Chapter 9

Chapter 9

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helps regenerate ATP creatine
thick filaments of muscle fiber myosin
type of muscle that connects to bones skeletal
store neurotransmitters vesicles
neurotransmitters used to cause muscle contractions acetylcholine
connects muscles to bones tendons
individual muscle fiber myofibril
organelle that provides the energy needed for muscle contraction mitochondria
connects bones to other bones ligaments
surrounds fascicles peromysium
thin filaments of a muscle fiber actin
minimal level of stimulus to cause a contraction threshold
section of a myofibril from one Z line to another sarcomere
bundle of muscle fibers
fascicle
explains how muscle contraction works sliding filament theory
outermost layer surrounds entire muscle epimysium
describes muscles that are striped in appearance striated
muscle fiber membrane sarcolemma
space between a neuron and the muscle synaptic cleft/gap
overlapping patterns of actin and myosin I/A bands
channels that surround the myofibrils sarcoplasmic reticulum
when muscles become tired muscle fatigue

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