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bio 210-11 chp 9.2

steps in sk m. contraction

QuestionAnswer
step 1. nerve impulse from motor neuron
step 2. ACh is release from motor neuron
step 3. ACh makes neuromusclar gap and binds to ACh receptors
step 4. sarcolemma is stimulated, and impulses travel down T tubles to sarcoplasmic reticulum
step 5. Ca diffuses from SR & binds to troponin
step 6. tropomyosin molecules move and expose specific sights on actin filaments
step 7. actin and myosin filaments link
step 8. actin filaments are pulled inward by myosin cross bridges using ATP
step 9 mucles fibers shortens
8 things needed for m. contraction stiumlant, ATP,ACh m. receptors, Ca, Na, K, protein
Created by: heatxfer
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