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Cards In This Set
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What are the three types of muscle tissue? Give a brief description of each.
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-Skeletal: forms the large muscles responsible for gross body movements-Cardiac: found only in the heart and responsible for the circulation of blood-Smooth: found in the walls of visceral organs and a variety of other locations, where it provides elasticity, contractility and support
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a. Epithelia cover surfaces and line passageways; connective tissue ____ and ____ parts of the body.
b. Together these tissues provide....? |
a. support and interconnect
b. provide a strong, interwoven framework within which the organs of the body can function (several vital functions involve movement) |
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What are muscle tissues and what are they responsible?
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-Tissues specialized for contraction.-They are responsible for movement. (***Movement is produced by these types of cells)
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Describe the physical features of skeletal muscles tissue/cell?
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-very large cells-long-slender-cylindrical-striated: actin and myosin filaments are organized into repeating groups that give the cells a striated appearance-multinucleate: each muscle fiber has several hundred nuclei distributed just inside the plasma membrane
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What is another name for skeletal muscle tissue? And why do they have this alternate name?
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-Alternate name is muscle fibbers (because the individual skeletal muscle cells are long and slender )
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How do skeletal muscle tissue or muscle fibers reproduce?
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-New muscle fibers are produced through the division of myosatellite cells (satellite cells); stem cells that persist in adult skeletal muscle tissue
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Determine if skeletal, cardiac and smooth muscle tissues are striated, non-striated, voluntary or involuntary.
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-Skeletal: striated voluntary muscle***voluntary - muscle does not contract unless stimulated by nerves, and the nervous system provides voluntary control over their activities
-Cardiac: striated involuntary muscle-Smooth: non-striated involuntary muscle |
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What are the locations of skeletal muscle tissue?
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--Combined with connective tissues and neural tissue in skeletal muscles
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What are the functions of skeletal muscle tissue?
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-Moves or stabilizes the position of the skeleton-Guards entrances and exits to the digestive, respiratory, and urinary tracts-Generates heat-Protects internal organs
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Describe the physical features of cardiac muscles tissue/cell?
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-short-branched (as a result of extensive connections with one another)-striated-usually with one nucleus-cells are interconnected by intercalated discs
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What are the locations of cardiac muscle tissue?
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-Heart only
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What are the functions of cardiac muscle tissue?
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-Circulates blood-Maintains blood(hydrostatic) pressure
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Describe the physical features of smooth muscles tissue/cell?
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-short-spindle-shaped (with tapering ends)-non-striated-single central (oval) nucleus
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What are the locations of smooth muscle tissue?
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-Found in the walls of blood vessels and in digestive, respiratory, urinary and reproductive organs
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What are the functions of smooth muscle tissue?
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-Moves food, urine and reproductive tract secretions-Controls diameter of reparatory passageways-Regulates diameter of blood vessels
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