NURS 251 Module 1 Exam V1 | NURS 251
Module 1 Exam – Pharmacology | Portage |
Q&A with Rationale (Portage NURS 251
Module 1 Exam)
1. Which phase of pharmacokinetics involves the movement of a drug from its site of
administration into the bloodstream?
A. Metabolism
B. Distribution
C. Absorption
D. Excretion
Answer: C
Rationale: Absorption is the process by which a drug enters the systemic circulation from
the site of entry. This process is influenced by the route of administration, drug solubility,
and blood flow to the site. Understanding absorption is critical for determining the onset of
a drug’s therapeutic action.
2. A patient is receiving an oral medication that undergoes significant first-pass metabolism.
What does this mean for the drug’s bioavailability?
A. Bioavailability will be significantly reduced before reaching systemic circulation.
B. The drug will have 100% bioavailability.
,C. The drug will be absorbed faster in the small intestine.
D. Bioavailability will increase as it passes through the liver.
Answer: A
Rationale: The first-pass effect occurs when a drug is metabolized by the liver immediately
after absorption from the gastrointestinal tract. This process reduces the concentration of
the active drug before it reaches the rest of the body. Consequently, oral doses often need
to be higher than parenteral doses to achieve the same effect.
3. Which term describes the study of what the drug does to the body, including the
mechanism of action?
A. Pharmacokinetics
B. Pharmacogenomics
C. Pharmacotherapeutics
D. Pharmacodynamics
Answer: D
Rationale: Pharmacodynamics focuses on the biochemical and physiological effects of
drugs on the body. It involves the interaction between drug molecules and their targets,
such as receptors or enzymes. This field helps clinicians understand how a drug produces
its intended therapeutic response.
, 4. A drug with a high therapeutic index is considered:
A. Highly dangerous and requires constant monitoring.
B. Relatively safe with a low risk of toxicity.
C. Likely to cause immediate adverse reactions.
D. Ineffective for treating chronic conditions.
Answer: B
Rationale: The therapeutic index is a ratio that compares the blood concentration at which
a drug becomes toxic to the concentration at which the drug is effective. A high index
indicates a large safety margin between the therapeutic and toxic doses. Drugs with a low
therapeutic index require much more precise dosing and frequent blood level monitoring.
5. What is the primary organ responsible for drug metabolism in the human body?
A. Kidneys
B. Lungs
C. Pancreas
D. Liver
Answer: D
Rationale: The liver is the central site for biotransformation, utilizing enzymes like the
Cytochrome P450 system to alter drug molecules. Metabolism typically converts lipid-
Module 1 Exam – Pharmacology | Portage |
Q&A with Rationale (Portage NURS 251
Module 1 Exam)
1. Which phase of pharmacokinetics involves the movement of a drug from its site of
administration into the bloodstream?
A. Metabolism
B. Distribution
C. Absorption
D. Excretion
Answer: C
Rationale: Absorption is the process by which a drug enters the systemic circulation from
the site of entry. This process is influenced by the route of administration, drug solubility,
and blood flow to the site. Understanding absorption is critical for determining the onset of
a drug’s therapeutic action.
2. A patient is receiving an oral medication that undergoes significant first-pass metabolism.
What does this mean for the drug’s bioavailability?
A. Bioavailability will be significantly reduced before reaching systemic circulation.
B. The drug will have 100% bioavailability.
,C. The drug will be absorbed faster in the small intestine.
D. Bioavailability will increase as it passes through the liver.
Answer: A
Rationale: The first-pass effect occurs when a drug is metabolized by the liver immediately
after absorption from the gastrointestinal tract. This process reduces the concentration of
the active drug before it reaches the rest of the body. Consequently, oral doses often need
to be higher than parenteral doses to achieve the same effect.
3. Which term describes the study of what the drug does to the body, including the
mechanism of action?
A. Pharmacokinetics
B. Pharmacogenomics
C. Pharmacotherapeutics
D. Pharmacodynamics
Answer: D
Rationale: Pharmacodynamics focuses on the biochemical and physiological effects of
drugs on the body. It involves the interaction between drug molecules and their targets,
such as receptors or enzymes. This field helps clinicians understand how a drug produces
its intended therapeutic response.
, 4. A drug with a high therapeutic index is considered:
A. Highly dangerous and requires constant monitoring.
B. Relatively safe with a low risk of toxicity.
C. Likely to cause immediate adverse reactions.
D. Ineffective for treating chronic conditions.
Answer: B
Rationale: The therapeutic index is a ratio that compares the blood concentration at which
a drug becomes toxic to the concentration at which the drug is effective. A high index
indicates a large safety margin between the therapeutic and toxic doses. Drugs with a low
therapeutic index require much more precise dosing and frequent blood level monitoring.
5. What is the primary organ responsible for drug metabolism in the human body?
A. Kidneys
B. Lungs
C. Pancreas
D. Liver
Answer: D
Rationale: The liver is the central site for biotransformation, utilizing enzymes like the
Cytochrome P450 system to alter drug molecules. Metabolism typically converts lipid-
