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coldgirl [10]
1 year ago
13

Cross Bridge Cycle View Available Hint(s) Reset Help 1. Location of higher concentration of Ca2+ needed for cross bridge formati

on 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
Social Studies
1 answer:
salantis [7]1 year ago
3 0

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

To know more about cross bridge cycle visit:

brainly.com/question/7031861

#SPJ4

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Protect and provide

The concept of government as provider comes next: government as provider of goods and services that individuals cannot provide individually for themselves. Government in this conception is the solution to collective action problems, the medium through which citizens create public goods that benefit everyone, but that are also subject to free-rider problems without some collective compulsion.

The basic economic infrastructure of human connectivity falls into this category: the means of physical travel, such as roads, bridges and ports of all kinds, and increasingly the means of virtual travel, such as broadband. All of this infrastructure can be, and typically initially is, provided by private entrepreneurs who see an opportunity to build a road, say, and charge users a toll, but the capital necessary is so great and the public benefit so obvious that ultimately the government takes over.

A more expansive concept of government as provider is the social welfare state: government can cushion the inability of citizens to provide for themselves, particularly in the vulnerable conditions of youth, old age, sickness, disability and unemployment due to economic forces beyond their control. As the welfare state has evolved, its critics have come to see it more as a protector from the harsh results of capitalism, or perhaps as a means of protecting the wealthy from the political rage of the dispossessed. At its best, however, it is providing an infrastructure of care to enable citizens to flourish socially and economically in the same way that an infrastructure of competition does. It provides a social security that enables citizens to create their own economic security.

The future of government builds on these foundations of protecting and providing. Government will continue to protect citizens from violence and from the worst vicissitudes of life. Government will continue to provide public goods, at a level necessary to ensure a globally competitive economy and a well-functioning society. But wherever possible, government should invest in citizen capabilities to enable them to provide for themselves in rapidly and continually changing circumstances.

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