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30 Cards in this Set
- Front
- Back
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Fused tetanus |
No evidence of relaxation before contractions |
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Basic muscle types |
Skeletal, cardiac, smooth |
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Connective tissue wrappings |
Cells are surrounded and bundled by connective tissue |
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Endomysium |
Encloses a single muscle fiber |
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Perimysium |
Wraps around a fascicle of muscle fibers |
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Epimysium |
Covers entire skeletal muscle |
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Fascia |
Located on the outside of the skeletal muscle |
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Tendons |
Cord-like structures |
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Aponeurosis |
Sheet-like structures |
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I band |
Light band, contains only thick filaments |
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A band |
Dark band, contains the entire length of the thick filaments |
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Tetanus |
Summing of contractions |
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Twitch |
Single, brief contraction |
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Unfused tetanus |
Some relaxation occurs between contractions |
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Atp |
Stored by muscles |
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Contraction |
Muscle response to stimuli |
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Muscle force |
Depends on the number of fibers stimulated |
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Multinucleated |
Multiple nucleus |
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Striated |
Visible banding |
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Voluntary |
Subject to conscious control |
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Reason for muscle contractions |
Movement of microfilaments |
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Characteristic of smooth and skeletal muscles |
Elongated |
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Skeltal muscle function |
Produce movement, maintain posture, stabilize joints, generate heat |
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Synaptic cleft |
Area between nerves and muscles |
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Neurotransmitter |
Chemical released by nerve upon arrival of nerve impulse |
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Acetylocholine |
Skeletal muscles neurotransmitter |
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Sarcolemma |
Permeable to sodium |
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Graded responses |
Different degrees of skeletal muscles shortening |
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Atp bonds |
Broken to release energy |
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Muscles contract until.. |
They run out of energy |
