Chapter 10
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41 terms
Terms | Definitions |
|---|---|
Functions of muscular tissue | produce body movement, stabilizing body positions, storing and moving substances, generate heat |
Properties of muscular tissue | electrical excitability, contractility, extensibility, elasticity |
Skeletal muscle tissue | striated and voluntary primarily attatched to bones |
Cardiac muscle tissue | striated and involuntary forms the wall of the heart |
Smooth muscle tissue | non-striated and involuntary located in visceral organs |
Sphincters | ring like bands of smooth muscles |
Isometric | holding straight out, extention |
Isotonic | flexing shortening length of muscle |
Example of extensibility | uterus stretching to house fetus |
Fascia | sheet of irregular connective tissue surrounding muscles |
Deep fascia | lines body walls |
Epimysium | outermost layer surrounding whole muscles |
Perimysium | layer of dense irregular tissue surrounds fascicles |
Endomysium | made up of reticular fibers wraps around each muscle fiber |
Myofibril | contain thin and thick filaments arranged in sacromeres |
Sarcolemma | plasma membrane of muscle fiber |
Sarcoplasmic reticulum | stores calcium |
Sarcoplasm | contains glycogen to be used for ATP production |
Sarcomere | functional unit of myofibril |
Thick filament | made of myosin |
Thin filament | made of actin |
Myosin to binding site | the muscle will continue to contract |
Mitochondria in skeletal muscle fiber are arranged in | rows near contractile muscle proteins |
Atpase is located | myosin |
Single unit smooth muscle fibers | will under go stress-relaxation response when stretched |
Dystrophin | protein that reinforces sarcolema |
Aponeurosis | type of tendon that formed as a broad flat layer |
Beginning of a contraction | calcium ions are released from sarcoplasmic reticulum into cytosol |
During contraction | thin filaments are pulled towards M line |
Structure sequence for muscle contraction | axon of neuron, sarcolema, T-tubules |
Latent period | calcium is released into sarcoplasm |
M line to Z disc | contain titin |
Hypertrophy | muscle enlargement, increase in diameter of muscle fibers |
Myosin | motor protein in all three muscle tissues |
Fast oxidative glycolytic | leg muscles |
Fast glycolytic | biceps |
ATP hydrolysis reaction | energizes the myosin head |
Fused tetanus | muscle contraction where twitches can't be detected |
Fibrillation | contraction not visible under skin |
Slow oxidative | least powerful muscle fiber |
ATP and calcium ions | contraction will continue if these are in cytosol |
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