D398 HLTH 2422
Introduction to Pharmacology
Final Assessments
2025 Versions
Which phase of pharmacokinetics primarily involves the chemical alteration
of a drug in the liver?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Answer: C) Metabolism
Rationale: Metabolism refers to the biotransformation of drugs, mainly
occurring in the liver, where drugs are converted into more water-soluble
metabolites for easier excretion.
2.
Which route of administration provides the fastest onset of drug action?
A) Oral
B) Subcutaneous
C) Intravenous
D) Intramuscular
Answer: C) Intravenous
Rationale: Intravenous administration delivers the drug directly into the
bloodstream, resulting in immediate onset and 100% bioavailability.
3.
A nurse is administering a highly protein-bound medication. What potential
impact does low serum albumin have on the patient’s drug effect?
A) Reduced drug toxicity
B) Increased free drug concentration and toxicity risk
C) No impact on drug effect
D) Enhanced drug excretion
Answer: B) Increased free drug concentration and toxicity risk
Rationale: Low serum albumin decreases protein binding, increasing free
,(active) drug levels, potentially leading to toxicity.
4.
What is the primary organ responsible for drug excretion?
A) Liver
B) Kidney
C) Lungs
D) Skin
Answer: B) Kidney
Rationale: Kidneys filter and excrete drugs and their metabolites via urine,
playing a vital role in drug elimination.
5.
The half-life of a drug is defined as:
A) The time it takes for half the administered dose to be absorbed
B) The time it takes for half of the drug concentration in plasma to be
eliminated
C) The time required to reach maximum plasma concentration
D) The time required for the drug to start acting
Answer: B) The time it takes for half of the drug concentration in plasma to be
eliminated
Rationale: Half-life reflects the rate of elimination and helps determine
dosing intervals.
6.
Which term refers to the drug’s ability to produce the maximum desired
effect?
A) Potency
B) Therapeutic index
C) Efficacy
D) Bioavailability
Answer: C) Efficacy
Rationale: Efficacy indicates the maximal effect a drug can achieve,
regardless of dose.
7.
A nurse administers a medication that acts as an antagonist. This drug:
A) Activates a receptor to produce a response
B) Binds to a receptor and blocks its activation
C) Enhances neurotransmitter release
D) Inhibits drug metabolism
,Answer: B) Binds to a receptor and blocks its activation
Rationale: Antagonists block receptor activity preventing the drug or
endogenous ligand from producing an effect.
8.
During which phase of pharmacokinetics is the drug absorbed through the
gastrointestinal tract?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Answer: A) Absorption
Rationale: Absorption is the process by which drugs pass from the site of
administration into bloodstream, typically through the GI tract for oral meds.
9.
Which of the following factors can decrease drug absorption?
A) High-fat meals
B) Increased gastrointestinal motility
C) Decreased gastric pH
D) Taking medication with water
Answer: B) Increased gastrointestinal motility
Rationale: Rapid GI motility reduces contact time for absorption decreasing
drug bioavailability.
10.
A drug with a narrow therapeutic index requires:
A) Large and infrequent dosing
B) Close monitoring of plasma drug levels
C) No monitoring as it is always safe
D) Administering the drug with food only
Answer: B) Close monitoring of plasma drug levels
Rationale: Narrow therapeutic index drugs have a small margin between
effective and toxic doses, making monitoring critical.
11.
Which enzyme system in the liver is mainly involved in drug metabolism?
A) Monoamine oxidase
B) Cytochrome P450
C) Acetylcholinesterase
, D) Aldehyde dehydrogenase
Answer: B) Cytochrome P450
Rationale: Cytochrome P450 enzymes metabolize many drugs through
oxidation, reduction, or hydrolysis.
12.
The “first-pass effect” reduces the bioavailability of drugs administered by
which route?
A) Intramuscular
B) Oral
C) Intravenous
D) Subcutaneous
Answer: B) Oral
Rationale: Oral drugs pass through the liver before systemic circulation,
where metabolism can significantly reduce active drug levels.
13.
Which factor increases the risk of drug-drug interactions?
A) Using drugs with different metabolic pathways
B) Polypharmacy (multiple drug use)
C) Administering drugs via IV only
D) High albumin levels
Answer: B) Polypharmacy (multiple drug use)
Rationale: Using multiple drugs increases the chance that one drug will alter
pharmacokinetics or effects of another.
14.
What is the primary effect of a competitive antagonist?
A) Irreversibly binds and deactivates receptor
B) Competes with the agonist reversibly to block receptor activation
C) Enhances receptor function
D) Metabolizes the agonist
Answer: B) Competes with the agonist reversibly to block receptor activation
Rationale: Competitive antagonists bind reversibly to the receptor,
competing for the same binding site as agonists.
15.
Pharmacodynamics relates to:
A) How the body absorbs drugs
B) How the drug affects the body
Introduction to Pharmacology
Final Assessments
2025 Versions
Which phase of pharmacokinetics primarily involves the chemical alteration
of a drug in the liver?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Answer: C) Metabolism
Rationale: Metabolism refers to the biotransformation of drugs, mainly
occurring in the liver, where drugs are converted into more water-soluble
metabolites for easier excretion.
2.
Which route of administration provides the fastest onset of drug action?
A) Oral
B) Subcutaneous
C) Intravenous
D) Intramuscular
Answer: C) Intravenous
Rationale: Intravenous administration delivers the drug directly into the
bloodstream, resulting in immediate onset and 100% bioavailability.
3.
A nurse is administering a highly protein-bound medication. What potential
impact does low serum albumin have on the patient’s drug effect?
A) Reduced drug toxicity
B) Increased free drug concentration and toxicity risk
C) No impact on drug effect
D) Enhanced drug excretion
Answer: B) Increased free drug concentration and toxicity risk
Rationale: Low serum albumin decreases protein binding, increasing free
,(active) drug levels, potentially leading to toxicity.
4.
What is the primary organ responsible for drug excretion?
A) Liver
B) Kidney
C) Lungs
D) Skin
Answer: B) Kidney
Rationale: Kidneys filter and excrete drugs and their metabolites via urine,
playing a vital role in drug elimination.
5.
The half-life of a drug is defined as:
A) The time it takes for half the administered dose to be absorbed
B) The time it takes for half of the drug concentration in plasma to be
eliminated
C) The time required to reach maximum plasma concentration
D) The time required for the drug to start acting
Answer: B) The time it takes for half of the drug concentration in plasma to be
eliminated
Rationale: Half-life reflects the rate of elimination and helps determine
dosing intervals.
6.
Which term refers to the drug’s ability to produce the maximum desired
effect?
A) Potency
B) Therapeutic index
C) Efficacy
D) Bioavailability
Answer: C) Efficacy
Rationale: Efficacy indicates the maximal effect a drug can achieve,
regardless of dose.
7.
A nurse administers a medication that acts as an antagonist. This drug:
A) Activates a receptor to produce a response
B) Binds to a receptor and blocks its activation
C) Enhances neurotransmitter release
D) Inhibits drug metabolism
,Answer: B) Binds to a receptor and blocks its activation
Rationale: Antagonists block receptor activity preventing the drug or
endogenous ligand from producing an effect.
8.
During which phase of pharmacokinetics is the drug absorbed through the
gastrointestinal tract?
A) Absorption
B) Distribution
C) Metabolism
D) Excretion
Answer: A) Absorption
Rationale: Absorption is the process by which drugs pass from the site of
administration into bloodstream, typically through the GI tract for oral meds.
9.
Which of the following factors can decrease drug absorption?
A) High-fat meals
B) Increased gastrointestinal motility
C) Decreased gastric pH
D) Taking medication with water
Answer: B) Increased gastrointestinal motility
Rationale: Rapid GI motility reduces contact time for absorption decreasing
drug bioavailability.
10.
A drug with a narrow therapeutic index requires:
A) Large and infrequent dosing
B) Close monitoring of plasma drug levels
C) No monitoring as it is always safe
D) Administering the drug with food only
Answer: B) Close monitoring of plasma drug levels
Rationale: Narrow therapeutic index drugs have a small margin between
effective and toxic doses, making monitoring critical.
11.
Which enzyme system in the liver is mainly involved in drug metabolism?
A) Monoamine oxidase
B) Cytochrome P450
C) Acetylcholinesterase
, D) Aldehyde dehydrogenase
Answer: B) Cytochrome P450
Rationale: Cytochrome P450 enzymes metabolize many drugs through
oxidation, reduction, or hydrolysis.
12.
The “first-pass effect” reduces the bioavailability of drugs administered by
which route?
A) Intramuscular
B) Oral
C) Intravenous
D) Subcutaneous
Answer: B) Oral
Rationale: Oral drugs pass through the liver before systemic circulation,
where metabolism can significantly reduce active drug levels.
13.
Which factor increases the risk of drug-drug interactions?
A) Using drugs with different metabolic pathways
B) Polypharmacy (multiple drug use)
C) Administering drugs via IV only
D) High albumin levels
Answer: B) Polypharmacy (multiple drug use)
Rationale: Using multiple drugs increases the chance that one drug will alter
pharmacokinetics or effects of another.
14.
What is the primary effect of a competitive antagonist?
A) Irreversibly binds and deactivates receptor
B) Competes with the agonist reversibly to block receptor activation
C) Enhances receptor function
D) Metabolizes the agonist
Answer: B) Competes with the agonist reversibly to block receptor activation
Rationale: Competitive antagonists bind reversibly to the receptor,
competing for the same binding site as agonists.
15.
Pharmacodynamics relates to:
A) How the body absorbs drugs
B) How the drug affects the body
