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Muscular Vocab #3
| Term | Definition |
|---|---|
| Twitch | Single contraction of a muscle fiber followed by relaxation |
| Latent Period | Time between application of a stimulus and the beginning of a response in a muscle fiber |
| Summation | Increased force of contraction by a skeletal muscle fiber when a twitch occurs before the previous twitch relaxes |
| Complete Tetanic Contraction | When the frequency of contraction is so rapid that the fiber doesn’t relax at all; tetanus |
| Motor Unit | A motor neuron and the muscle fibers that it controls |
| Recruitment | Increase in the number of motor units taking part in a muscle contraction |
| Muscle Tone | Ongoing low-level contraction of some fibers in otherwise resting skeletal muscle |
| Peristalsis | Rhythmic waves of muscular contraction in the walls of certain tubular organs |
| Intercalated Disks | Connection between cardiac muscle cells |
| Origin | End of a muscle that attaches to a relatively immovable part |
| Insertion | End of a muscle attached to a movable part |
| Agonist | A muscle that causes a particular movement |
| Antagonist | Muscle that opposes a particular movement |
| Prime Mover | Muscle that provides most of a particular body movement, also called an agonist |
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Malia.grace08
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