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Related Flashcards
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Cards In This Set
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Actin
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A thin protein filament that acts with myosin filaments to produce muscle action
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Action Potential
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A rapid and substantial depolarization of the membrane of a neuron or muscle cell that is conducted through the cell
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Adenosine Triphosphatase (ATPase)
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An enzyme that splits the last phosphate group off ATP, releasing a large amount of energy and reducing the ATP tp ADP and P=i
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Adenosine Triphosphatase (ATP)
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A high energy phosphate compound from which the body derives its energy.
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A-Motor Neuron
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A neuron innervating extrafusal skeletal muscle fibers.
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Concentric Contraction
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Muscle shortening.
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Eccentric Contraction
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Any muscle action in which muscle lengthens.
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Dynamic Contraction
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Any muscle action that produces joint movement.
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Endomysium
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A sheath of connective tissue that covers each muscle fibers.
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Epimysium
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The outer connective tissue that that surrounds an entire muscle, holding it together.
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Fasciculus
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A small bundle of muscle fibers wrapped in a connective tissue sheath within a muscle.
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Fast-Twitch (type II) Fiber
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A type of muscle fiber with a low oxidative capacity and a high glycolytic capacity; associated with speed and power activities.
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Motor Unit
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The motor nerve and the group of muscle fibers it innervates
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Muscle Fiber
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An individual muscle cell
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Myofibril
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The contractile element of skeletal muscle
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