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Ch 10 Muscle 1
12, 13,14
| Question | Answer |
|---|---|
| a sheath of areolar connective tissue that wraps around individual skeletal muscle fibers | endomysium |
| dense irregular connective tissue that separates a muscle into groups of individual muscle fibers | perimysium |
| bundles of muscle fibers | fascicles |
| the outermost connective tissue layer that encircles an entire skeletal muscle | epimysium |
| dense irregular connective tissue that lines the body wall and limbs and holds functional muscle units together | fascia |
| a cord of dense regular connective tissue that attaches muscle to the periosteum of bone | tendon |
| muscle cell | muscle fiber |
| areolar and adipose connective tissue that separates muscle from skin | subcutaneous layer |
| connective tissue elements extended as a broad, flat layer | aponeurosis |
| a two-layer tube of fibrous connective tissue enclosing certain tendons | tendon (synovial) sheath |
| synapse between a motor neuron and a muscle fiber | neuromuscular junction |
| invaginations of the sarcolemma from the surface toward the center of the muscle fiber | transverse tubules |
| myoblasts that persist in mature skeletal muscle | satellite cells |
| plasma membrane of a muscle fiber | sarcolemma |
| oxygen-binding protein found only in muscle fibers | myoglobin |
| Ca+ storing tubular system similar to smooth endoplasmic retuculum | sarcoplasmic reticulum |
| the contracting unit of a skeletal muscle fiber | sacomere |
| middle area in the sarcomere where thick and thin filaments are found | A band |
| area in the sarcomere where only thin filaments are present but thick filaments are not | I band |
| separates the sacrcomeres from each other | Z disc |
| area of only thick filaments | H zone |
| cytoplasm of a muscle fiber | sarcoplasm |
| composed of supporting proteins holding thick filaments together at the H zone | M line |
| has fibers joined by intercalated discs | cardiac muscle |
| thick and thin filaments are not arranged as orderly sarcomeres | smooth muscle |
| uses satellite cells to repair | skeletal muscle |
| striated | skeletal & cardiac muscle |
| contraction begins slowly but lasts for long periods | smooth muscle |
| has an extended contraction due to prolonged calcium delivery from both the sarcoplasmic reticulum and the interstitial fluid | cardiac muscle |
| does not exhibit autorhythythmicity | skeletal muscle |
| uses pericytes to repair damaged muscle fibers | smooth muscle |
| uses troponin as a regulatory protein | skeletal muscle & cardiac muscle |
| can be classified as single-unit or multiunit | smooth muscle |
| can be autorhthmic | smooth |
| uses calmodulin as a regulatory protein | cardiac muscle & smooth muscle |
Created by:
ktorn
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