| A | B |
|---|
| sarcomere | functional unit of muscle |
| endomysium | connective tissue surrounding the muscle fiber |
| perimysium | connective tissue surrounding the fasiculi |
| origin | muscle attachment wh/ is least "movable" |
| insertion | muscle attachment wh/ is more "movable" |
| actin | thinner of the two myofilaments |
| myosin | thicker of the two myofilaments |
| epimysium | connective tissue covering the entire muscle |
| myofibrils | threadlike protein filaments w/in a muscle fiber |
| sarcolemma | cell membrane of muscle cell |
| transverse tubules | contain extracellular fluid / pass thru muscle cell |
| sarcoplasmic reticulum | storehouse for calcium ions needed for contraction |
| motor unit | one neuron and the muscle fibers it innervates |
| motor end-plate | neuromuscular junction |
| isometric contraction | muscle fibers tighten but do not shorten |
| eccentric contraction | contraction fails / muscle lengthens |
| isokinetic contraction | contraction involves uniform resistance thru full R.o.M. |
| cardiac muscle | striated / involuntary muscle |
| smooth muscle | non-striated / involuntary muscle |
| skeletal muscle | striated / voluntary muscle tissue |
