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SBGR Muscular

SBGR ALH 185 Muscular (2012 EK)

myofibril Organized collections of myofilaments in skeletal and cardiac muscle cells
sarcomere The smallest contractile unit of a striated muscle
actin The protein component of microfilaments that forms thin filaments in skeletal muscles and produces contractions of all muscles through interaction with thick (myosin) filaments
troponin Binds to tropomyosin and to actin, holding the troponin-tropomyosin complex in position
excitation Generation of an action potential in the sarcolemma
twitch A single stimulus-contraction-relaxation cycle in a skeletal muscle
tension A pull
antagonist A muscle that opposes the movement of an agonist
origin In skeletal muscle, the point of attachment that does not change position when the muscle contracts; usually defined in terms of movements from the anatomical position
insertion A point of attachment of a muscle; the end that is easily moveable
hyperextension Extension past the anatomical position
atrophy The wasting away of tissues from a lack of use, ischemia, or nutritional abnormalities
paralysis The loss of voluntary motor control over a portion of the body
botulism Caused by the consumption of food contaminated with toxins produced by Clostridium botulinum
rigor mortis Generalized muscle contraction throughout the body after death
pronation The rotation of the forearm that makes the palm face posteriorly
supination The rotation of the forearm such that the palm faces anteriorly
abduction Movement away from the midline of the body, as viewed in the anatomical position
adduction Movement toward the axis or midline of the body, as viewed in the anatomical position
myasthenia gravis Characterized by loss of Ach receptors at the neuromuscular junctions
Created by: SBGrandRapids