And Answers SNHU
Q1. Which statement best defines pharmacokinetics?
A) The relationship between a drug and its receptor response
B) The maximum effect a medication can produce
C) The processes of absorption, distribution, metabolism, and excretion of a
drug
D) The clinical comparison of two treatment guidelines
Correct Answer: C) The processes of absorption, distribution, metabolism,
and excretion of a drug
Rationale: Pharmacokinetics describes what the body does to a medication
through absorption, distribution, metabolism, and elimination.
Q2. Which characteristic indicates that a medication has a narrow
therapeutic index?
A) Therapeutic and toxic concentrations are relatively close together.
B) The medication has poor oral absorption.
C) The medication acts at multiple receptors.
D) The medication has a prolonged half-life.
Correct Answer: A) Therapeutic and toxic concentrations are relatively close
together.
Rationale: Narrow-therapeutic-index medications have a relatively small
margin between effective and harmful exposure and often require closer
monitoring.
Q3. What is the primary purpose of administering a loading dose?
A) Prevent all first-pass metabolism
B) Achieve a therapeutic concentration more rapidly
C) Reduce protein binding
D) Shorten the elimination half-life
Correct Answer: B) Achieve a therapeutic concentration more rapidly
Rationale: A loading dose rapidly establishes a target drug concentration
when waiting several half-lives for accumulation would delay treatment.
Q4. A strong inhibitor is added to a medication that is extensively
metabolized by the inhibited CYP enzyme. What is the expected
effect?
A) The substrate medication concentration may increase and toxicity risk
may rise.
B) The substrate is eliminated more rapidly.
C) Bioavailability always becomes zero.
, D) The drug automatically becomes inactive.
Correct Answer: A) The substrate medication concentration may increase and
toxicity risk may rise.
Rationale: Enzyme inhibition can reduce metabolic clearance and increase
systemic drug exposure.
Q5. Severe hypoalbuminemia develops in a patient taking a highly
protein-bound medication. Which effect may occur?
A) Complete loss of gastrointestinal absorption
B) Immediate elimination of the drug
C) Increased free-drug concentration and potential toxicity
D) Permanent reduction in receptor sensitivity
Correct Answer: C) Increased free-drug concentration and potential toxicity
Rationale: Less albumin can leave a larger fraction of medication unbound
and pharmacologically active.
Q6. Which patient factor is most important when dosing a
medication that is primarily eliminated unchanged by the kidneys?
A) Skin pigmentation
B) Visual acuity
C) Renal function
D) Hand dominance
Correct Answer: C) Renal function
Rationale: Reduced kidney function can slow elimination and cause
accumulation of renally cleared medications.
Q7. Which statement best describes a competitive receptor
antagonist?
A) It activates the receptor more strongly than an agonist.
B) It irreversibly destroys the receptor.
C) It increases receptor synthesis.
D) It occupies the receptor without activating it and competes with an
agonist.
Correct Answer: D) It occupies the receptor without activating it and
competes with an agonist.
Rationale: Competitive antagonists reduce agonist activity by competing for
the same receptor-binding site.
CHAPTER 2 — CARDIOVASCULAR, RENAL, AND HEART-FAILURE
PHARMACOTHERAPY