Which symptom is most concerning for local anesthetic systemic toxicity?
A. Mild hunger
B. Circumoral numbness followed by CNS symptoms
C. Increased appetite
D. Mild thirst
