CSCS Exam Practice Questions 2024, NSCA CSCS - Study Review Rated A+
CSCS Exam Practice Questions 2024, NSCA CSCS - Study Review Rated A+ Perimysium (surrounding group of fibers/fascicules) Endomysium (surrounding individual fibers) Fascia Delicate "cobwebby" tissue Motor Unit Motor Neuron and the muscle fibers it innervates Typically several hundred muscle fibers in a single motor unit Sarcolemma The plasma membrane of a cell Transverse Tubules Connect to plasma membrane to interior Action potentials travel through Ensures AP excites all parts of the muscle fiber at the same time Sarcoplasm (muscle cytoplasm) Glycogen, myoglobin, mitochondrion Myofibrils Contractile organelles Extend length of muscle fiber Sarcoplasmic Reticulum Membranous sacs around each myofibril Stores Calcium ions (Ca2+) Release of Ca2+ triggers muscle contraction Filaments Function in the contractile process Thick and thin filaments 2 thin for every 1 thick Sarcomere Compartments of arranged filaments Basic functional unit of a myofibril
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