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8 Cards in this Set
- Front
- Back
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Muscle Fibers (cells) |
They contain contractile proteins that enable them to shorten and produce force |
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Striated muscles |
appear striped under a light microscope |
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Skeletal muscles |
connect to the body skeleton and move the animal’s limbs and torso. They are under VOLUNTARY or conscious control |
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Cardiac muscles |
contract to pump blood and are INVOLUNTARY muscles |
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Smooth muscles |
appear uniform (no striations) under a light microscope. They are INVOLUNARY muscles that control blood in the walls of arteries, control airflow in the respiratory system, and move food through in the digestive system |
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Myofibrils |
rod like structures that contain parallel arrays of the actin and myosin filaments that cause a muscle to contract |
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Z discs |
protein backbones regularly spaced along the length of the myofibril |
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Sarcomere |
region from one Z disc to the next, basic contractile unit of the cell. lengthen or shorten in response to actin-myosin interactions |
