Term
|
Definition
| excitability, contractility, elasticity, and extensibility |
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|
Term
|
Definition
| responds to stimuli from neurons |
|
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Term
|
Definition
|
|
Term
|
Definition
| can recoil after contraction |
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Term
|
Definition
| capable of stretching during flexion of antagonist muscles |
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|
Term
| Functions of Muscle Tissue |
|
Definition
| movement, maintenance of posture, temperature regulation, storage and movement of materials (calcium), support abdominal organs, and joint stabilization |
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|
Term
| Three types of muscle tissue: |
|
Definition
| cardiac muscle, smooth muscle, and skeletal muscle |
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Term
| Characteristics of Cardiac Muscle |
|
Definition
* found in myocardium of heart
* fibers are 'y' shaped/branched
* uninucleated
* striated
* involuntary
* intercalated discs
* auto-rhythmic |
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Term
| Characteristics of Smooth Muscle |
|
Definition
* found in the walls of visceral organs
* fusiform shape (wide middle and tapered at each end)
* uninucleated
* no striations
* involuntary
* fatigue resistant |
|
|
Term
|
Definition
| excitability, contractility, elasticity, and extensibility |
|
|
Term
|
Definition
| responds to stimuli from neurons |
|
|
Term
|
Definition
|
|
Term
|
Definition
| can recoil after contraction |
|
|
Term
|
Definition
| capable of stretching during flexion of antagonist muscles |
|
|
Term
| Functions of Muscle Tissue |
|
Definition
| movement, maintenance of posture, temperature regulation, storage and movement of materials (calcium), support abdominal organs, and joint stabilization |
|
|
Term
| Three types of muscle tissue: |
|
Definition
| cardiac muscle, smooth muscle, and skeletal muscle |
|
|
Term
| Characteristics of Cardiac Muscle |
|
Definition
* found in myocardium of heart
* fibers are 'y' shaped/branched
* uninucleated
* striated
* involuntary
* intercalated discs
* auto-rhythmic |
|
|
Term
| Characteristics of Smooth Muscle |
|
Definition
* found in the walls of visceral organs
* fusiform shape (wide middle and tapered at each end)
* uninucleated
* no striations
* involuntary
* fatigue resistant |
|
|
Term
| Characteristics of Skeletal Muscle |
|
Definition
* made of cylindrical muscle cells (myofibers)
* multinucleate (formed from fused myoblasts)
* striated
* voluntary
* contains myoglobin (oxygen binding pigment)
* innervated (neuromuscular junctions)
* vascular |
|
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Term
|
Definition
| surrounds each muscle fiber; areolar and reticular fibers |
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Term
|
Definition
| surrounds groups of muscle fibers (fascicles); dense irregular CT |
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|
Term
|
Definition
| surrounds whole muscle; dense irregular CT |
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Term
|
Definition
| surrounds muscle groups (what we see); dense irregular CT |
|
|
Term
|
Definition
| Attach muscle to bones, skin, cartilage |
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Term
|
Definition
| O = less movable attachment of muscle; I = more movable attachment (insertion moves toward the origin) |
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Term
|
Definition
| Cell membrane of myofiber |
|
|
Term
|
Definition
| cytoplasm of muscle fiber |
|
|
Term
| Transverse Tubules (T-tubules) |
|
Definition
| invaginations of sarcolemma; conduct impulses to deepest regions of cell |
|
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Term
|
Definition
elaborate smooth ER that is storage site of calcium
* surrounds each myofibril; stores calcium; contain terminal cisternae (site of calcium releaase) |
|
|
Term
|
Definition
* found inside of muscle fibers
* shorten during muscle contraction
* long row of repeating segments (sarcomeres)
* composed of myofilaments |
|
|
Term
|
Definition
| Function unit of myofiber; z-disc to z-disc; responsible for striated appearance of muscle |
|
|
Term
|
Definition
| composed of thick (myosin) and thin (actin) filaments |
|
|
Term
|
Definition
| actin, troponin, and tropomyosin (troponin tropomyosin complex) |
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Term
|
Definition
|
|
Term
|
Definition
| death is not an event but a brocess--tissues continue to live after brain, heart and lungs fail; a few hours after death, ATP runs out, so muscle cannot relax; after 15-24 hours, myofibrils begin to deteriorate allowing muscles to relax |
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Term
|
Definition
| caused by the bacterium clostridium tetani; excessive muscle contraction |
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Term
|
Definition
| caused by the bacterium clostridium botulinum; muscular paralysis |
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