When bending the elbow, the
A) triceps brachii is the synergist.
B) biceps brachii is the prime mover.
C) biceps brachii is the antagonist.
D) brachialis is the prime mover.

Question

Quizplus · Accepted Answer

When bending the elbow, the biceps brachii is the prime mover. It contracts to flex the elbow joint and lift the forearm towards the shoulder. The triceps brachii, on the other hand, is the antagonist, as it relaxes to allow the biceps to contract and flex the elbow joint. The brachialis is also involved in elbow flexion but is not typically considered the prime mover in this movement.

When Bending the Elbow, the