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BIO 169 Muscles-PHYS


surrounds each individual fiber Endomysium
surrounds a group of fibers (fascicle) Perimysium
surrounds an entire muscle, is continuous with tendon. Epimysium
a short section of a myofibril, and is the smallest contractile unit of a muscle fiber sarcomere
bundles of the contractile proteins actin & myosin Myofilaments
repeating A & I bands along the myofibril Striations
Types of Muscle Tissue: voluntarily controlled, attaches to skeleton SKELETAL
Types of Muscle Tissue: involuntarily controlled, only in the heart CARDIAC
Types of Muscle Tissue: Nonstriated, involuntarily controlled, lines internal passageways SMOOTH
Muscle Functions Body movement,Posture, body position Movement & storage of materials Heat generation
Composed of the protein myosin, Anchored by the M line of the sarcomere, do not move during contraction Thick filaments
Thin filaments ARE Composed of the ______ _____ ______ protein actin, tropomyosin, and troponin
Wraps around each myofibril, Stores calcium and releases it into the sarcoplasm when the muscle is stimulated by a motor neuron Sarcoplasmic Reticulum
Passageways that penetrate into the interior of the muscle fiber.Conducts action potentials from the sarcolemma into the deepest parts of the muscle cell T tubules
Created by: ascpstudent100