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Muscle Contraction - ADP and inorganic phosphate groups 7...

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AP Biology Muscle Contraction - Complete Process of Muscle Contraction (Sliding-Filament Model) 1) Neurotransmitters are released from motor neuron (Acetylcholine); they are diffused at the synaptic terminal 2) Action Potential is propagated through the cell membrane and goes across the transverse tubule (T-tubule). 3) This action potential triggers the release of calcium ions from sarcoplasmic recticulum (SR) 4) This calcium ion binds to the calcium binding sites, which are at the troponin complex 5) Tropomyosin then exposes the myosin-binding sites 6) Myosin head binds to the actin by forming cross-bridge; ATP is hydrolyzed into
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Unformatted text preview: ADP and inorganic phosphate groups 7) This high energy myosin attaches to the actin filament and this filament moves toward center of sarcomere *** Muscle contraction is a process that overlaps filaments each other, not the process of shortening each filament -Summation & Tetanus 1) Summation = The process where the action potentials are combined with partial relaxation 2) Tetanus = The process where the action potentials are not combined with partial relaxation, but rather continuous...
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