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Antagonist

Definition

noun, plural: antagonists

A biological structure or chemical agent that interferes with the physiological action of another


Supplement

Examples of antagonists are drugs that bind to cell receptors that prevent the agonists from eliciting a biological response. Other biological antagonists are muscles that occur in pairs. An antagonist muscle opposes the action of the agonist muscle, thus, helps in regulating movements.


Word origin: Greek antagonistes (an opponent)

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... NET inhibition can recreate an orthostatic tachycardia phenotype in susceptible healthy volunteer subjects. Yohimbine, a central alpha-2 antagonist that will also increase synaptic norepinephrine, can also cause orthostatic tachycardia. How do you test for a genetic hNET mutation? What ...

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Re:

And you sent this to the botany discussion...? :D No, the antagonist muscle does not generate equal force - if it did, muscles could not cause movement. Thus, you also need to train both the agonist and antagonist separately. The antagonist generates ...

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by mido95
Fri Dec 09, 2011 10:47 am
 
Forum: Physiology
Topic: Muscles anatomy question ?
Replies: 3
Views: 3136

Muscles anatomy question ?

And you sent this to the botany discussion...? :D No, the antagonist muscle does not generate equal force - if it did, muscles could not cause movement. Thus, you also need to train both the agonist and antagonist separately. The antagonist generates ...

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by biohazard
Fri Dec 09, 2011 7:57 am
 
Forum: Physiology
Topic: Muscles anatomy question ?
Replies: 3
Views: 3136

Muscles anatomy question ?

when you do exercises training an agonist muscle like biceps, isn't the antagonist (triceps) making a resistance power qual to the agonist force, and by this the antagonist is trained also equal to the agonist, it is said that the antagonist needs training separately, ...

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by mido95
Thu Dec 08, 2011 8:22 pm
 
Forum: Physiology
Topic: Muscles anatomy question ?
Replies: 3
Views: 3136

Competitive receptor-ligand Binding

... on them in lieu of my exam. "An agonist dose-response curve will be shifted to the right in the presence of a constant concentration of an antagonist that binds to the same receptor" Would it be safe to say the agonist's dose-respone curve wold be shifted in the presence of a constant ...

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by someguy456345
Thu Feb 24, 2011 7:48 pm
 
Forum: Cell Biology
Topic: Competitive receptor-ligand Binding
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