the structure of the skeletal system 0.0 / 5 ? Physical EducationInfluence of schoolGCSEAQA Created by: lucyeatkinCreated on: 28-04-14 19:57 what is the agonist? the muscle that contracts 1 of 6 what is the antagonist? the muslce that relaxes 2 of 6 what is the origin and insertion? the origin is attached to the fixed bone and the insertion is attached to the moving bone 3 of 6 what are cardiac muscles and involuntary muscles? cardiac muscles work automatically and constantly, involuntary muscles are muscles you cannot control 4 of 6 what does concentric and eccentric mean? concentric is when the muscle shortens and eccentric is where the muslce lengthens and returns to normal length 5 of 6 what are isotonic contractions and isometric contractions? isotonic is where eccentric and concentric happens. isometric-is where no movement occurs 6 of 6
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