Please enable JavaScript.

Coggle requires JavaScript to display documents.

skeletal muscle (structure (neuromuscular junction (formed with myelinated…

- - - - tail consists of two intertwined heavy chains
      - two globular heads extend out, forming cross-bridges
      - globular heads contain binding sites for actin and ATP
      - thick finament
    - - contractile protein
      - similar to string of pearls twirled together
      - thin filament
    - - regulatory protein
      - overlaps binding sites on actin for myosin and inhibits interaction when in relaxed state, won't allow contraction to occur
    - - regulatory protein
      - forms complex with other proteins of the thin filament
      - binds Ca2+ reversibly and once bound changes conformation to pull tropomyosin away from myosin interaction sites
  - - - some of fastest firing motor neurons
      - largest-diameter axons in body
      - cell body in brainstem or spinal cord
- - - - step 2: ATP hydrolyzed by myosin to ADP and Pi
        
        step 3:: Pi is released, population of myosin heads cross bridge with actin
        
        step 4: ADP is released from head, causing head to go from relaxed state to rigor state-power stroke, muscle contracted
- - - - in short term, most common source of ATP