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Definition
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Term
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Definition
>700 in number
36-42% of body weight |
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Definition
| located in the walls of hollow organs and blood vessels |
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Definition
| located in the walls of the heart |
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Term
| Purpose of Skeletal Muscle |
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Definition
movement
maintain posture
support soft tisue and organs
maintain body temperature |
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Term
| Properties of Muscle Tissue |
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Definition
excitability
contractability
elasticity |
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Definition
| via nerves and neurotransmitters |
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Definition
| muscle shortens in length |
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Definition
| can be stretched, but returns to resting length |
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Definition
| an organ covered in epimysium |
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Term
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Definition
| groups of muscle fibers (cells) wrapped in perimysium |
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Term
| Each individual muscle fiber is covered by connective tissue called... |
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Definition
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Definition
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Definition
| a cell membrane of a muscle cell |
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Definition
| cytoplasm with organelles of a muscle cell |
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Term
| Each muscle cell (fiber) is filled with hundreds of contractile rods called... |
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Definition
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Definition
| long thin tubes that are composed sarcomeres |
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Term
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Definition
| the structureal and functional units of muscle cells |
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Term
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Definition
compose each sarcomere
these protein filaments slide together to produce contraction of the entire muscle |
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Term
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Definition
| in the skeletal muscle results from the pattern of actin and myosin protein filament within each sarcomere |
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Term
| Each Sarcomere is Composed of... |
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Definition
two types of myofilaments
area of light and dark bands |
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Term
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Definition
| a thick filament that is held by the M line and has a head that pivots using ATP |
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Term
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Definition
| two Z lines that attach and mark the boundary between sarcomeres |
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Term
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Definition
| contain only Actin (light bands) |
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Term
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Definition
| contain Myosin (dark bands) |
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Term
| ... which separates the muscle cell from its surroundings and becomes positively charged outside and negatively charged inside |
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Definition
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Term
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Definition
| stored energy in sarcolemma |
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Term
| The first step towards muscle contaction |
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Definition
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Term
| Each sarcomere making up the long myofibrils within the muscle fiber is surrounded by a |
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Definition
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Term
| The sarcoplasmic reticulum stores ... that is rleased between the actin and myosin myofilaments to begin contraction |
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Definition
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Term
| The signal to release the Ca++ comes down the ... from the surface of the sarcolemma |
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Definition
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Term
| Each actin has globular molecules with active sites for the myosin pivoting heads to bind to which slide the .... towards the center of the sarcomere |
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Definition
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Term
| Sarcomeres can only contract when ... is present to remove a filament that blocks the actin active sites from contact with myosin |
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Definition
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Term
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Definition
| the blocking filament for actin active sites |
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Term
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Definition
| molecule that hold tropomyosin in place |
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Term
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Definition
| a nerve fiber and all the muscle fibers it stiumlates |
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Term
| Neuromuscular Junction (NMJ) |
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Definition
| location where the nerve's motor end plate contact the muscle fiber |
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Term
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Definition
| -70mV inside the cell (more Na+ outside the cell than inside the fiber) (more K+ inside than outside_ |
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Term
| Sodium-Potassium Exchange Pump |
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Definition
| uses ATP to move Na+ out and K+ in to repolarize the cell |
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Term
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Definition
| resting potential -> depolarization -> action potential -> repolarization -> resting potential |
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Term
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Definition
| 30mV inside and 30mV outside |
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Term
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Definition
| -70mV inside and 30mV outside |
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Term
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Definition
| the liver and skeletal muscle stores glucose as animal starch of glycogen |
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Term
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Definition
| the Kreb's cycle and the Electron Transport System withing the mitochondrion provides sustained energy as ATP if sufficient oxygen is available |
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Term
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Definition
| formation of lactic acid during oxygen debt |
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Definition
| partially contracted muscle |
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Definition
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Definition
| tension and no shortening |
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Term
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Definition
| maximal, sustained contraction |
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Term
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Definition
| sustained contraction with partial rest |
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Definition
| attached end of muscle that does not move |
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Term
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Definition
| attached end of the muscle fiber that moves |
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Term
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Definition
| movement produced by the muscle |
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Term
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Definition
| muscle mostly responsible for the movement |
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Definition
| muscle whose action opposes another |
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Definition
| muscle that helps a prime mover |
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Term
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Definition
| a synergist that stabilizes the origin of a prime mover |
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Term
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Definition
Prime Mover: Biceps Brachii M
Antagonist: Triceps Brachii M
Fixator: Brachialis M |
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Term
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Definition
Prime Mover: Triceps Bracii M
Antagonist: Biceps Brachii M
Fixator: Brachialis M |
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