Stack #215714
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properties of muscle tissue | contractility, excitability, extensibility, elasticity
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contractility | ability of a muscle to shorten with force (that is then used to generate action)
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excitability | capacity of a muscle to respond to a hormonal or nervous stimulus
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extensibility | muscle can be stretched to its normal resting length and beyond to a limited degree
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elasticity | ability of muscle to recoil to its original resting length after being stretched
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tendon | attaches muscle to bone
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aponeurosis | a very broad tendon. like a flat sheet
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aponeurosis locations | abdominal wall and back
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origin/head | muscle end attached to the more stationary of the two bones, undergoes the least amount of movement when the muscle contracts
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insertion | muscle end attached to the bone with the greatest movement
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belly | largest portion of the muscle between the origin and insertion
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agonist | muscle causing an action when it contracts
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prime mover | one muscle out of several doing the same movement that is most responsible for the action
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antagonist | a muscle working in opposition to an agonist
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synergists | muscles that work together to cause a movement, muscles that perform the same action
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fixators | stabilize joint(s) crossed by the prime mover
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pennate muscles | "feather-like in shape", have one or more tendons extending through their body and the muscle fibers are arranged at an oblique angle to the tendon
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unipennate muscle | muscle fibers attach to only one side of the central tendon
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bipennate muscle | muscle fibers attach to both sides of the central tendon
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multipennate muscle | multiple branches of the central tendon with fibers attaching on both sides
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parallel muscle | the muscle fibers run parallel to its long axis
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rectus | muscle fiber direction is vertical (straight up and down)
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convergent muscle | has widespread muscle fibers that converge on a common attachment site
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circular muscle/sphincter | the muscle fibers are concentrically arranged around an opening or recess
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quadratus | rectangular
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trapezius | trapezoidal (4 sides, none parallel)
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deltoid | triangular
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rhomboidal | rhombus
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major | muscle that is larger than another muscle
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minor | muscle that is smaller than another muscle
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biceps | two tendons/heads of origin
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triceps | three tendons/heads of origin
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fusiform | tapering at both ends with a thick belly
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digastric | two bellies
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Created by:
Jean-O
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