Multiple choice When raising a spoon to your mouth, your elbow bends when __________? Contraction of the triceps Relaxation of the biceps Contraction of the biceps Relaxation of the triceps Reveal answer Fill a bubble to check yourself C Correct answer Explanation Bending the elbow (flexion) to raise a spoon is primarily caused by the contraction of the biceps muscle, which acts as the agonist. Simultaneously, the triceps muscle relaxes to allow this movement to occur.