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CH. 10-11 Voc. 1
Term | Definition |
---|---|
Aponeurosis | broad, tendon-like sheet of connective tissue that attaches a skeletal muscle to another skeletal muscle or bone |
Contractility | ability to shorten (contract) forcibly. allows muscle tissue to pull on its attachment points and shorten with force |
Elasticity | Ability to stretch and rebound; recoil back to its original length sue to elastic fibers |
Irritabiility | ability to receive and respond to a stimulus |
Extensibility | ability to lengthen (extend); stretch or extend |
Fascia | fibrous tissue enclosing a muscle |
Insertion | end of skeletal muscle that is attached to the structure (usually a bone) that is moved when the muscle contracts |
Multinucleated | muscle cells that contain more than one nucleus |
Myofilament | Myosin and actin, parallel fibers within a sarcomere that created the I and A bands |
Myoglobin | allows for more efficient muscle contractions and less fatigue |
Origin | end of a skeletal muscle that is attached to another structure (usually a bone) in a fixed position |
Perimysium | connective tissue that bundles skeletal muscle fibers into fascicles within a skeletal muscle |
Sarcolemma | plasma membrane of a skeletal muscle fiber |
Sarcomere | repeating basis unit of skeletal muscle; composed of actin and myosin |
Sarcoplasm | cytoplasm of a muscle cell |
Striated | alignment of parallel actin and myosin filaments which form a banded pattern |
Tendon | dense connective tissue structure that anchors a muscle to a bone |
Epimysium | outer layer of connective tissue around skeletal muscle; allows a muscle to contract and move powerfully while maintaining its structural integrity |
Endomysium | loose connective tissue covering each muscle fiber in a skeletal muscle. contains extracellular fluid and nutrients to support the muscle fiber |