Cross bridges are formed during muscle contraction when _____ on the thick filaments binds to ______ on the thin filaments.

Question

Quizplus · Accepted Answer

During muscle contraction, cross bridges are formed when myosin heads on the thick filaments bind to actin on the thin filaments, causing them to slide past each other and shortening the muscle fiber. Troponin and tropomyosin are regulatory proteins that control access to the actin binding sites on the thin filaments.

Cross Bridges Are Formed During Muscle Contraction When _____ on the Thick