Label the figure of muscle organization. Connective tissue sheath Myosin (thick) filament Muscle Muscle fiber Bundle of muscle fibers Myofibril Tendon Bone Blood vessels Cell membrane Endoplasmic reticulum Axon of motor neuron Nuclei Sarcomere Actin (thin) filament
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Match the words with their defining feature. ______osteoblast ______muscle twitch ______muscle tension ______joint ______myosin ______marrow ______metacarpals ______myofibrils ______muscle fatigue a. actin's partner b. all in the hands c. blood cell production d. decline in tension e. bone-forming cell f. motor unit response g. force exerted by cross-bridges h. area of contact between bones i. muscle fiber's threadlike parts
Match the M words with their defining feature. _______muscle _______muscle twitch _______muscle tension _______myosin _______motor neuron _______myofibrils _______muscle fatigue a. actin's partner b. delivers contraction signal c. a muscle cannot contract d. motor unit response e. force exerted by crossbridges f. muscle cells bundled in connective tissue g. threadlike parts in a muscle fiber
Label this diagram of a muscle fiber, using these terms: myofibril, T tubule, sarcomere, sarcolemma, sarcoplasmic reticulum, $Z$ line.
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