Term
| 4 functional characteristics of muscle tissue |
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Definition
contractibility elasticity excitability extensibility |
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Term
| 3 basic functions of muscle tissues |
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Definition
movement posture maintenance & joint stability heat generation |
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Term
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Definition
| skeletal muscle contractions pull on tendons and move the bones of the skeleton. |
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Term
| posture maintenance and joint stability |
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Definition
| tension in our skeletal muscles maintains body posture. |
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Term
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Definition
| muscle contractions require energy; whenever energy is used in the body, some of it is converted to heat. The heat is released by working muscles. Keeps body temp. in the range required for normal functioning. |
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Term
| 3 skeletal muscle wrappings |
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Definition
epimysium perimysium endomysium |
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Term
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Definition
| surrounds entire muscle w/ dense collagen fibers |
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Term
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Definition
| divide the skeletal muscle into a series of compartments, each containing a bundle of muscle fibers called a fascicle. |
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Term
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Definition
| surrounds the individual muscle cells, or muscle fibers. |
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Term
| 2 skeletal muscle extensions |
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Definition
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Term
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Definition
| aka: tendon; bundle of epimysium, perimysium, and endomysium collagen fibers located at the end of each muscle |
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Term
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Definition
least moveable part of muscle |
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Term
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Definition
most moveable part of muscle |
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Term
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Definition
| bundle of muscle fibers found w/in the departments in the perimysium |
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Term
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Definition
| length of muscle cells; sarcoplasm |
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Term
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Definition
| fine protein filaments composed primarily of the actin proteins |
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Term
| sarcoplasm/sarcoplasmic reticulum |
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Definition
| the cytoplasm of a muscle cell. |
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Term
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Definition
| the transverse, tubular extensions of the sarcolemma that extend deep into the sarcoplasm, contracting cisternae of the sarcoplasmic reticulum. |
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Term
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Definition
| the protein component of thick filaments |
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Term
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Definition
| the protein component of microfilaments that forms thin filaments in skeletal muscles and produces contractions of all muscles through interaction w/ myosin filaments. |
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Term
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Definition
| mark the boundaries between adjacent sarcomeres. |
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Term
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Definition
| made up of thick filaments located at the center of a sarcomere. Length is equal to normal thick filament. |
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Term
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Definition
| extends from A band of one sarcomere to A band of another sarcomere; contains only thin filaments |
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Term
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Definition
| in a resting sarcomere, is the lighter region on either side of M line. Contains only thick filaments. |
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Term
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Definition
| dark staining proteins; help stabilize the positions of thick filaments |
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Term
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Definition
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Term
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Definition
| 3 globular subunits; one binds to tropomysium, second binds to one g-actin, third binds to 2 calcium ions. |
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Term
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Definition
| cover active sites on g-actin and prevent actin/myosin interaction. |
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Term
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Definition
| when the myosin heads interact w/ thin filaments during a contraction. |
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Term
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Definition
| intracellular organelle responsible for generating most of the ATP required for cellular operations. |
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Term
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Definition
| the plasma membrane of a muscle cells |
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Term
| 5 steps for generation of muscle action potential across the synapse |
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Definition
1.) The arrival of action potential. 2.) The release of ACh. 3.) ACh binding at the motor end plate. 4.) Appearance of an action potential in the sarcolemma. 5.) Return to initial state. |
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Term
| 5 steps of excitation coupling |
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Definition
1.) Exposure of active sites. 2.) Formation of cross-bridges. 3.) Pivoting of myosin heads. 4.) Detatchment of cross-bridges. 5.) Reactivation of myosin. |
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Term
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Definition
| A single-contraction-relaxation cycle in a skeletal muscle. |
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Term
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Definition
| system requiring the presence of oxygen |
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Term
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Definition
| burning when you've used all oxygen -> oxygen debt |
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Term
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Definition
| neck toned to hold up head, posture muscles, etc. |
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Term
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Definition
| The wasting away of tissues from a lack of use, ischemia, or nutritional abnormalities. |
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Term
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Definition
| An increase in tissue size w/o cell division. |
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