3 questions

Kinesiology

A muscle that opposes and relaxes to allow the action of the prime mover is called the:

  • a.Antagonist
  • b.Agonist
  • c.Synergist
  • d.Fixator

The antagonist opposes the movement of the prime mover (agonist) and lengthens as the agonist shortens. For example, when the biceps flexes the elbow, the triceps acts as the antagonist.

Kinesiology

Which muscle is a primary flexor of the elbow?

  • a.Triceps brachii
  • b.Biceps brachii
  • c.Deltoid
  • d.Latissimus dorsi

The biceps brachii flexes the elbow and also supinates the forearm. The triceps brachii is the primary elbow extensor and acts as the antagonist during elbow flexion.

Kinesiology

Movement of a limb away from the midline of the body is termed:

  • a.Adduction
  • b.Flexion
  • c.Rotation
  • d.Abduction

Abduction moves a body part away from the midline (for example, raising the arm out to the side). Adduction is the opposite movement, bringing the limb back toward the midline.

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