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MUSCLE, download (2), 8D7DD806-F3BF-4EB3-A0A3-040C90DB8023, image - Coggle…

- - - - consists
        :memo: actin strands (thin filament)
        :memo: myosin (thick filament)
        
        During contraction
        :memo:A muscle contracting is all about sarcomeres contracting, bringing those Z-lines closer together.
        :memo: When your muscle cells are at rest, your actin & myosin strands don’t touch, but they really, really want to.
        Specifically, that club-headed myosin wants to get all up-close-and-personal with the actin.
        Sliding Filament Model
        
        Triggered ACTION POTENTIAL
        1.ACh released .
        
        Action potential reaches T tubule
        
        Sarcoplasmic reticulum releases Ca2+
        
        Active sites exposed and cross-bridge form
        
        Contraction cycle begin
  - - - antagonisis
        working in reverse as that particular movement.
        by staying relaxed, or stretching or contracting just enough to keep those prime movers from over-extending.
      - Prime movers
        muscle that are mainly responsible for
        producing a certain movement.
      - synergists
        help the prime movers lending a little
        extra oomph stabilizing joints against dislocation
      - fixators
    - - Big motor units
        :memo: for movement like walking, running, squatting
      - Small Motor units
    - - Period of contraction
      - Latent period
      - Relaxation period
    - - Large Motor Unit, large fibers are enlisted, increasing the strength of contraction
      - Smallest motor units, smallest fibers are activated by your most excitable neurons
    - - ISOTONIC
        :memo: changing the length of the muscle involved
      - ISOMETRIC
        :memo: without changing the length of the muscle involved