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Cards In This Set
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SKELETAL MUSCLE
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One of the striated muscles attached to bones
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FLEXION
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A movement of a limb that tends to bend its joints; the opposite of extension
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EXTENSION
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A movement of a limb that tends to straighten its joints; the opposite of flexion
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EXTRAFUSAL MUSCLE FIBER
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One of the muscle fibers that are responsible for the force exerted by contraction of a skeletal muscle
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ALPHA MOTOR NEURON
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A neuron whose axon forms synapses with extrafusal muscle fibers of a skeletal muscle; activation contracts the muscle fibers
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INTRAFUSAL MUSCLE FIBER
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A muscle fiber that functions as a stretch receptor, arranged parallel to the extrafusal muscle fibers, thus detecting changes in muscle length
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GAMMA MOTOR NEURON
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A neuron whose axons forms synapses with intrafusal muscle fibers
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MOTOR UNIT
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A motor neuron and its associated muscle fibers
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MYOFIBRIL
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An element of muscle fibers that consists of overlapping strands of actin and myosin; responsible for muscular contractions
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ACTIN
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One of the proteins (with myosin) that provide the physical basis for muscular contraction
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MYOSIN
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One of the proteins (with actin) that provide the physical basis for muscular contraction
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STRIATED MUSCLE
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Skeletal muscle; muscle that contains striations
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NEUROMUSCULAR JUNCTION
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The synapse between the terminal buttons of an axon and a muscle fiber
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MOTOR ENDPLATE
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The postsynaptic membrane of a neuromuscular junction
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ENDPLATE POTENTIAL
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The postsynaptic potential that occurs in the motor endplate in response to release of acetylcholine by the terminal button
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