| A | B |
|---|
| atrophy | the shrinkage in size of the muscle fiber from lack of use |
| cartilage | found in a joint between bones and acts like a cushion between the ends of a bone. |
| concentric contraction | shortening; one end of a muscle remains stationary while the other end pulls the bone and turns the joint. |
| eccentric contraction | lengthening;muscle contracts and slowly returns to its original length |
| fast-twitch muscle fiber | best suited for fast, short term contractions; ex. muscles used for weight lifting. |
| hypertrophy | enlargement in the diameter of the muscle fiber. |
| intermediate fast-twitch muscle fiber | type of muscle fiber used in activities of high intensity and moderate duration; ex. middle distance running |
| ligament | connects bones together in a joint |
| muscle | bands of fiber which enable the body to move |
| muscle endurance | the ability of a muscle group to continue muscular movement over a length of time. |
| muscle strength | the amount of force that can be exerted by a single contraction of the muscle. |
| slow-twitch muscle fiber | slow to contract but have the ability to continue working for long periods of time; ex. muscles used for long distance running |
| static contraction | muscle contraction in which the muscle remains in partial or complete contraction without changing its length |
| tendon | attaches skeletal muscles to bone. |
| testosterone | a hormone that is necessary for development of large muscles |
