Biceps- flexes
Triceps- extends
As muscles can only pull, you have to have sets of muscles that pull in the opposite directions; these are called antagonistic pairs.
Is defined as the decrease in angle between two bones.
Is defined as the increase in angle between two bones.
The muscle sets below are antagonist pairs.
Brings the forearm towards the humerus.
Takes the forearm away form the humerus.
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