Virginia Science Content Guidelines: Bioloigy II Anatomy ...

When a muscle contracts, it causes an action at the joint(s) it crosses. When an action occurs, one bony attachment, the ... synergists. by promoting or assisting in a specific action. For example, when you flex your fingers to make a fist, the wrist extensor muscles act as synergists by preventing wrist flexion. ... antagonists, synergists ... ................
................