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Start studying focus figure 9.3 This action generates the force required for muscle contraction. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

When myosin heads bind to actin they use chemical energy from the breakdown of atp to generate a pulling force against actin filaments, then detach and prepare to bind again It is called this because a link between myosin and actin forms, then breaks, then forms again, over and over. This diagram represents the sequence of events that occurs when a motor neuron stimulates a muscle fiber to contract

B atp is hydrolyzed to adp and a phosphate allowing the myosin head to move towards.

The cross bridge cycle is a series of events that occur between the thick and thin filaments in muscle fibers during muscle contraction The four main steps of the cross bridge cycle are attachment, power stroke, detachment, and recovery.

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