what type of movement does the muscles in the biceps have
The origins of both the triceps and the biceps are at the top of the humerus near the shoulder joint. As the bicep contracts, the lower arm (radius and ulna) moves up towards the shoulder. The triceps relax to allow this movement to happen. The bicep is the prime mover or agonist, while the tricep is the secondary mover or antagonist. Muscles are attached to bones at either side of the joints by tendons.