Veterinary Pharmacology Course Mastery
Guide — 100 Q&A Practice Set
Section 1: Fundamentals & Pharmacokinetics (Q1-15)
1. What is the study of how drugs move through the body called?
A) Pharmacodynamics
B) Pharmacokinetics
C) Pharmacotherapeutics
D) Toxicology
2. Which of the following administration routes bypasses first-pass metabolism?
A) Oral
B) Intravenous
C) Rectal
D) Sublingual
3. The volume of distribution (Vd) is highest for drugs that distribute extensively into:
A) Plasma
B) Fatty tissues
C) Muscle
D) Bone
4. What does a high extraction ratio indicate about a drug’s metabolism?
A) It is poorly absorbed
B) It is highly metabolized by the liver on first pass
C) It is excreted unchanged by the kidneys
D) It has low bioavailability
5. Which species lacks the ability to glucuronidate certain drugs due to low UDP-
glucuronosyltransferase activity?
A) Dog
B) Cat
C) Horse
D) Cow
,6. What term describes the time required for drug concentration to decrease by 50%?
A) Therapeutic index
B) Half-life
C) Clearance
D) Steady state
7. Phase I metabolism typically involves:
A) Conjugation
B) Oxidation by cytochrome P450 enzymes
C) Glucuronidation
D) Acetylation
8. Bioavailability is calculated by comparing the AUC of an extravascular route to:
A) Intramuscular route
B) Subcutaneous route
C) Intravenous route
D) Oral route
9. Which law explains passive diffusion of drugs across membranes?
A) Michaelis-Menten
B) Fick’s Law
C) Henderson-Hasselbalch
D) Stokes’ Law
10. Enterohepatic recirculation can prolong a drug’s effect because it is:
A) Excreted in bile, reabsorbed in intestine
B) Trapped in renal tubules
C) Bound to plasma proteins
D) Metabolized in lungs
11. Weak acids are best absorbed in the:
A) Stomach (acidic environment)
B) Small intestine (alkaline)
C) Colon
D) Mouth
12. The minimum effective concentration (MEC) is part of which pharmacokinetic
parameter?
A) Volume of distribution
B) Therapeutic range
, C) Clearance
D) Loading dose
13. Which parameter is used to calculate a loading dose?
A) Clearance
B) Half-life
C) Volume of distribution
D) Bioavailability
14. What is steady state?
A) When drug absorption equals elimination
B) When the drug is fully distributed
C) When maximum effect is reached
D) When metabolism stops
15. Which of these factors does NOT affect drug distribution?
A) Plasma protein binding
B) Blood flow to tissues
C) Lipid solubility
D) Tablet disintegration time
Section 2: Pharmacodynamics & Drug Receptors (Q16-30)
16. What does pharmacodynamics study?
A) What the body does to the drug
B) What the drug does to the body
C) Drug movement
D) Drug formulation
17. An agonist:
A) Blocks receptors
B) Binds and produces a response
C) Decreases receptor sensitivity
D) Only binds to enzymes
18. The therapeutic index (TI) is calculated as:
A) ED50 / LD50
B) LD50 / ED50
, C) TD50 / ED50
D) ED95 / LD5
19. Which term describes a drug’s ability to produce a maximal response?
A) Potency
B) Efficacy
C) Affinity
D) Tolerance
20. Competitive antagonism can be overcome by:
A) Decreasing agonist dose
B) Increasing agonist concentration
C) Giving an inverse agonist
D) Blocking metabolism
21. Drug tolerance often results from:
A) Increased absorption
B) Receptor up-regulation
C) Receptor down-regulation
D) Faster excretion
22. The ED50 represents:
A) Lethal dose in 50% of animals
B) Effective dose in 50% of animals
C) Toxic dose in 50% of animals
D) Dose causing side effects in 50%
23. Spare receptors are present when:
A) Maximal response occurs without full receptor occupancy
B) No receptors are available
C) All receptors must be occupied for effect
D) Receptors are inactive
24. Which drug-receptor interaction is reversible and competitive?
A) Covalent binding
B) Ionic bonding
C) Hydrogen bonding
D) Allosteric modulation
25. A partial agonist:
A) Has high efficacy alone
Guide — 100 Q&A Practice Set
Section 1: Fundamentals & Pharmacokinetics (Q1-15)
1. What is the study of how drugs move through the body called?
A) Pharmacodynamics
B) Pharmacokinetics
C) Pharmacotherapeutics
D) Toxicology
2. Which of the following administration routes bypasses first-pass metabolism?
A) Oral
B) Intravenous
C) Rectal
D) Sublingual
3. The volume of distribution (Vd) is highest for drugs that distribute extensively into:
A) Plasma
B) Fatty tissues
C) Muscle
D) Bone
4. What does a high extraction ratio indicate about a drug’s metabolism?
A) It is poorly absorbed
B) It is highly metabolized by the liver on first pass
C) It is excreted unchanged by the kidneys
D) It has low bioavailability
5. Which species lacks the ability to glucuronidate certain drugs due to low UDP-
glucuronosyltransferase activity?
A) Dog
B) Cat
C) Horse
D) Cow
,6. What term describes the time required for drug concentration to decrease by 50%?
A) Therapeutic index
B) Half-life
C) Clearance
D) Steady state
7. Phase I metabolism typically involves:
A) Conjugation
B) Oxidation by cytochrome P450 enzymes
C) Glucuronidation
D) Acetylation
8. Bioavailability is calculated by comparing the AUC of an extravascular route to:
A) Intramuscular route
B) Subcutaneous route
C) Intravenous route
D) Oral route
9. Which law explains passive diffusion of drugs across membranes?
A) Michaelis-Menten
B) Fick’s Law
C) Henderson-Hasselbalch
D) Stokes’ Law
10. Enterohepatic recirculation can prolong a drug’s effect because it is:
A) Excreted in bile, reabsorbed in intestine
B) Trapped in renal tubules
C) Bound to plasma proteins
D) Metabolized in lungs
11. Weak acids are best absorbed in the:
A) Stomach (acidic environment)
B) Small intestine (alkaline)
C) Colon
D) Mouth
12. The minimum effective concentration (MEC) is part of which pharmacokinetic
parameter?
A) Volume of distribution
B) Therapeutic range
, C) Clearance
D) Loading dose
13. Which parameter is used to calculate a loading dose?
A) Clearance
B) Half-life
C) Volume of distribution
D) Bioavailability
14. What is steady state?
A) When drug absorption equals elimination
B) When the drug is fully distributed
C) When maximum effect is reached
D) When metabolism stops
15. Which of these factors does NOT affect drug distribution?
A) Plasma protein binding
B) Blood flow to tissues
C) Lipid solubility
D) Tablet disintegration time
Section 2: Pharmacodynamics & Drug Receptors (Q16-30)
16. What does pharmacodynamics study?
A) What the body does to the drug
B) What the drug does to the body
C) Drug movement
D) Drug formulation
17. An agonist:
A) Blocks receptors
B) Binds and produces a response
C) Decreases receptor sensitivity
D) Only binds to enzymes
18. The therapeutic index (TI) is calculated as:
A) ED50 / LD50
B) LD50 / ED50
, C) TD50 / ED50
D) ED95 / LD5
19. Which term describes a drug’s ability to produce a maximal response?
A) Potency
B) Efficacy
C) Affinity
D) Tolerance
20. Competitive antagonism can be overcome by:
A) Decreasing agonist dose
B) Increasing agonist concentration
C) Giving an inverse agonist
D) Blocking metabolism
21. Drug tolerance often results from:
A) Increased absorption
B) Receptor up-regulation
C) Receptor down-regulation
D) Faster excretion
22. The ED50 represents:
A) Lethal dose in 50% of animals
B) Effective dose in 50% of animals
C) Toxic dose in 50% of animals
D) Dose causing side effects in 50%
23. Spare receptors are present when:
A) Maximal response occurs without full receptor occupancy
B) No receptors are available
C) All receptors must be occupied for effect
D) Receptors are inactive
24. Which drug-receptor interaction is reversible and competitive?
A) Covalent binding
B) Ionic bonding
C) Hydrogen bonding
D) Allosteric modulation
25. A partial agonist:
A) Has high efficacy alone
