| A | B |
|---|
| Sarcoplasm | the hyaline of finely granular interfibrillar material of muscle tissue |
| action potential | the electric change occuriing across the membrane of a nerve of muscle cell during transmission of a nerve impulse |
| antagonist | a muscle whose action opposes the action of another muscle |
| belly | the central part of a muscle |
| contractibility | the ability to shorten and reduce the distance between the parts |
| elasticity | capable of returning to original form after being compressed or stretched |
| excitability | ability to respond to stimuli |
| extensibility | the ability to lengthen (stretch) and increase the angle between two bones |
| irritability | ability to react to a stimulus |
| isometric | tension in nuscle increases but muscle does not shorten |
| isotonic | muscle contracts and shortens |
| insertion | part of a muscle that is attached to a movable part |
| origin | part of the skeletal muscle that is attached to the fixed part of the bone |
| prime mover | muscle that provides movement in a single direction |
| sarcolemma | muscle cell membrane |
| synergist | muscles that help steady a joint |
