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1. What are the three types of muscles found in the muscular system A. Skeletal, cardiac, muscle fibers B. Skeletal, cardiac, smooth C. Skeletal, smooth, connective D. Smooth, cardiac, connective
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2. The contraction of a muscle is due to the movement of A. Skeletal muscle B. Muscle fibers C. Myofibrils D. sarcolemma
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3. Striated, multi-nucleated cells belong to A. Skeletal muscle B. Cardiac muscle C. Smooth muscle D. Connective tissue
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5. All muscles are involved in A. Movement B. Digestion C. Posture D. support
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7. Muscle cells are surrounded and bundled by A. Tendons B. Muscle fibers C. Ligaments D. Connective tissue
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8. The prefix that is used when referring to muscle structure A. Myo, mys B. Mys, endo C. Epi, endo D. Myo, peri
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9. All of the following are functions of skeletal muscles EXCEPT A. Posture B. Heat generation C. Movement D. physique
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10. The connective tissue that wraps and protects each individual muscle fiber A. Epimysium B. Perimysium C. Endomysium D. fascia
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11. The connective tissue that surround and protects the fascicle A. Epimysium B. Perimysium C. Endomysium D. fascia
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12. Another name for muscle fiber is A. Sarcolemma B. Sarcomere C. Muscle cell D. Myofibril
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13. The _____________ is the plasma membrane of the muscle fiber A. Sarcolemma B. Sarcomere C. Sarcoplasmic reticulum D. Myosin filament
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14. This organelle is responsible for the shortening of the muscle during contraction A. Sarcolemma B. Sarcomere C. Sarcoplasmic reticulum D. Myofibril
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15. Thick filaments are composed of the protein A. Actin B. Myosin C. Insulin D. Leucine
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16. The thin filaments are anchored to the Sarcomere by the A. I band B. A band C. H zone D. Z disc
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17. One motor neuron and all the skeletal muscle cells stimulated by that neuron is called a A. Fascicle B. Nerve bundle C. Motor unit D. Motor cell
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18. The junction between the axon terminal and the muscle it is stimulating A. Synaptic cleft B. Neuromuscular junction C. Synaptic junction D. Neurotransmitter junction
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19. When an action potential reaches the axon terminal, ____________ are released A. Neurons B. Vesicles C. Neurotransmitters D. hormones
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20. The specific neurotransmitter involved in skeletal muscle contraction is A. Adenosine triphosphate B. Adenosine diphosphate C. Deoxyribonucleic acid D. Acetyl Choline
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Energy for muscle contraction primarily comes from A. ATP B. ADP C. Ach D. CP
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24. During a contraction the __________ gets shorter A. Sarcomere B. Neuromuscular junction C. Motor Unit D. neurotransmitter
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The protein actin is found on the A. Thick filament B. Myosin C. Thin filament D. Muscle cell
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26. Ca⁺ is stored and released by the A. Sarcoplasmic reticulum B. Nucleus C. Sarcomere D. Myofibril
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27. During contraction the ________ slide over the ____________, taking up the space of the ___________ A. Thick filaments, thin filaments, bare zone B. Thin filaments, thick filaments, bare zone C. Thin filaments, thick filaments, z disc D. Thick filaments, thin filaments, z disc
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28. The previous action is part of the A. Sliding filament theory B. Graded response C. Extensibility D. contractility
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29. Ability to receive and respond to a stimulus A. Excitability B. Contractility C. Extensibility D. Elasticity
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30. Ability of muscle cells to shorten when an adequate stimulus is received A. Excitability B. Contractility C. Extensibility D. Elasticity
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31. Ability of muscle cells to be stretched A. Excitability B. Contractility C. Extensibility D. Elasticity
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32. Ability of muscle cells to recoil and resume resting length after stretching A. Excitability B. Contractility C. Extensibility D. Elasticity
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Study diagram Muscle fiber Endomysium Fascicle Perimysium epimysium
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Muscle fiber diagram Has nucleus so it MUST be the muscle cell – Myofibril – Nucleus – Sarcolemma (cell membrane of muscle)
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Myofibril diagram Myofibril Sarcomere Z disc Light band (I band) Dark band(A band) Thick and thin filaments
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Microfilaments (thick and thin) Sarcomere Z disc Thin fimaments Thick filaments
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Answers B C A D A D C B C A D B D C B C D A C A B A B C D
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