| A | B |
|---|
| skeletal muscles | cylindrical and multinucleated |
| insertion | end of the muscle that is attached to the movable bone |
| muscular dystrophy | muscle destroying disease |
| twitch | single, brief jerky muscle contraction |
| sarcomere | distance between 2 Z lines |
| myosin filaments | otherwise known as thick filaments |
| I band | contains only the actin filaments |
| antagonist | muscle that opposes and reverses the action of another muscle |
| fixator | muscle that stabilizes the origin of another muscle |
| aerobic respiration | uses oxygen to create 36 ATP |
| anaerobic respiration | breaks down glucose without oxygen |
| creatine phosphate | high energy molecule to convert ADP to ATP |
| acetylcholine | neurotransmitter |
| calcium ions | absorbed into the sarcoplasmic reticulum |
| inversion | to turn your foot inward |
| muscle tone | sustained partial muscle contraction |
| pronation | ex would be to lay hands flat on table |
| supination | refers to movement of ulna and radius; palm face anteriorly |
| motor unit | one neuron and all the skeletal muscle fibers it stimulates |
| actin filaments | myosin cross bridges attach to ative sites of... |
| abduction | moving away from the midline |
| adduction | moving towards the midline |
| aponeuroses | wide, sheetlike tendons |
| synaptic cleft | gap between nerve and muscle filled with interstitial fluid |
| complete tetanus | one contraction followed immediately by another;no relaxation |
| graded responses | different degrees of skeletal muscle shortening |
| ATP | needed in order for the cross bridges to be released |
| circumduction | combo of flexion, extension, abduction and adduction |
| epimysium | connective tissue covering the entire skeletal muscle |
| flexion | to decrease an angle betw 2 bones |
