VPT-0067
QUESTION
Match the drugs with their mechanisms of action:
| Drugs | Mechanism of Action |
|---|---|
| (a) Phenylephrine | (i) Alpha 2 receptor antagonist |
| (b) Yohimbine | (ii) Beta 2 receptor agonist |
| (c) Clenbuterol | (iii) Beta 1 receptor antagonist |
| (d) Metoprolol | (iv) Alpha 1 receptor agonist |
Match as (a), (b), (c), (d):
OPTIONS
(A) (i), (ii), (iv), (iii)
(B) (iv), (i), (ii), (iii)
(C) (ii), (iv), (i), (iii)
(D) (iii), (i), (iv), (ii)
ANSWER
(B) (iv), (i), (ii), (iii)
EXPLANATION
Phenylephrine is an alpha1 agonist, yohimbine is an alpha2 antagonist, clenbuterol is a beta2 agonist, and metoprolol is a beta1 antagonist. This produces the sequence (iv), (i), (ii), (iii), which is option B; the other sequences misassign at least one drug.
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Veterinary Pharmacology and Toxicology · 167 Questions
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