FPGEE Trivia FPGEE Exam 4 — Questions and Answers
Question 1: What term describes a drug that binds to a receptor and produces a submaximal response compared to a full agonist?
- Antagonist
- Partial agonist (Correct answer)
- Inverse agonist
- Competitive inhibitor
Correct answer: Partial agonist
A partial agonist activates receptors but cannot produce the maximal response that a full agonist can.
Question 2: Which class of antibiotics inhibits bacterial cell wall synthesis by binding penicillin-binding proteins?
- Aminoglycosides
- Fluoroquinolones
- Beta-lactams (Correct answer)
- Macrolides
Correct answer: Beta-lactams
Beta-lactam antibiotics (penicillins, cephalosporins, carbapenems) inhibit cell wall synthesis via PBP binding.
Question 3: What is the Henderson-Hasselbalch equation used for in pharmacokinetics?
- Calculating drug clearance
- Predicting the ionization state of a drug at a given pH (Correct answer)
- Estimating volume of distribution
- Calculating creatinine clearance
Correct answer: Predicting the ionization state of a drug at a given pH
The Henderson-Hasselbalch equation relates pH, pKa, and the ratio of ionized to unionized drug forms.
Question 4: A patient on MAO inhibitors consumes tyramine-rich foods. What serious reaction may occur?
- Serotonin syndrome
- Hypertensive crisis (Correct answer)
- Anticholinergic toxidrome
- Neuroleptic malignant syndrome
Correct answer: Hypertensive crisis
MAO inhibitors block tyramine metabolism, causing massive norepinephrine release and hypertensive crisis.
Question 5: Which hepatic function test is most specific for hepatocellular damage?
- Alkaline phosphatase
- Gamma-glutamyl transferase
- Alanine aminotransferase (ALT) (Correct answer)
- Total bilirubin
Correct answer: Alanine aminotransferase (ALT)
ALT is predominantly found in hepatocytes, making it the most specific marker for hepatocellular injury.
Question 6: What is the mechanism by which proton pump inhibitors reduce gastric acid?
- Block H2 receptors on parietal cells
- Irreversibly inhibit H+/K+-ATPase (Correct answer)
- Neutralize gastric acid directly
- Decrease gastrin secretion
Correct answer: Irreversibly inhibit H+/K+-ATPase
PPIs irreversibly bind and inhibit the H+/K+-ATPase (proton pump) on gastric parietal cells.
Question 7: Which electrolyte replacement is most critical to monitor when a patient is on digoxin therapy?
- Sodium
- Calcium
- Potassium (Correct answer)
- Phosphate
Correct answer: Potassium
Hypokalemia increases digoxin toxicity because potassium and digoxin compete for the same Na+/K+-ATPase binding site.
FPGEE Trivia FPGEE Exam 4
What term describes a drug that binds to a receptor and produces a submaximal response compared to a full agonist?