BIO 290 Exam 1 Actual Exam V2 | BIO 290 Pharmacology (BIO290
Exam 1) | Joyce University
1. Which phase of pharmacokinetics involves the movement of a drug from its site of
administration into the bloodstream?
A. Absorption
B. Metabolism
C. Distribution
D. Excretion
Answer: A
Rationale: Absorption is the primary process by which a drug enters the systemic
circulation from the administration site. Factors such as the route of administration and
drug solubility significantly influence the rate and extent of this process. Understanding
absorption is critical for determining the onset of action for various medications.
2. When a drug is administered orally, it must first pass through the liver before reaching the
systemic circulation. This process is known as:
A. The blood-brain barrier
B. The first-pass effect
C. Glomerular filtration
D. Enzyme induction
Answer: B
Rationale: The first-pass effect occurs when a drug is metabolized in the liver after
absorption from the gastrointestinal tract, reducing the concentration of the active drug.
This phenomenon explains why oral doses are often much higher than intravenous doses
for the same medication. Nurses must recognize this effect to anticipate the therapeutic
efficacy and required dosages for their patients.
3. A patient is prescribed a drug with a narrow therapeutic index. What is the most important
nursing action?
A. Monitor blood levels of the drug closely.
B. Administer the drug only as needed (PRN).
C. Inform the patient that side effects are unlikely.
D. Increase the dose if the patient does not feel better.
,Answer: A
Rationale: A narrow therapeutic index indicates that the difference between a therapeutic
dose and a toxic dose is very small. Close monitoring of serum drug levels is essential to
ensure safety and prevent toxicity in the patient. This vigilance is a cornerstone of safe
medication administration for drugs like lithium or digoxin.
4. Which of the following describes an ‘agonist’ drug?
A. A drug that blocks a receptor to prevent a response.
B. A drug that is used solely to counteract an overdose.
C. A drug that has no effect on receptors.
D. A drug that binds to a receptor and produces a biological response.
Answer: D
Rationale: An agonist is a chemical that binds to a receptor and activates the receptor to
produce a biological response. It mimics the action of endogenous substances that normally
interact with that receptor. Understanding the difference between agonists and antagonists
is fundamental to pharmacodynamics.
5. The time required for the amount of drug in the body to decrease by 50% is called:
A. Onset of action
B. Half-life
C. Duration of action
D. Peak effect
Answer: B
Rationale: Half-life is a pharmacokinetic parameter that measures how long it takes for the
concentration of a drug in the plasma to reduce by half. This value helps determine the
dosing interval required to maintain steady-state levels in the patient. It varies significantly
between different medications and is influenced by the patient’s renal and hepatic function.
6. Which organ is primarily responsible for the metabolism of most drugs?
A. Kidneys
B. Lungs
C. Pancreas
D. Liver
Answer: D
, Rationale: The liver is the primary site of drug metabolism, utilizing the cytochrome P450
enzyme system to chemically alter drugs. Metabolism usually converts lipid-soluble drugs
into water-soluble metabolites that can be easily excreted. Impaired liver function can lead
to drug accumulation and potential toxicity, requiring dose adjustments.
7. A nurse is preparing to administer a medication. Which ‘right’ of medication administration
is being practiced when the nurse checks the patient’s wristband?
A. Right dose
B. Right route
C. Right patient
D. Right time
Answer: C
Rationale: Verifying the patient’s identity using two identifiers, such as a name and date of
birth, ensures the right patient receives the medication. This is a critical safety step
designed to prevent medication errors in clinical settings. The nurse must always verify the
identity before every administration regardless of how well they know the patient.
8. What happens to a drug that is highly protein-bound in the blood?
A. It is immediately excreted by the kidneys.
B. The bound portion is pharmacologically inactive.
C. It crosses the blood-brain barrier more easily.
D. It has a very short duration of action.
Answer: B
Rationale: Drugs that bind to proteins like albumin are unable to leave the bloodstream
and reach their target receptors, making the bound portion inactive. Only the ‘free’ or
unbound drug can exert a therapeutic effect on the body. Competition for protein-binding
sites can lead to drug-drug interactions and increased free drug levels.
9. Which route of administration provides the fastest absorption and onset of action?
A. Intravenous
B. Intramuscular
C. Subcutaneous
D. Oral
Answer: A
Rationale: The intravenous route delivers medication directly into the bloodstream,
bypassing all absorption barriers. This results in an immediate onset of action, which is
Exam 1) | Joyce University
1. Which phase of pharmacokinetics involves the movement of a drug from its site of
administration into the bloodstream?
A. Absorption
B. Metabolism
C. Distribution
D. Excretion
Answer: A
Rationale: Absorption is the primary process by which a drug enters the systemic
circulation from the administration site. Factors such as the route of administration and
drug solubility significantly influence the rate and extent of this process. Understanding
absorption is critical for determining the onset of action for various medications.
2. When a drug is administered orally, it must first pass through the liver before reaching the
systemic circulation. This process is known as:
A. The blood-brain barrier
B. The first-pass effect
C. Glomerular filtration
D. Enzyme induction
Answer: B
Rationale: The first-pass effect occurs when a drug is metabolized in the liver after
absorption from the gastrointestinal tract, reducing the concentration of the active drug.
This phenomenon explains why oral doses are often much higher than intravenous doses
for the same medication. Nurses must recognize this effect to anticipate the therapeutic
efficacy and required dosages for their patients.
3. A patient is prescribed a drug with a narrow therapeutic index. What is the most important
nursing action?
A. Monitor blood levels of the drug closely.
B. Administer the drug only as needed (PRN).
C. Inform the patient that side effects are unlikely.
D. Increase the dose if the patient does not feel better.
,Answer: A
Rationale: A narrow therapeutic index indicates that the difference between a therapeutic
dose and a toxic dose is very small. Close monitoring of serum drug levels is essential to
ensure safety and prevent toxicity in the patient. This vigilance is a cornerstone of safe
medication administration for drugs like lithium or digoxin.
4. Which of the following describes an ‘agonist’ drug?
A. A drug that blocks a receptor to prevent a response.
B. A drug that is used solely to counteract an overdose.
C. A drug that has no effect on receptors.
D. A drug that binds to a receptor and produces a biological response.
Answer: D
Rationale: An agonist is a chemical that binds to a receptor and activates the receptor to
produce a biological response. It mimics the action of endogenous substances that normally
interact with that receptor. Understanding the difference between agonists and antagonists
is fundamental to pharmacodynamics.
5. The time required for the amount of drug in the body to decrease by 50% is called:
A. Onset of action
B. Half-life
C. Duration of action
D. Peak effect
Answer: B
Rationale: Half-life is a pharmacokinetic parameter that measures how long it takes for the
concentration of a drug in the plasma to reduce by half. This value helps determine the
dosing interval required to maintain steady-state levels in the patient. It varies significantly
between different medications and is influenced by the patient’s renal and hepatic function.
6. Which organ is primarily responsible for the metabolism of most drugs?
A. Kidneys
B. Lungs
C. Pancreas
D. Liver
Answer: D
, Rationale: The liver is the primary site of drug metabolism, utilizing the cytochrome P450
enzyme system to chemically alter drugs. Metabolism usually converts lipid-soluble drugs
into water-soluble metabolites that can be easily excreted. Impaired liver function can lead
to drug accumulation and potential toxicity, requiring dose adjustments.
7. A nurse is preparing to administer a medication. Which ‘right’ of medication administration
is being practiced when the nurse checks the patient’s wristband?
A. Right dose
B. Right route
C. Right patient
D. Right time
Answer: C
Rationale: Verifying the patient’s identity using two identifiers, such as a name and date of
birth, ensures the right patient receives the medication. This is a critical safety step
designed to prevent medication errors in clinical settings. The nurse must always verify the
identity before every administration regardless of how well they know the patient.
8. What happens to a drug that is highly protein-bound in the blood?
A. It is immediately excreted by the kidneys.
B. The bound portion is pharmacologically inactive.
C. It crosses the blood-brain barrier more easily.
D. It has a very short duration of action.
Answer: B
Rationale: Drugs that bind to proteins like albumin are unable to leave the bloodstream
and reach their target receptors, making the bound portion inactive. Only the ‘free’ or
unbound drug can exert a therapeutic effect on the body. Competition for protein-binding
sites can lead to drug-drug interactions and increased free drug levels.
9. Which route of administration provides the fastest absorption and onset of action?
A. Intravenous
B. Intramuscular
C. Subcutaneous
D. Oral
Answer: A
Rationale: The intravenous route delivers medication directly into the bloodstream,
bypassing all absorption barriers. This results in an immediate onset of action, which is
