Unformatted text preview: 9) Exposed actin sites bind with the myosin heads, which have been previously energized by hydrolysis of ATP at the ATPase 10) Binding of actin and myosin causes the cross-bridge to bend and pull the thin filament inward causing the sarcomere to sh o 11) ATP binds to the myosin head causing the head to relax back to the resting position. 12) ATP is hydrolyzed by the myosin ATPase re-energizing the myosin protein head. 13) Ca++ is actively transported back into the sarcoplasmic reticulum. 14) After Ca++ is removed and the action potential has ceased, the troponin-tropomyosin complex returns to its original config u...
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- Fall '08