Which of the following pairings is incorrect?
(i) Proteins essential for the body's communication system — Receptors
(ii) Drugs that imitate the natural chemical messenger by activating the receptor — Antagonists
(iii) Drugs that bind to a receptor and block its normal action — Agonists

Question

Accepted Answer

(d) (ii) and (iii). Receptors are indeed the body's communication proteins, so (i) is correct. A drug that mimics the natural messenger and activates the receptor is an AGONIST (not antagonist), so (ii) is wrong. A drug that binds and blocks the receptor's normal action is an ANTAGONIST (not agonist), so (iii) is wrong. Thus the incorrect pairings are (ii) and (iii).

Which of the following pairings is incorrect? (i) Proteins essential for the body's communication system — Receptors (ii) Drugs that imitate the natural chemical messenger by activating the receptor — Antagonists (iii) Drugs that bind to a receptor and block its normal action — Agonists

Solution

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