Biology — Muscle Contraction
The sliding-filament sequence.
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digraph Muscle {
rankdir=LR;
node [shape=box, style=rounded];
"Nerve impulse" -> "Ca2+ released";
"Ca2+ released" -> "Tropomyosin moves aside";
"Tropomyosin moves aside" -> "Myosin binds actin";
"Myosin binds actin" -> "Power stroke (ATP)";
"Power stroke (ATP)" -> "Sarcomere shortens";
}