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→Agonists
An agonist can be defined as '''a drug that binds to a target molecule and results in activation of the receptor and thus a tissue response'''.
An agonist can be defined as '''a drug that binds to a target molecule and results in activation of the receptor and thus a tissue response'''.
* An agonist forms a complex with the receptor. This complex is '''dynamic''' as the agonist will continously dissociate and associate with the receptor. The agonist will continue to do this and thus producing a response, until the concentration of the agonist is reduced to a level at which no tissue response occurs.
* The rate of complex fromation is dependent on two factors: '''agonist concentration''' and the '''number of free receptors'''.
* The '''affinty''' of a drug to a receptor varies and can be compared using the '''equilinbrum constant or KA'''.