What type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts?

Question

BlackTom AI · Accepted Answer

The question asks to identify the muscle type that assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts.
Option 1: 'an antagonist' — Antagonists oppose the action of the agonist, providing braking or reverse movement rather than assisting or stabilizing in the same direction. This makes this option inconsistent with the described role.
Option 2: 'a prime mover' — The prime mover, or agonist, is the muscle primarily responsible for a movement. Since the question specifies assistance to the agonist, this option describes the main worker rather than the helper, so it does not fit.
Option 3: 'an agonist' — The agonist is the muscle performing the primary action. The scenario specifies assistance to that action, not the main action itself, so this choice is not correct.
Option 4: 'a synergist' — A synergist is a muscle that helps the agonist by contributing to the same movement or by stabilizing the joint around which the agonist acts. This matches the described role precisely, providing either additional force in the same direction or joint stabilization as needed.
In summary, the option that aligns with assisting the agonist by adding to the movement or by stabilizing the joint is the synergist, which explains why this choice is the appropriate one for the given description.

What type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts?

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