NSG124 / NSG 124 Exam 1 (Latest 2024 /
2025 Update): Pharmacology | Guide
with Questions and Verified Answers |
100% Correct | Graded A - Herzing
1. What is the definition of pharmacokinetics?
A) The study of drug effects on the body (what the drug does to the body)
B) The study of drug movement through the body (absorption, distribution,
metabolism, excretion)
C) The study of drug interactions
D) The study of drug toxicity
Rationale: Pharmacokinetics describes what the body does to the drug:
Absorption, Distribution, Metabolism, and Excretion (ADME). Pharmacodynamics
describes what the drug does to the body.
2. Which route of administration has the fastest onset of action?
A) Oral
B) Subcutaneous
C) Intramuscular
D) Intravenous
,Rationale: IV administration delivers the drug directly into the bloodstream,
achieving 100% bioavailability and the fastest onset. Oral drugs must be absorbed
through the GI tract.
3. Bioavailability refers to:
A) The percentage of an administered drug that reaches systemic circulation
B) The time it takes for a drug to reach peak concentration
C) The amount of drug excreted in urine
D) The binding of drug to plasma proteins
*Rationale: Bioavailability (F) is the fraction of an administered dose that reaches
systemic circulation unchanged. IV drugs have 100% bioavailability; oral drugs
have lower bioavailability due to first-pass metabolism*.
4. The "first-pass effect" refers to:
A) Metabolism of a drug in the liver before it reaches systemic circulation
B) The binding of a drug to plasma proteins
C) The excretion of a drug in urine
D) The distribution of a drug to tissues
Rationale: Orally administered drugs are absorbed from the GI tract and travel
via the portal vein to the liver, where they may be extensively metabolized before
reaching systemic circulation. This reduces bioavailability.
,5. A patient is prescribed a medication that has a high first-pass effect. The
nurse understands that this means:
A) The medication will be rapidly excreted by the kidneys
B) The medication will have a prolonged half-life
C) A significant amount of the medication will be inactivated by the liver
before reaching systemic circulation when given orally
D) The medication is more likely to cause allergic reactions
Rationale: High first-pass effect means a large portion of an orally administered
drug is metabolized by the liver before reaching systemic circulation, reducing its
bioavailability.
6. Which organ is primarily responsible for drug metabolism
(biotransformation)?
A) Liver
B) Kidney
C) Lungs
D) Intestines
Rationale: The liver is the primary site of drug metabolism via Phase I (CYP450
enzymes) and Phase II (conjugation) reactions.
7. Which organ is primarily responsible for drug excretion (elimination)?
A) Kidney
B) Liver
, C) Lungs
D) Skin
Rationale: The kidneys (glomerular filtration, tubular secretion) are the primary
organs for drug excretion.
8. Half-life (t½) of a drug is defined as:
A) The time required for a drug to reach peak concentration
B) The time required for a drug to be absorbed
C) The time required for a drug to be distributed to tissues
D) The time required for the plasma concentration to decrease by 50%
*Rationale: Half-life is the time required for the plasma concentration of a drug to
decrease by 50% during elimination. It determines dosing frequency*.
9. A drug with a short half-life (e.g., 2 hours) is typically administered:
A) More frequently (every 4-6 hours)
B) Less frequently (once daily)
C) Only once
D) Never
Rationale: Drugs with short half-lives require more frequent administration to
maintain therapeutic levels.
2025 Update): Pharmacology | Guide
with Questions and Verified Answers |
100% Correct | Graded A - Herzing
1. What is the definition of pharmacokinetics?
A) The study of drug effects on the body (what the drug does to the body)
B) The study of drug movement through the body (absorption, distribution,
metabolism, excretion)
C) The study of drug interactions
D) The study of drug toxicity
Rationale: Pharmacokinetics describes what the body does to the drug:
Absorption, Distribution, Metabolism, and Excretion (ADME). Pharmacodynamics
describes what the drug does to the body.
2. Which route of administration has the fastest onset of action?
A) Oral
B) Subcutaneous
C) Intramuscular
D) Intravenous
,Rationale: IV administration delivers the drug directly into the bloodstream,
achieving 100% bioavailability and the fastest onset. Oral drugs must be absorbed
through the GI tract.
3. Bioavailability refers to:
A) The percentage of an administered drug that reaches systemic circulation
B) The time it takes for a drug to reach peak concentration
C) The amount of drug excreted in urine
D) The binding of drug to plasma proteins
*Rationale: Bioavailability (F) is the fraction of an administered dose that reaches
systemic circulation unchanged. IV drugs have 100% bioavailability; oral drugs
have lower bioavailability due to first-pass metabolism*.
4. The "first-pass effect" refers to:
A) Metabolism of a drug in the liver before it reaches systemic circulation
B) The binding of a drug to plasma proteins
C) The excretion of a drug in urine
D) The distribution of a drug to tissues
Rationale: Orally administered drugs are absorbed from the GI tract and travel
via the portal vein to the liver, where they may be extensively metabolized before
reaching systemic circulation. This reduces bioavailability.
,5. A patient is prescribed a medication that has a high first-pass effect. The
nurse understands that this means:
A) The medication will be rapidly excreted by the kidneys
B) The medication will have a prolonged half-life
C) A significant amount of the medication will be inactivated by the liver
before reaching systemic circulation when given orally
D) The medication is more likely to cause allergic reactions
Rationale: High first-pass effect means a large portion of an orally administered
drug is metabolized by the liver before reaching systemic circulation, reducing its
bioavailability.
6. Which organ is primarily responsible for drug metabolism
(biotransformation)?
A) Liver
B) Kidney
C) Lungs
D) Intestines
Rationale: The liver is the primary site of drug metabolism via Phase I (CYP450
enzymes) and Phase II (conjugation) reactions.
7. Which organ is primarily responsible for drug excretion (elimination)?
A) Kidney
B) Liver
, C) Lungs
D) Skin
Rationale: The kidneys (glomerular filtration, tubular secretion) are the primary
organs for drug excretion.
8. Half-life (t½) of a drug is defined as:
A) The time required for a drug to reach peak concentration
B) The time required for a drug to be absorbed
C) The time required for a drug to be distributed to tissues
D) The time required for the plasma concentration to decrease by 50%
*Rationale: Half-life is the time required for the plasma concentration of a drug to
decrease by 50% during elimination. It determines dosing frequency*.
9. A drug with a short half-life (e.g., 2 hours) is typically administered:
A) More frequently (every 4-6 hours)
B) Less frequently (once daily)
C) Only once
D) Never
Rationale: Drugs with short half-lives require more frequent administration to
maintain therapeutic levels.
