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When a prime mover contracts and bones move, the muscle than must relax is called the
agonist
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Ligaments and tendons are formed from
connective tissue
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The less movable point of attachment of a muscle crossing a joint when it contracts is the
origin
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What nervous system division originates voluntary muscle movements?
central nervous system
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As their concentration in the sarcoplasm increases, calcium ions bind to ___, changing its shape and liberating tropomyosin from actin binding sites
troponin
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What neurotransmitter is released at the muscle junction when an action potential arrives at the motor neuron terminal?
Acetylocholine (ACh)
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During the propagation of the excitation wave along the sarcolemma, the action potentials travel down the ____, stimulating the intracellular release of calcium ions
transverse (T) tubules
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According to the sliding filament model of muscle contraction, the myofilaments sliding over each other result in the overlapping of myosin and
actin
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A motor neuron plus all of the muscles fibers which it innervates
A motor unit
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The contraction process in a skeletal muscle is initiated by a release of ___ ions from the sarcoplasmic reticulum
calcium
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