FACTOID # 138: Libya’s full name is the Great Socialist People’s Libyan Arab Jamahiriya.
 
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Encyclopedia > Competitive antagonist

A competitive antagonist is a receptor antagonist which binds to a receptor but fails to activate it. If an agonist competes with a competitive antagonist for the same binding site on the same receptor, the agonist molecules can be displaced from the binding site, resulting in a lower frequency of receptor activation.


  Results from FactBites:
 
Receptor antagonist - Wikipedia, the free encyclopedia (417 words)
In medicine and biology, a receptor antagonist is a ligand that inhibits the function of an agonist and inverse agonist for a specific receptor.
Unlike competitive antagonism, the covalent nature of the bond means the antagonist cannot be displaced by raising the concentration of the agonist.
The antagonist which is bound is usually the one with the higher affinity for the receptor.
Receptor Workbook (3901 words)
An antagonist which binds to the receptor in a reversible manner is referred to as a competitive antagonist.
Therefore, the major effect of a competitive antagonist is to shift the dose-response curve for an agonist to the right.
Prazosin is a competitive antagonist at the same receptor phenylephrine acts.
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