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An antagonist drug is one that

  • A.increases the amount of receptor made
  • B.binds a receptor without activating it
  • C.activates a receptor more strongly than the natural signal
  • D.destroys the receptor permanently

Answer: B

Occupying the site blocks the natural signal from binding, so the pathway is silenced. Beta blockers work this way on the receptors that adrenaline would otherwise activate. An agonist would do the opposite and stimulate the receptor.

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