3. Built?

4. A. Moves bones and substances ( blood, waste, nutrients)

5. A. Skeletal B. Smooth (hollow organs) C. Cardiac (heart wall only )

6. A. Skeletal (40% body mass) 1.Longest muscle fiber, multi nucleate, striations

7. B. Smooth

8. C. Cardiac

10. A. Microscopic Muscle cell or fiber

11. 1. Each muscle fiber (cell) contains 2 myofibrils, actin and myosin (elastic filaments) 6 actins to 1 myosin

12. 2. Outside of muscle cell Each compartment here is a muscle cell or muscle fiber

13. a. Myofibrils, Myosin and Actin

14. B. Parts of neuromuscular junction

16. 1. Location 2. Shape 3. Relative Size 4. Direction of Fibers 5. Number & Location of Origins 6. Action of Muscle

17. B. Four Functional roles 1.Prime mover-agonist primary movement 2.Antagonist- opposes prime mover 3.Synergist – assists prime mover 4.Fixator- holds muscle at origin

18. C. Gross Skeletal Muscle composition, Layers

19. 1. Fascia is outside Epimysium. It allows space for blood vessels and nerves and forms part of tendon. 2. Epimysium is areolar connective 3. Fascicle is surrounded by a dense connective tissue sheath of perimysuim.

20. 4. Each muscle fiber (cell) is surrounded by an reticular connective sheath of endomysium

21. D. Individual Muscles 1.Face a. SCM b. masseteur c. frontalis d. occipitalis e. temporalis d. obicularis oris & occuli e. zygomaticus Facial expression attached to skin

22. 2. neck

23. 3. Shoulder arm (front), scapula, Lats

24. 4. Abdomen

25. 5. Back

26. 6. Lower arm

27. 7. Upper leg

28. 8. Lower leg

30. E. Origins and Insertions 1.Origin is where a muscle begins, its origin. It is the less moveable end. 2.Insertion is where the muscle inserts or leads to from its origin. It is the moveable end. 3.They will be studied for major muscles. 4.They are easier to remember seeing a picture of what the muscle looks like

31. Muscle Origin Insertion Movement a.Masseter zygomatic mandibular Close mouth arch ramus b.SCM clavicle& manubrium flex neck, rotate mastoid process head c.Biceps coracoid P, radial tuberosity flex forearm capsule of shoulder joint d.Triceps glenoid cavity olecron process extend forearm pos. humerus pos. humerus radial groove e.Deltoid 1/3 clavicle, deltoid tuberosity abduction of arm acromion P of humerus scapular spine

32. Muscle Origin Insertion Movement f.Pec major clavicle, intertubercular shoulders sternum ribs groove of forward 1-6 humerus g.Trapezius occipital lat 1/3 clavicle shrug shoulders C7- T12 acromion spinous pro of scapula h.Latissimus spinous floor of chop wood P of T6-L5 intertubercular 8-12 ribs, illiac groove of crest humerus i.Rectus inferior illiac tibial tuberostiy extend knee, Femoris spine patella flex thigh

33. Muscle Origin Insertion Movement j. Biceps Ischial tuberosity lateral condyl extend thigh Femoris linea aspera of tibia flex knee distal femur head of fibula k.Gluteus dorsal ilium IT tract abduct thigh Maximus sacrum, gluteal tuberosity climb stairs coccyx of femur l.Gastroc medial & lateral calcaneal tendon plantar condyles of femur flexion