ATP is hydrolyzed, leading to the re-energizing and repositioning of the cross bridge. 25. What would happen if all the myosin cross bridges were synchronized

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The binding of ATP to the cross bridge, which results in the cross bridge disconnecting from actin. 5. The hydrolysis of ATP, which leads to the re-energizing and repositioning of the cross bridge. 6. ATP Energizes Active Transport across Membranes. ATP can supply the energy for transporting an ion or a molecule across a membrane into another aqueous compartment where its concentration is higher.

Atp energizes the of the cross bridge

A laser-flash photolysis study. Somlyo AV(1), Goldman YE, Fujimori T, Bond M, Trentham DR, Somlyo AP. Author information: (1)Pennsylvania Muscle Institute, University of Pennsylvania School of Medicine, Philadelphia 19104. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators Muscle contraction is caused by the sliding action of thick filaments over thin filaments of the myofibril. Myosin is a major component of thick filaments and most myosin molecules are composed of a head, neck, and tail domain; the myosin head binds to thin filamentous actin, and uses ATP hydrolysis to generate force and "walk" along the thin filament.

Cross-bridge cling continues until the calcium ions and ATP are no longer available. Calcium-Induced Calcium Release The concentration of calcium within muscle cells is controlled by the sarcoplasmic reticulum, a unique form of endoplasmic reticulum in the sarcoplasm.

2. Attachment of myosin to actin to form cross-bridges.

Cross bridge slippage induced by the ATP analogue AMP-PNP and stretch in glycerol-extracted fibrillar muscle fibres. Biophys Struct Mech. 1978 Apr 13; 4 (2):159–168. Lovell SJ, Harrington WF. Measurement of the fraction of myosin heads bound to actin in rabbit skeletal myofibrils in rigor. J Mol

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calcium. ____ of ATP energizes the cross-bridge. hydrolysis. 3 structures involved with calcium release. foot processes, DHP receptors, ryanodine receptors.
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What would happen if all the myosin cross bridges were synchronized (doing the same thing at the same time)?

Energizes the power stroke of the cross bridge.
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Page 22. Step 4: Disconnecting the Cross Bridge. This animation shows ATP binding to the cross bridge, allowing the cross bridge to disconnect from the actin. ** Note that even though the ATP has bound, the energy has not yet been transferred from the ATP to the cross bridge since the head is still tilted backward. Page 23.

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The Cross-Bridge Muscle Contraction Cycle. ATP first binds to myosin, moving it to a high-energy state. The ATP is hydrolyzed into ADP and inorganic phosphate (P i) by the enzyme ATPase. The energy released during ATP hydrolysis changes the angle of the myosin head into a “cocked” position, ready to bind to actin if the sites are available.

The process starts again. One ATP molecule is required for: a.