Muscle Action Quiz
Questions: 16 · 10 minutes
1. As someone lifts a dumbbell during the upward phase of a biceps curl, the elbow flexors shorten while producing tension. What type of contraction is this?
Concentric
Eccentric
Isometric
Passive
2. Which statement best defines flexion at a joint?
It returns a body part to the anatomical position from any movement.
It moves a body part away from the body's midline.
It turns a body part around its longitudinal axis.
It usually decreases the angle between articulating body segments.
3. During a standing calf raise, the heels lift while the forefeet remain on the floor. Which ankle action produces this movement?
Dorsiflexion
Eversion
Plantar flexion
Inversion
4. Without twisting the trunk, a person bends the torso directly toward the right side. How is this movement classified?
Right rotation
Circumduction
Trunk extension
Right lateral flexion
5. A person slowly lowers a dumbbell from the top of a biceps curl while maintaining control. What type of contraction occurs in the elbow flexors?
Eccentric contraction
Isometric contraction
Reflex contraction
Concentric contraction
6. In a typical open-chain movement, a muscle's less movable attachment is stabilized. When the muscle shortens, what usually happens to its more movable insertion?
It remains fixed while the origin moves away from it.
It moves farther away from the origin.
It rotates without changing its distance from the origin.
It moves toward the origin.
7. From a seated position with the knee bent, a person straightens the lower leg. Which muscle group is primarily associated with this knee action?
Quadriceps femoris
Ankle plantar flexors
Hamstrings
Hip adductors
8. Starting with the forearm resting palm-down, you rotate it until the palm faces upward. What is this action called?
Pronation
Opposition
Supination
Circumduction
9. The triceps brachii produces elbow extension. Relative to an intended elbow-flexion movement, what role does the triceps have?
Fixator
Prime mover
Antagonist
Synergist for flexion
10. A person rises from a bent-over position by extending the hip. Which muscle is a major contributor to that hip action?
Iliopsoas
Gluteus maximus
Tibialis anterior
Rectus abdominis
11. In movement analysis, what term describes the muscle chiefly responsible for producing the intended action?
Antagonist
Agonist, or prime mover
Fixator
Neutralizer
12. You hold a grocery bag with your elbow fixed at 90 degrees and do not let the forearm move. Which type of muscle action helps maintain this position?
Concentric contraction
Isometric contraction
Eccentric contraction
Isokinetic shortening
13. A muscle adds force to the same desired action as the prime mover. What functional role is it performing?
Antagonist
Fixator
Synergist
Prime mover
14. A person raises a straight arm out to the side until it is level with the shoulder. What action occurs at the shoulder?
Abduction
Adduction
Extension
Medial rotation
15. While keeping the heel on the floor, you pull the toes and top of the foot upward toward the shin. What action occurs at the ankle?
Plantar flexion
Dorsiflexion
Eversion
Inversion
16. When you squeeze your shoulder blades toward the spine, which scapular action occurs?
Protraction
Upward rotation
Elevation
Retraction