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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 |