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In region of overlap what is present

What do electron micrographs of the dark bands show

What are these bridges part of and what they do

what is this called and why

What is each myosin filament made up of

Where do the myosin cross bridges point

What does each of the cross bridges have

In a resting muscle what does each myosin head have

When an action potential arrives

As the myosin head tilts what happens