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16 terms

Anatomy Muscles Quiz

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Perimysium
connective tissue surrounding a fasicle
Epimysium
Connective tissue ensheathing the entire muscle
Sarcomere
contractile unit of muscle
Fiber
a muscle cell
Endomysium
thin connective tissue investing each muscle cells
Sarcolemma
plasma membrane of the muscle cell
Myofibril
a long, filamentous organelle found within muscle cells that has a banded appearance
Myofilament
actin- or myosin-containing structure
Tendon
cordlike extension of connective tissue beyond the muscle, serving to attach it to the bone
Fascicle
a discrete bundle of muscle cells
Tetanus
a continuous contraction that shows no evidence of relaxation
Isotonic Contraction
a contraction in which the muscle shortens and work is done
Many Moter Units
stimulated at a rapid rate to accomplish a strong contraction
Few Moter Units
stimulated at a rapid rate when a weak but smooth muscle contraction is desired
Fatigue
when a muscle is being stimulated but is not able to respond due to "oxygen debt"
Isometric contraction
a contraction in which the muscle does not shorten but tension in the muscle keeps increasing