For Mrs. Eastham Anatomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Contractility | ability of skeletal muscle to shorten with force
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| Excitability | capacity of skeletal muscle to respond to a stimulus
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| Extensibility | ability to be stretched
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| Elasticity | ability to recoil to their original resting length after they have been stretched
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| Three types of muscle | skeletal, smooth, cardiac
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| connective tissue sheath that Surrounds each skeletal muscle | epimysium
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| loose connective tissue located outside the epimysium; surrounds and separates muscles | Fascia
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| visible bundles that make up muscles | fasciculi
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| loose connective tissue that surrounds the fasciculi | perimysium
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| single muscle cells that make up fasciculi |
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| each fiber is surrounded by a connective tissue sheath called | endomysium
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| cytoplasm of each fiber is filled with___, a threadlike structure that extends from one end of the fiber to the other | myofibrils
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| Myofibrils contain these 2 major types of protein fibers(myofilaments) | actin(thin) and myosin(thick)
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| Actin and Myosin myofilaments form highly ordered units called | sarcomeres
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| basic structural and functional unity of the muscle | sarcomeres
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| the charge difference across the membrane | resting membrane potential
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| the brief reversal back of the charge is called | action potential
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| nerve cells that carry action potentials to skeletal muscle fibers | motor neurons
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| Axons enter | muscles and branch
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| Each branch that connects to the muscle forms a ___ or ___ near the center of the cell | neuromuscular junction or synapse
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| A single motor neuron and all the skeletal muscle fibers it innervates are called | a motor unit
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| the enlarged nerve terminal is the | presynaptic terminal
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| the space between the presynaptic terminal and the muscle cell is the | synaptic cleft
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| the muscle fiber (in nerves) | postsynaptic terminal
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| each synaptic terminal contains | synaptic vesicles
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| synaptic vesicles secrete a neurotransmitter called | acetylcholine
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Created by:
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