In case of muscle action on a joint

A An 'antagonist' relaxes by the action of interneurons
B A 'synergist' may act on the same joint or other joints.
C A 'fixator' fixes a distal joint.
D A 'prime mover' initiates the action but do not continue all through the movement.
E No movement may be present even when a prime mover contracts.

Correct Answer: An 'antagonist' relaxes by the action of interneurons, A 'synergist' may act on the same joint or other joints., A 'fixator' fixes a distal joint.

Bissoy MCQ
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In case of muscle action at a joint
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