15 terms

08 Muscles - Cellular Structure

Terms related to the muscular system.
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Myofibrils
composed of actin and myosin
Cholinesterase
causes acetylcholine to decompose
Skeletal Muscle
under voluntary control
Smooth Muscle
found in the intestine
Acetylcholine
necessary for muscle contraction
Sarcomere
the functional unit of the muscle
Atrophy
muscles shrink due to lack of use
Sliding Filament Theory
explains how muscles contract
Epimysium
tissue that surrounds whole muscle
Perimysium
tissue that surrounds fascicles
Endomysium
tissue that surrounds single myofibrils
Actin
Thin filaments
Myosin
Thick Filaments
Threshold
Minimal stimulus required for contraction
Z line
Forms the boundary of a sarcomere