muscular

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  • Muscular System
    • muscle types
      • Cardiac muscle
        • found only in heart-involuntary
      • Skeletal muscle
        • attached to the skeleton-voluntary
      • voluntary muscles
        • under our conscious control - we can move them when we want
      • involuntary muscles
        • are not under our conscious control
    • Antagonistic muscle pairs
      • what is this?
        • a pair of muscles that work together. one of the muscles contract (the agonist) to move the body part while the other contacts to return the body part to its priginal position
          • for example when performing a bicep curl, the biceps will be the agonist as it contracts to move , while the triceps will be the antagonist as it relaxes to allow the movementour
      • antagonistic muscle pairs at joints
        • elbow
          • antagonistic pair = bicep and tricep
            • movement produced = flexion , extension
              • sporting example =  chest pass in netball
        • knee
          • antagonistic muscle pair = hamstrings and quadriceps
            • movement produced = flexion, extension
              • tuck jump in trampolining
        • shoulder
          • antagonistic muscle pair =  latissimus dorsi and deltoid
            • movement produced = adduction , abduction.
              • golf swing
      • fixators
        • to allow antagonistic muscle pairs to work properly, other muscles called fixators assist by supporting and stabilizing the joint and the rest of the body
          • the trapezius muscle can act as a fixator when the bicep is flexing at the elbow joint
          • the abdominals can act as fixators to stabilize the body for hip and knee movements

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