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Chapter 7
Muscular System
| Question | Answer |
|---|---|
| Antagonist | a muscle whose contraction opposes an action of another muscle |
| Aponeurosis | a broad sheet of fibrous connective tissue that attaches a muscle to another muscle or connective tissue |
| Creatine phosphate | a molecule that stores a small amount of energy in a muscle fiber |
| Insertion | the attachment of a muscle that moves when the muscle contracts |
| Motor Unit | a motor neuron and the muscle fibers that it controls |
| Muscle Tone | the state of slight contraction in a skeletal muscle |
| Myofibril | one of many contractile fibers within a muscle cell |
| Myoglobin | a molecule that stores a small amount of oxygen in a muscle fiber |
| Neurotransmitter | a chemical released by axon tips of neurons that activates a muscle fiber, gland, or another neuron |
| Origin | the attachment of a muscle that remains fixed when the muscle contracts |
| Sarcomere | the smallest contractile unit of a myofibril |
| Tendon | a narrow band of fibrous connective tissue that attaches a muscle to a bone |
| Tetanic Contraction | a sustained muscle contraction |
| Muscle Fiber | a single muscle cell |
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