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Anat-Muscl Prop/Name

Stack #215714

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