0 a person who is strongly opposed to something or someone: --
1 a muscle that performs the opposite action to another muscle, for example making a movement slower or returning the body to its original position --
2 a substance that stops or reduces a change or reaction in the body: --
a seratonin antagonist
3 a person who opposes or disagrees with another --
However, such as scheme would imply that inactive analogs would act as antagonists.
To confirm this suggestion, selective antagonists were employed.
Nature and education were thus sometimes paired as antagonists in eighteenthcentury writings, but they were also sometimes yoked together.
At that stage, the therapeutic drama involved two pairs of contrasting metaphors, viewed as cultural antagonists.
The u s e of specific receptor antagonists (either peptides or chemical drugs) could prove to be useful for this purpose.
To investigate whether heterosynaptic or hormonal events are involved in emotional and cognitive reinforcement, we applied antagonists of receptors of different neurotransmitters and of corticosterone.
Opioid antagonists have been studied in the management of opioid-induced constipation.
Competitive antagonists of opioid receptors exert their effects inside and outside of the central nervous system.
