Question

Cross Bridge Cycle View Available Hint(s) Reset Help 1. Location of higher concentration of Ca2+ needed for cross bridge formation and cycling actin binding sites blocked energized/cocked myosin head 2. Actin status to begin cross bridge formation: extracellular fluid 3. Moleculo(o) bound to the myosin head at the start of the cross bridge cycle: cytoplasm 4. Energy state of myosin for beginning cross bridge formation: ADP and PI low-energy myosin head actin-binding sites exposed Submit The Power Stroke When the bond between myosin and actin forms, ADP and Pare released. In the power of working, stroke, the release of ADP and triggers the myosin head to pivot into its low-energy conformation as the myosin neck extends. Since the two filaments are still bound, the movement of the myosin head causes the actin filament to be pulled along with it. This action ratchets the actin myofilaments toward the M line, changing the lateral boundaries of the sarcomere (le, the Z dises

Answer 1

Troponin binds to Ca2+ from the sarcoplasmic reticulum. The propagation of an action potential along a skeletal muscle fiber causes the release of Ca2+.

What is a cross-bridge cycle?

As seen by the cross-bridge cycling, the action of the contractile proteins shortens muscles. The cross-bridge muscular contraction cycle can be seen in many types of muscles, including cardiac, smooth, and skeletal muscles. Therefore, when riding across bridges, all muscle groups contract.

What transpires in skeletal muscle during a cross bridge cycle?

The Pi dissociates after the myosin creates a cross-bridge with actin, causing the myosin to proceed through the power stroke and shorten the sarcomere, which lowers its energy state. In order to dismantle the cross-bridge

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