Anatomy Chapter 6 Study Stack 7/8
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Muscle cells | Muscle Fibers
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| The ability of skeletal muscle to shorten with force | Contractility
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| The capacity of skeletal muscle to respond to a stimulus | Excitability
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| The ability to be stretched | Extensibility
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| Recoil to their original resting length after they have been stretched | Elasticity
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| Each skeletal muscle is surrounded by a connective tissue sheath | Epimysium
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| Another connective tissue located outside the epimysium. (surrounds and seperates muscles.) | Fascia
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| A muscle is composed of numerous visible bundles | Muscle fasciculi
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| Fasciculi is surrounded by loose connective tissue | Perimysium
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| The fasciculi is composed of single muscle fibers | Fibers
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| Each fiber is surrounded by a connective tissue sheath | Endomysium
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| Myofibrils consist of 2 major types of protien fibers | Actin myofilaments and myosin myofilaments
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| Thin myofilaments | Actin
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| Thick myofilaments | Myosin
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| Actin and myosin filaments form highly ordered units | Sarcomeres
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| Basic structural and functional unity of the muscle | Sarcomere
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| Four Major Functional Characteristics | Contractility, excitability, extensibility, elasticity.
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| Each sarcomere extends from one Z line to | Another Z line
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| Each Z line is an attachment site for | Actin
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| Each side of the Z line is a light area called _______, it consists of actin | I band
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| In the center of each sarcomere is another light area called the ___________, which consists of myosin | H zone
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| The myosin myofilaments are anchored in the center of the sarcomere at a dark staining band called the __________. | M line
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| The change difference across the membrane. | Resting membrane potential
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| The brief reversal of the charge. | Actin potential
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| Nerve cells that carry actin potentials to skeletal muscle fibers | Motor neurons
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| Each branch that connects to the muscle forms a ________________, or __________ near the center of the cell | Neuromuscular junction; synapse
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