chapter11

Question 1

1. Which structure acts as the fulcrum in the musculoskeletal lever system?
   A. Muscle
   B. Bone
   C. Joint
   D. Tendon

Answer 1

Answer: C
The joint is the pivot point where movement occurs.

Question 2

2. In a third-class lever, the applied force is located:
   A. Between the fulcrum and load
   B. At the fulcrum
   C. At the load
   D. Outside the system

Answer 2

Answer: A
Third-class levers place force between fulcrum and load.

Question 3

3. Which lever type is most common in the human body?
   A. First-class
   B. Second-class
   C. Third-class
   D. None

Answer 3

Answer: C
Most body movements prioritize speed and range

Question 4

4. Which lever class provides the greatest mechanical advantage for lifting heavy loads?
   A. First-class
   B. Second-class
   C. Third-class
   D. All equal

Answer 4

Answer: B
Second-class levers maximize force output.

Question 5

5. The fixed attachment point of a muscle is called the:
   A. Insertion
   B. Origin
   C. Tendon
   D. Belly

Answer 5

Answer: B
The origin remains stationary during contraction.

Question 6

6. The movable attachment point of a muscle is called the:
   A. Origin
   B. Ligament
   C. Insertion
   D. Fascia

Answer 6

Answer: C
The insertion moves toward the origin during contraction.

Question 7

7. Which muscle role is primarily responsible for producing a specific movement?
   A. Antagonist
   B. Synergist
   C. Fixator
   D. Agonist

Answer 7

Answer: D
The agonist is the prime mover.

Question 8

8. A muscle that opposes the action of the agonist is called a(n):
   A. Fixator
   B. Antagonist
   C. Synergist
   D. Stabilizer

Answer 8

Answer: B
Antagonists produce opposite movements.

Question 9

9. Which muscle assists the agonist in performing a movement?
   A. Antagonist
   B. Synergist
   C. Fixator
   D. Prime mover

Answer 9

Answer: B
Synergists help the main muscle perform the action.

Question 10

10. A fixator functions to:
    A. Create movement
    B. Oppose movement
    C. Stabilize a joint
    D. Lengthen muscle

Answer 10

Answer: C
Fixators prevent unwanted movement.

Question 11

11. Muscles with fibers running parallel to the long axis of the muscle are classified as:
    A. Pennate
    B. Circular
    C. Parallel
    D. Convergent

Answer 11

Answer: C
Parallel muscles allow greater range of motion.

Question 12

12. Which fascicle arrangement produces the greatest force?
    A. Parallel
    B. Circular
    C. Convergent
    D. Pennate

Answer 12

Answer: D
Pennate muscles pack more fibers, increasing strength.

Question 13

13. Circular muscles are primarily responsible for:
    A. Producing large force
    B. Moving limbs
    C. Closing openings
    D. Stabilizing joints

Answer 13

Answer: C
They act as sphincters around openings.

Question 14

14. Muscles that have fibers converging to a single attachment point are called:
    A. Parallel
    B. Circular
    C. Convergent
    D. Pennate

Answer 14

Answer: C
They allow pulling in multiple directions.

Question 15

15. Muscles located along the central axis of the body are classified as:
    A. Appendicular
    B. Axial
    C. Peripheral
    D. Superficial

Answer 15

Answer: B
Axial muscles support the head, neck, and trunk.

Question 16

16. Muscles that move the limbs are classified as:
    A. Axial
    B. Appendicular
    C. Core
    D. Intrinsic

Answer 16

Answer: B
Appendicular muscles control limb movement.

Question 17

17. A muscle crossing the anterior side of a joint typically causes:
    A. Extension
    B. Rotation
    C. Flexion
    D. Abduction

Answer 17

Answer: C
Anterior muscles usually produce flexion.

Question 18

18. A muscle crossing the posterior side of a joint typically causes:
    A. Flexion
    B. Extension
    C. Adduction
    D. Rotation

Answer 18

Answer: B
Posterior muscles usually produce extension.

Question 19

19. The term “biceps” indicates:
    A. Muscle location
    B. Muscle action
    C. Number of heads
    D. Muscle shape

Answer 19

Answer: C
“Bi” means two heads.

Question 20

20. The term “orbicularis” describes a muscle’s:
    A. Function
    B. Shape
    C. Size
    D. Location

Answer 20

Answer: B
Orbicularis means circular shape.

Question 21

1. Muscles that surround and control openings (like the mouth) are classified as:
   A. Parallel
   B. Convergent
   C. Pennate
   D. Circular

Answer 21

Answer: D
Circular muscles act as sphincters to open and close body openings.

Question 22

2. Which fascicle arrangement produces the greatest force?
   A. Parallel
   B. Circular
   C. Convergent
   D. Pennate

Answer 22

Answer: D
Pennate muscles have more fibers packed in, making them stronger.

Question 23

3. Which type of muscle allows the greatest range of motion?
   A. Pennate
   B. Circular
   C. Parallel
   D. Convergent

Answer 23

Answer: C
Parallel muscles shorten more, allowing larger movement.

Question 24

4. The most common lever system in the human body is:
   A. First-class
   B. Second-class
   C. Third-class
   D. Fourth-class

Answer 24

Answer: C
Third-class levers are used most for speed and movement.

Question 25

5. Standing on your toes is an example of which lever? A. First-class B. Second-class C. Third-class D. No lever

Answer 25

Answer: B Second-class levers place the load in the middle and increase strength.

Question 26

6. In the body, what structure acts as the fulcrum? A. Muscle B. Bone C. Joint D. Tendon

Answer 26

Answer: C The joint is the pivot point of movement.

Question 27

7. The attachment point that moves during muscle contraction is the: A. Origin B. Insertion C. Belly D. Fascia

Answer 27

Answer: B Insertion is the movable attachment pulled toward the origin.

Question 28

8. A muscle primarily responsible for producing a movement is called a: A. Antagonist B. Synergist C. Agonist D. Fixator

Answer 28

Answer: C The agonist is the main muscle doing the action.

Question 29

9. A muscle that opposes the action of another muscle is a: A. Synergist B. Fixator C. Agonist D. Antagonist

Answer 29

Answer: D Antagonists produce opposite movements

Question 30

10. A muscle that assists the agonist is called a: A. Antagonist B. Synergist C. Fixator D. Extensor

Answer 30

Answer: B Synergists help the main muscle perform the movement.

Question 31

11. Muscles crossing the anterior side of a joint usually cause: A. Extension B. Flexion C. Rotation D. Abduction

Answer 31

Answer: B Anterior muscles typically produce flexion.

Question 32

12. Muscles crossing the posterior side of a joint usually cause: A. Flexion B. Adduction C. Extension D. Rotation

Answer 32

Answer: C Posterior muscles typically produce extension.

Question 33

13. Which term describes a muscle with fibers running straight along the body? A. Oblique B. Transverse C. Rectus D. Medialis

Answer 33

Answer: C Rectus means straight alignment with the body axis.

Question 34

14. Which term refers to a muscle that runs at an angle? A. Rectus B. Transversus C. Oblique D. Lateralis

Answer 34

Answer: C Oblique muscles run diagonally.

Question 35

15. The term “biceps” refers to: A. Muscle shape B. Muscle location C. Number of heads D. Muscle action

Answer 35

Answer: C “Bi” means two heads.

Question 36

16. Muscles found along the center of the body are classified as: A. Appendicular B. Axial C. Peripheral D. Intrinsic

Answer 36

Answer: B Axial muscles are in the head, neck, and trunk.

Question 37

17. Muscles that move the limbs are called: A. Axial B. Core C. Appendicular D. Superficial

Answer 37

Answer: C Appendicular muscles control limb movement.

Question 38

18. The muscle responsible for closing the mouth (kissing motion) is: A. Buccinator B. Orbicularis oris C. Masseter D. Temporalis

Answer 38

Answer: B Orbicularis oris closes and purses the lips.

Question 39

19. The strongest muscle used for chewing is the: A. Temporalis B. Buccinator C. Masseter D. Digastric

Answer 39

Answer: C Masseter is the primary powerful chewing muscle.

Question 40

20. Bones in the body act as levers to: A. Only move the body B. Only increase force C. Change speed, distance, and force D. Prevent movement

Answer 40

Answer: C Levers affect speed, distance, and strength of movement.

Question 41

1. Which muscles make up the rotator cuff? A. Deltoid, trapezius, latissimus dorsi, teres major B. Supraspinatus, infraspinatus, teres minor, subscapularis C. Biceps brachii, triceps brachii, brachialis, brachioradialis D. Pectoralis major, serratus anterior, rhomboid, levator scapulae

Answer 41

Answer: B These four muscles stabilize the shoulder joint.

Question 42

2. Which muscle is the strongest muscle of mastication? A. Temporalis B. Masseter C. Buccinator D. Digastric

Answer 42

Answer: B Masseter produces the strongest chewing force.

Question 43

3. What is the primary function of the buccinator muscle? A. Close the eyes B. Move food between teeth C. Elevate the jaw D. Rotate the head

Answer 43

Answer: B It keeps food in place during chewing.

Question 44

4. The orbicularis oris muscle is responsible for: A. Opening the jaw B. Closing the eyes C. Pursing the lips D. Moving the tongue

Answer 44

Answer: C It closes and puckers the lips.

Question 45

5. Which muscle allows you to look upward? A. Inferior rectus B. Superior rectus C. Lateral rectus D. Medial rectus

Answer 45

Answer: B Superior rectus elevates the eye.

Question 46

8. Which lever type is most common in the human body? A. First-class B. Second-class C. Third-class D. Fourth-class

Answer 46

Answer: C Third-class levers allow fast movement.

Question 46

6. Which muscle allows you to look downward? A. Superior rectus B. Medial rectus C. Inferior rectus D. Lateral rectus

Answer 46

Answer: C Inferior rectus lowers the eye

Question 47

7. Eye muscles are primarily composed of: A. Slow-twitch fibers B. Fast-twitch fibers C. Smooth muscle D. Cardiac muscle

Answer 47

Answer: B They need to move quickly and precisely.

Question 48

9. Which of the following is an example of a first-class lever? A. Biceps curl B. Standing on toes C. Nodding the head D. Jumping

Answer 48

Answer: C Fulcrum is between force and load (neck movement).

Question 49

10. Standing on your toes is an example of a: A. First-class lever B. Second-class lever C. Third-class lever D. No lever

Answer 49

Answer: B Load is between fulcrum and force.

Question 50

11. A biceps curl is an example of a: A. First-class lever B. Second-class lever C. Third-class lever D. Fourth-class lever

Answer 50

Answer: C Force is between fulcrum and load.

Question 51

12. The origin of a muscle is defined as: A. The movable attachment B. The fixed attachment C. The middle portion D. The tendon

Answer 51

Answer: B Origin stays stationary during contraction.

Question 52

13. The insertion of a muscle is: A. The fixed attachment B. The joint C. The movable attachment D. The fascia

Answer 52

Answer: C Insertion moves toward the origin.

Question 53

14. A muscle that produces the main movement is called a: A. Antagonist B. Synergist C. Fixator D. Agonist

Answer 53

Answer: D Agonist is the prime mover.

Question 54

15. Where does the pectoralis major insert and what does it do? A. Scapula; abducts arm B. Greater tubercle of humerus; flexes, adducts, rotates arm C. Radius; flexes forearm D. Sternum; extends arm

Answer 54

Answer: B It moves the arm forward, inward, and rotates it.