Search results
Results From The WOW.Com Content Network
An antagonist is used as a plot device, to set up conflicts, obstacles, or challenges for the protagonist. [5] [7] Though not every story requires an antagonist, it often is used in plays to increase the level of drama. In tragedies, antagonists are often the cause of the protagonist's main problem, or lead a group of characters against the ...
Receptor antagonist. Antagonists will block the binding of an agonist at a receptor molecule, inhibiting the signal produced by a receptor–agonist coupling. A receptor antagonist is a type of receptor ligand or drug that blocks or dampens a biological response by binding to and blocking a receptor rather than activating it like an agonist.
An adrenergic antagonist is a drug that inhibits the function of adrenergic receptors. There are five adrenergic receptors, which are divided into two groups. The first group of receptors are the beta (β) adrenergic receptors. There are β 1, β 2, and β 3 receptors. The second group contains the alpha (α) adrenoreceptors.
NMDA receptor antagonists are a class of drugs that work to antagonize, or inhibit the action of, the N -Methyl- D -aspartate receptor ( NMDAR ). They are commonly used as anesthetics for humans and animals; the state of anesthesia they induce is referred to as dissociative anesthesia. Several synthetic opioids function additionally as NMDAR ...
A dopamine antagonist, also known as an anti-dopaminergic and a dopamine receptor antagonist ( DRA ), is a type of drug which blocks dopamine receptors by receptor antagonism. Most antipsychotics are dopamine antagonists, and as such they have found use in treating schizophrenia, bipolar disorder, and stimulant psychosis. [1]
An antagonist is a compound that has the opposite effect of an agonist. It decreases the activation of a synaptic receptor by binding and blocking neurotransmitters from binding or by decreasing the amount of time neurotransmitters are in the synaptic cleft. These actions can be achieved via multiple mechanisms.
1. receptor antagonist. Neurokinin 1 (NK1) antagonists (-pitants) are a novel class of medications that possesses unique antidepressant, [1] [2] anxiolytic, [3] and antiemetic properties. NK-1 antagonists boost the efficacy of 5-HT3 antagonists to prevent nausea and vomiting. The discovery of neurokinin 1 ( NK 1) receptor antagonists was a ...
Antagonism (chemistry), where the involvement of multiple agents reduces their overall effect. Drug antagonism, a drug that stops the action or effect of another substance, preventing a biological response. Receptor antagonism or pharmacological antagonism, the action of a drug that inhibits the function of an agonist at the level of a receptor.