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Chapter 9
| Question | Answer |
|---|---|
| Striated and voluntary | skeletal muscle |
| found in the walls of organs or viscera | smooth muscle |
| found in the walls of blood vessels | smooth muscle |
| striated and involuntary | cardiac muscle |
| found in the heart | cardiac muscle |
| nonstriated and involuntary | smooth muscle |
| found attached to bones | skeletal muscle |
| the only type of muscle that is nonstriated | smooth muscle |
| the only type of muscle that is voluntary | skeletal muscle |
| must be innervated by a somatic motor nerve | skeletal muscle |
| cordlike structure that attaches muscle to bone | tendon |
| small bundles of muscle fibers | fascicles |
| connective tissue that surrounds individual muscle fibers | endomysium |
| flat sheetlike fascia that attaches muscle to muscle or muscle to bone | aponeurosis |
| connective tissue that surrounds the fascicles or bundles | perimysium |
| connective tissue that surrounds a whole skeletal muscle | epimysium |
| series of contractile units that make up each myofibril; extends from Z line to Z line | sacromere |
| Thin protein filaments that extend toward the center of the sacromere from the Z lines | actin |
| thick protein filaments whose "heads" form cross-bridges when they interact with the thin filaments | myosin |
| Calcium is stored within this structure in the relaxed muscle | sarcoplasmic reticulum (SR) |
| an extension of the sarcolemma or cell membrane that penetrates the interior of the muscle; the electrical signal runs along this membrane toward the sarcoplasmic reticulum | t tubule |
| the temporary connection formed when the myosin heads interact with the actin, causing muscle contraction | cross-bridge |
| the troponin-tropomyosin complex and this protein are called the thin filament | actin |
| the muscle responsible for most of the movement in a group of muscles; called the chief muscle | prime mover |
| muscle attachment to the moveable bone | insertion |
| an increase in the size of a muscle because of overuse | hypertrophy |
| muscle attachment to the stationary bone | origin |
| helper muscle; works with other muscles to produce the same movement | synergist |
| abnormal formation of fibrous tissue in muscles; preventing normal mobility | contracture |
| muscle that opposes the action of another muscle | antagonist |
| wasting away or decrease in the size of the muscles | atrophy |
| classified as disuse, denervation and senile | atrophy |