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Q: What is the Ac-tin behavior during the power stroke?
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What occurs when actin and myosin filaments slide over each other?

The power stroke of the cross bridge which binds ATP disconnecting it from the actin.


What happens during the power stroke?

in ic engine during poer stroke the high pressure combustible pushes down the piston and expands to produce power


When the myosin head flexes into a bend pulling the actin filament along with it this is called the A. actin reaction B. power stroke C. recovery stroke D. muscle tone E. action potential?

a


The sliding filament mechanism of muscle contraction involves?

during contraction, the thin filaments slide past the thick filaments so that actin and myosin filaments overlap.


How is calcium used in muscle contraction?

Calcium binds to troponin, which moves the tropomyosin out of the way so that myosin can bind to actin; this ultimately causes a power-stroke.


Why does the burned gasoline do more work on the piston of an automobile engine during the power stroke?

The combustion cylcle (power stroke) forces piston down to create engine power.


Does myosin have the ability to swivel when powered by ATP?

Yes...ATP causes myosin to detach from actin. Then, Hydrolysis of ATP, which results in ADP and P, causes conformational change in myosin head to swivel or pivot about its axis and then weakly bind to an actin filament. Once the myosin head binds, a conformational change in the myosin head will cause the P to leave (the ADP is still stuck on). The leaving of the P causes the power stroke or "the pulling of the actin filament/rowing stroke". ADP then leaves and the myosin is now back at its original state.


How can gradation of skeletal muscle contraction be accomplished?

controlled output of action potentials, progressive recruitment of motor units, control of the rate of attachment/reattachment of actin and myosin heads and the power stroke rate


What stroke of a 4 stroke engine provides power to the crankshaft?

the power stroke


What happens to a sarcomere when muscle length changes?

1. Arrangement of thick and thin filaments: In each sarcomere two sets of actin filaments extend partway toward the center. The myosin filaments are arranged such that they partially overlap the actin filaments. Myosin heads on each side point away from the center of the sarcomere.2. During contraction, the interaction of myosin heads with the actin filaments pulls the thin filaments toward the center of the sarcomere. The actin and myosin filaments slide past each other.3. Cross-bridges = attachement betwn myosin heads and binding sites on actin filaments.4. When a muscle cell is stimulated, myosin heads are energized by ATP. They attach to adjacent actin filaments, and tilt in a short "power stroke" toward the center of the sarcomere. Each power sroke requires an ATP. With many power strokes in rapid succession, the actin filaments are made to slide past the myosin filaments.


How do 2 stroke engines provide more power than a 4 stroke?

In a 2 stroke, every second stroke of the engine is a power stroke. In a 4 stroke, every 4th stroke of the engine is a power stroke. Knowing this, a 2 stroke has double the power as a 4, in the same cc


How does engine produce heat?

From the result of combustion during the power stroke of each cylinder.