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Ch 10 Muscle 1

12, 13,14

QuestionAnswer
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