1. TYPES OF MUSCLES
   1. smooth muscle (blood vessel/organs)
   2. cardiac muscle (heart)
   3. skeletal muscle (muscle for movement)
2. MUSCLE FIBER - THE MUSCLE CELL
   1. nearly invisible to the naked eye
   2. sarcoplasm contains high glucose and myoglobin
   3. surrounded by the plasma membrane (sarcolemma)
   4. t-tubules are extensive network that runs laterally through the muscle fiber
   5. sarcoplasmic reticulum are extensive network thar runs longitudinally
3. THE STRUCTURE AND FUNCTION OF SKELETAL MUSCLE
   1. the muscle fiber
   2. the myofibril
   3. fiber muscle action
4. SLIDING FILAMENT THEORY
   1. Impulse arrives at neuromuscular junction
      1. * Ca2+ released from sarcoplasmic reticulum
      2. * Ca2+ attach to troponin, causing it to move
      3. * Tropomyosin moves
      4. * Myosin binding sites are exposed
   2. Attachment
      1. * Myosin heads bind to Actin
      2. * Forming cross-bridges
      3. * ADP, Pi are released from Myosin head
   3. Power stroke
      1. * Myosin heads nod forward
      2. * Pulling Actin filament over Myosin
   4. Detachment
      1. * ATP binds to Myosin head
      2. * Cross bridge 'breaks'
      3. * Myosin detaches from Actin
   5. Energy released
      1. * ATP is broken down to ADP, Pi
      2. * By ATPase on Myosin heads
      3. * Head returns to upright position
   6. ATP is used to actively transport Ca2+ back to sarcoplasmic reticulum
5. USE OF MUSCLES
6. REQUIREMENTS FOR LARGE MUSCLE DEVELOPMENT
   1. proper nutrition
   2. resistance training
   3. genetics
   4. hormonal secretion levels
      1. * testosterone
      2. * androgens
7. CLASSES OF MUSCLE
   1. agonists (prime mover)
   2. antagonists (opposer)
   3. synergists (assistant)
   4. arm flexion
      1. * biceps & triceps brachii
      2. * brachialis
8. GENERATION OF FORCE
   1. number of motor unit
   2. types of motor unit
   3. size of the muscle
   4. angle of joint
   5. stretch reflex
9. TYPES OF MUSCLES FIBER
10. Slow twitch
    1. aerobic
    2. continuous energy
    3. fires slowly
    4. extend muscle contraction
    5. marathoners
11. Types of contraction
    1. * concentric
    2. * static
    3. * eccentric
12. Types of movement
    1. * agonist
    2. * antagonist
    3. * synergists
13. Fast twitch
    1. anaerobic
    2. shor burst of speed
    3. fires rapidly
    4. fatigue quickly
    5. sprinters