1. Bell Ringer
________ is the name for the plasma membrane of a muscle cell.
2. ________ is the membrane that wraps the fascicle.
3. Thick filaments are composed of which protein:
a. actin b. myosin

2. _______ is the contractile unit of the muscle fiber.
5. Place these structures of the skeletal muscle in order from largest to smallest:
Fascicle b. myofilament c. muscle fiber
d. myofibril e.sarcomere

3. Five Golden Rules of Skeletal Muscle Activity
Table 6.2

4. Muscles and Body Movements
Movement is attained due to a muscle moving an attached bone
Muscles are attached to at least two points
Origin
Attachment to a moveable bone
Insertion
Attachment to an immovable bone

5. Types of Muscles
Prime mover—muscle with the major responsibility for a certain movement
Antagonist—muscle that opposes or reverses a prime mover
Synergist—muscle that aids a prime mover in a movement and helps prevent rotation
Fixator—stabilizes the origin of a prime mover

6. Muscles and Body Movements
Figure 6.12

10. Types of Ordinary Body Movements
Figure 6.13a

11. Figure 6.13b

12. Figure 6.13c

13. Figure 6.13d

14. Special Movements
Figure 6.13e

15. Figure 6.13f

16. Figure 6.13g

17. Figure 6.13h

18. Naming Skeletal Muscles
By direction of muscle fibers
Example: Rectus (straight)
By relative size of the muscle
Example: Maximus (largest)
By location of the muscle
Example: Temporalis (temporal bone)
By number of origins
Example: Triceps (three heads)

19. Naming Skeletal Muscles
By location of the muscle’s origin and insertion
Example: Sterno (on the sternum)
By shape of the muscle
Example: Deltoid (triangular)
By action of the muscle
Example: Flexor and extensor (flexes or extends a bone)

20. Arrangement of Fascicles
Figure 6.14

21. Deltoid—arm abduction
Sternocleidomastoid—flexes the neck, rotates the head
Supraspinatus-abducts the arm, stabilizes the shoulder*
Subscapularis-extends the arm and rotates the arm, stabilizes the shoulder*
Teres minor-extends, rotates, and adducts the arm, stabilizes the shoulder*
Infraspinatus-extends and rotates the arm, stabilizes the shoulder*
*These muscles make up the rotator cuff

22. Pectoralis major—adducts and flexes the humerus
Intercostal muscles-raise and depress rib cage during respiration
Rhomboideus major-adducts the scapula
Rhomboideus minor-adducts the scapula
Latissimus Dorsi-extends and adducts the humerus
Trapezius—elevates, depresses, adducts, and stabilizes the scapula

23. Figure 6.17a

24. Anterior Muscles of Trunk, Shoulder, Arm
Figure 6.16a

25. Muscles of Trunk, Shoulder, Arm
Muscles of the abdominal girdle
Rectus abdominis—flexes vertebral column and compresses abdominal contents (defecation, childbirth, forced breathing)
External and internal obliques—flex vertebral column; rotate trunk and bend it laterally
Transversus abdominis—compresses abdominal contents

26. Anterior Muscles of Trunk, Shoulder, Arm
Figure 6.16b

27. Muscles of Posterior Neck, Trunk, Arm
Figure 6.17b

28. Muscles of the Upper Limb
Biceps brachii—supinates forearm, flexes elbow
Brachialis—elbow flexion
Brachioradialis—weak muscle
Triceps brachii—elbow extension (antagonist to biceps brachii)

29. Anterior Muscles of Trunk, Shoulder, Arm
Figure 6.16a

30. Muscles of Posterior Neck, Trunk, Arm
Figure 6.17a

31. Muscles of the Lower Limb
Gluteus maximus—hip extension
Gluteus medius—hip abduction, steadies pelvis when walking
Iliopsoas—hip flexion, keeps the upper body from falling backward when standing erect
Adductor muscles—adduct the thighs

32. Muscles of the Pelvis, Hip, Thigh
Figure 6.19a

33. Muscles of the Pelvis, Hip, Thigh
Figure 6.19c

34. Muscles of the Lower Limb
Muscles causing movement at the knee joint
Hamstring group—thigh extension and knee flexion
Biceps femoris
Semimembranosus
Semitendinosus

35. Muscles of the Pelvis, Hip, Thigh
Figure 6.19a

36. Muscles of the Lower Limb
Muscles causing movement at the knee joint
Sartorius—flexes the thigh
Quadriceps group—extends the knee
Rectus femoris
Vastus muscles (three)

37. Muscles of the Pelvis, Hip, Thigh
Figure 6.19c

38. Muscles of the Lower Limb
Muscles causing movement at ankle and foot
Tibialis anterior—dorsiflexion and foot inversion
Extensor digitorum longus—toe extension and dorsiflexion of the foot
Fibularis muscles—plantar flexion, everts the foot
Soleus—plantar flexion

39. Muscles of the Lower Leg
Figure 6.20a

40. Muscles of the Lower Leg
Figure 6.20b

41. Superficial Muscles: Anterior
Figure 6.21

42. Superficial Muscles: Posterior
Figure 6.22

43. Superficial Anterior Muscles of the Body
Table 6.3 (1 of 3)

44. Superficial Anterior Muscles of the Body
Table 6.3 (2 of 3)

45. Superficial Anterior Muscles of the Body
Table 6.3 (3 of 3)

46. Superficial Posterior Muscles of the Body
Table 6.4 (1 of 3)

47. Superficial Posterior Muscles of the Body
Table 6.4 (2 of 3)

48. Superficial Posterior Muscles of the Body
Table 6.4 (3 of 3)

49. Intramuscular Injection Sites
Figure 6.18, 6.19b, d