muscles
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each of the black spaces below before clicking
on it to display the answer.
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| Contractility | The ability of skeletal muscle to shorten with force
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| Excitability | The capacity of skeletal muscle to respond to a stimulus
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| Extensibility | The ability to be stretched
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| Elasticity | ability to recoil to their original resting length
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| Empimysium | Connective tissue sheath surrounding the skeletal muscles
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| Facia | is another connective tissue located outside the epimysium
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| Fibers | faciculi are composed of single muscle cells
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| Endomysium | each fiber is surrounded by loose connective tissue
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| Myofibrils | A thread like structure that extends from one end of the fiber to the other
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| Actin Myofilaments | Thin myofilaments
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| myosin myofilaments | thick myofilaments
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| sarcomeres | are joined end to end
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| resting membrane potential | charge difference across the membrane
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| action potential | brief reversal back to charge
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| motor neurons | a nerve cell that carry action
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| neuromuscular junction | each branch connects to muscle
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| synapse | near the center of the cell
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| motor unit | form a single muscle
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| presynaptic terminal | space between the presynaptic terminal
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| synaprtic vesicles | contains presynaptic terminal
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| acetylcholine | diffuses across synaptic cleft
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| acetylcholinesterase | rapidly broken down by enzymes
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| sliding filament mechanism | sliding of actin myofiliments
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| muscle twitch | contraction of an entire muscle
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| threshold | will not respond to stimulants
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| all or none response | phenomenon
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| lag phase | beginning of contraction
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| contraction phase | time of contraction
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| relaxation phase | time when muscle relaxes
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| tetany | muscle remains contracted
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| recruitment | increase in number of motor units
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| creatine phosphate | can store high energy molecules
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| anaerobic respiration | without oxygen
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| aerobic respiration | with oxygen
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| oxygen debt | amount of oxygen needed for chemical reaction
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| muscle fatigue | used during muscle contraction
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| isometric | length of muscle does not change
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| isotonic | amount of tension produced
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Created by:
ryansteele
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